2025 Acura MDX

These are unverified consumer reports filed with NHTSA, shown as submitted.

• 12/30/2025· UNKNOWN OR OTHER

  The auto start stop function is not working, the car turn-off completely and I have to start the engine by pressing the start button.

• 12/18/2025· ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE

  I was at a red light. My auto idle kicked in. I went to turn it off and Either simultaneously or right before I hit the idle off button my car stalled. It took several attempts to turn back on and a bunch of codes threw. I almost got rear ended. This is a known problem. Ive contacted acura / honda via email as well.

• 12/16/2025· BACK OVER PREVENTION

  I am a three-time Acura owner currently leasing a 2025 Acura MDX through Honda/Acura. On or about 12/02/2025, at approximately 16,297 miles, a front parking sensor fell out of the front bumper while I was driving. I am concerned that this reduces the reliability of the front parking/safety system and could put safety at risk if a driver relies on the sensors to detect obstacles at low speeds (parking, maneuvering, etc.) while the hardware is no longer properly secured. There was no crash or injury in this incident, but the failure affected a safety-related system on a low-mileage vehicle. Before I noticed the sensor was missing, the front alert on the dashboard began going off repeatedly while I was driving, even though there was nothing in front of the vehicle. That was the first indication that something was wrong with the system. Only after I parked and inspected the front of the vehicle did I see that the front parking sensor had come out of the bumper, which confirmed the source of the problem. The problem was inspected and confirmed by an authorized Acura dealer, who diagnosed broken internal mounting clips on the front sensor. The dealer and manufacturer attributed the failure to “outside influence” (implying that I must have hit something), but no impact damage or other physical evidence was found on the front of the vehicle. The front remains normal and pristine with no dents, cracks, gouges, chips, or distortion of the bumper, paint, grille, or sensor area. I am concerned that a likely part or installation failure on a low-mileage vehicle is being dismissed as “outside influence” based purely on assumption rather than documented physical evidence. In effect, an unproven assumption is being treated as fact, which could allow similar front sensor or mounting failures on other vehicles to be written off as external damage instead of being investigated as a potential durability or design issue with the front sensor mounting.

• 12/15/2025· ELECTRICAL SYSTEM,ENGINE

  This has happend twice in the past 2 months, I came to a red light and the auto stop/start engaged automatically. When the light turned green and the vehicle was supposed to engage it turned off completely, all lights on the dash came on and it and wouldn't restart. Had to open the drivers side door and try to restart the vehicle, it restarted after a few tries. Very dangerous intersection I was stuck in. I have informed Acura of both occasions, they tested the battery cells and confirmed the battery was okay, was told this is a "known" issue with no resolve.

• 12/05/2025· ELECTRICAL SYSTEM,ENGINE,FORWARD COLLISION AVOIDANCE

  i purchased the vehicle March of 2025. Since I have been to the dealership on multiple occasions. I was there less than a week after purchase because there was a noise coming from the front tire the dealership balanced the tire. The noise was still there so i returned and the next time they replaced the front wheel bearings. I still have issues with the steering wheel shaking so they replaced all 4 tires. The problem still persists but they don’t know why. the car feels unsafe to drive especially on the highway and in rain. i have had the recall for the brake pin assembly addressed and fixed. I also have issues with the audio shutting off or not responding the dealer did a hard reset and an update to the software that has not resolved the issue. The car would turn off at random times and struggle to turn back on when the idle shut off was activated. the dealer replaced the starter. i have had issues with the car randomly braking when there is nothing in front of me and other safety features either not working at all or working when not needed. dealer advised it was a faulty battery and replaced it. I currently am still having shaking with loud noises especially at higher speed. The engine is very hesitant when accelerating and i struggle to merge onto the highway. It is also extremely jerky at lower gears and its most noticeable in stop go traffic. The brakes are squealing already and the mileage is low. I also sometimes need to press the brakes hard to even stop. The screen often goes black or will not connect to anything and i am unable to see directions or hear music. i feel extremely unsafe in this car and have anxiety every time i need to have anyone in the car with me

• 12/03/2025· ENGINE

  The idle-stop function would frequently malfunction. I would be at a stop, which would trigger the idle-stop function and the car would turn off, but when I released my foot off the break in preparation for needing to start moving, the car would stall and shut completely off. There was about a five second delay before I could get the car to turn back on and start moving, which was very scary with traffic all around me. After the malfunction occurred several times, I would try to remember to turn off the idle-stop function using dynamic mode. I called my local Acura dealership about this problem and the service manager said that he wasn’t sure what was wrong nor did he know how to fix it. He advised me to just wait and hope that Acura issues a recall for the issue. Then, I started noticing that there was a delay in my vehicle starting when pressing the start button. It wasn’t too long of a delay but enough for me to notice. Since the car would ultimately start, I didn’t think too much about it, until my car failed to turn on. It has happened when I turn off my car but then need to turn it back on soon after turning it off. I’ll press the start button and the lights on the dash come on and I can hear the engine trying to turn on but it doesn’t. The engine won’t crank up. I have to let it sit for a few seconds (30 sec?) and then try to turn it on again, at which time I have been lucky that it will turn on, but the initial start-up sounds like a struggle. It doesn’t sound like a healthy start up for 2025 vehicle.

• 11/23/2025· FUEL/PROPULSION SYSTEM

  When the car comes to a stop, the engine will shut down after idling. This is by design. The problem is that the engine shuts off and does not start up again. This is very dangers when turning across traffic. I took the car in for maintenance and they said this is a known issue but there is no fix. The internet has many complaints and some people are having their starters replaced. This problem has occurred in other model years of this car. Please issue a recall and make Acura accountable for this known issue.

• 11/12/2025· ELECTRICAL SYSTEM,ENGINE

  2025 Acura MDX Aspec Advanced - Experienced 3 instances of failure to restart after engine idle shutoff or normal shutoff. Periodically starting the vehicle makes a buzzing or resistance type of sound, but usually will start. 1) 8/8/2025 Returning from shopping turned off vehicle in driveway to open hatch to unload items. Upon re-entering the vehicle (~5 mins) the push start failed to start - engine sounded sluggish first attempt and failed to start. Subsequent button presses just made a clicking sound. Had to fully turn off vehicle and back on and it started. 2) 10/10/2025 Returning from a wedding and getting off the expressway to a traffic light the auto stop/idle stop turned off the engine. Once the light turned green the vehicle failed to restart multiple times. Had to fully turn off vehicle and back on to get it to start 3) 10/30/2025 After parking for shopping, upon returning to the vehicle it failed to start from off. Any subsequent repress of the start button would make a click and starter failed to engage. after turning off vehicle and back on it started Vehicle was taken to dealership and notified of issues - they checked the battery and it was fine, no trouble found.

• 11/11/2025· ELECTRICAL SYSTEM,ENGINE

  When the auto idle stop system is enabled my Acura will shut down completely when the vehicle comes to a complete stop and the idle stop system will not reengage as it should when your foot comes off the brake and the car shuts completely off and goes into park. This has happened 3 times, the last one occurring on a very busy highway, and I'm thankful I wasn't rear ended by the car behind me. Traffic had to go around me which caused quite a hazard pulling out into a fast moving lane. It finally responded, restarted and I was able to move forward. It was taken into the dealership and they weren't able to recreate the occurrence for the short time that they had it (one week). There was no warning prior to failure. I have called Acura Client Relations and they turned it over to their Management team, gave me a case number and I haven't heard from them as of this complaint. Reading your website I see many others having and reporting this same dangerous experience with their 2025 Acura MDX.

• 11/04/2025· ELECTRICAL SYSTEM

  The power and motor on the moonroof and sunshade has failed multiple Times in the first year of owning the car.

• 10/29/2025· ENGINE

  When the automatic engine start/stop is enabled, my car will shut down. To the point where it has to be completely off, then restarted. This has happened twice, the first time was on 9/28/2025 and the second time was on 10/29/2025. We were in traffic, and the car behind me, almost ran into me, as I stalled. the lighted symbols on the dashboard were illuminated during this experience, but I am not sure which ones, as I was in a panicked state given that my child was in the car with me and this almost caused me to get hit by car behind me. I have not had this checked by the dealer yet, but I am scheduling the appointment for as soon as possible.

• 10/21/2025· UNKNOWN OR OTHER,ENGINE

  Car engine sometimes does not restart when the auto start-stop feature is engaged. Car engine is also sluggish to restart when it does work. My local Acura dealer evaluated the car on 10/15/25, found battery was low. Battery was replaced that day, and things seemed okay for about a week. Today (10/21) when I was stopped at a traffic light, the issue returned and my car would not restart after going into auto start-stop. The car had been on for about 30 minutes. When I tried to restart the engine, it took three tries before finally turning over. Fortunately, this has only happened thus far for me at stoplights, but safety could definitely be impacted if the engine does not turn back on and the car needs to be maneuvered quickly. No warning lights or messages appeared prior to the issue. This started for me about 3 weeks ago. No accidents or known issues with the car prior to the issue. There does not seem to be a predictable pattern to the auto start-stop feature failing.

• 10/14/2025· UNKNOWN OR OTHER

  My 2025 Acura MDX randomly turns off when in Auto Stop/Start mode at stoplights and I have to restart it. After it happen twice, my husband took it to the dealer, and they could not find anything wrong with it. It happened a third time and this time the dealer kept it for a week. They found nothing so their system doesn't detect problems well. I had their loaner, a 2025 MDX A-Spec. I was driving the vehicle into a parking space at my office which faces a 4-lane highway. My foot was on the brake, and I was 2/3rds into the space. Suddenly the car lunges forward, revs up and takes off over the curb, over 3 bushes and down a sloped hill into the highway. I could not stop the vehicle! My hands were on the steering wheel and my foot on the brake as I was bracing for impact with another vehicle. Thankfully there were no cars in the lane! As I entered the right lane a car passed by me. The engine then revved down, and I was able to gain control of the car and pull into the parking lot. I have met with the managers at the dealership. They still cannot find what's wrong with my car as the computer doesn't show anything. They have run a test on the loaner car as well and said they could not find any issues with it either. They are calling in an engineer to inspect the loaner car. I or someone else could have been badly injured or killed! I feel the MDX A-Spec I was driving is a deadly vehicle, and I do not want this to happen to anyone else!! There were no warning messages or problems prior to the incidence My hope is that there would be an investigation into this vehicle and into Honda/Acura to see it there is safety issues with their vehicles. The photos are of the area the incident happened. The dealer has the vehicle. Thank you, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

• 09/30/2025· FUEL SYSTEM, GASOLINE

  The contact owns a 2025 Acura MDX. The contact stated that while depressing the accelerator pedal, the vehicle failed to respond as intended, causing the vehicle to decelerate unintendedly. Several unknown warning lights were illuminated. An independent mechanic was contacted. The vehicle was taken to an independent mechanic where it was diagnosed, and determined that the throttle body was damaged and needed to be replaced. The vehicle was not repaired. The manufacturer was notified on the failure and suggested that the vehicle be taken to the dealer for assistance. The approximate failure mileage was 6,000.

• 09/29/2025· UNKNOWN OR OTHER,ENGINE

  During three separate incidents, my vehicle’s engine unexpectedly shut off without warning, twice in the middle of moving traffic and once while idling in a drive-thru when the engine idle stop/start feature was engaged. In each case the vehicle did not immediately restart, leaving me and my family exposed to oncoming traffic and high-speed vehicles, especially once while exiting a highway. The malfunction appears related to the engine’s idle stop/start or fuel/ignition system, but no specific component has been identified; the vehicle remains available for inspection upon request. Although I reported the incidents to the dealership, they stated they could not reproduce the problem and therefore could not repair it. . No warning lamps, error messages, or other visible symptoms appeared before or during any of the shutdowns, the engine simply stopped running, so there was no advance notice before the failures occurred.

• 09/23/2025· ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE

  When driving and the stopping the auto start/stop feature does not rengage and the car places itself in park and becomes disabled and difficult to restart. When driving on a major highway when I was in traffic the car shut down, put itself into park and would not restart upon removing my foot from the brake. It then gave numerous error messages and would not respond to any commands. Traffic started moving and cars were then needing to go around my disabled vehicle. It finally responded to me trying to restart it. We had the car checked the week before it happened due to it being slow to re-engage when the auto start stop would be used. The dealership reported that there was nothing wrong. Brought it back after is was disabled on the highway for 5 minutes and they are still saying there is nothing wrong if they do not see it happen themselves. It is a danger to drive.

• 09/06/2024· SUSPENSION,WHEELS,UNKNOWN OR OTHER

  on 8/24, I purchased an acura mdx 2025 technology package.We drove home from the dealer, my mother heard a rattling noise but thought it was the car seat making the noise.The next day,I heard the noise again,it was coming from the right, rear back,I checked,and saw the wheel liner loose and thought the noise was being cause by a loose liner.My mother said we had to go back to the dealer on 8/31 to pick up the wheel lock and weather mats and we would have them check the liner.As the week went by,the noise was more often.On the way to the dealer, we could hear the noise after every bump or turning right.We gave this information to the dealer,we said we thought it was a loose liner but were not sure anymore as the rattling was more often.We did not feel safe driving home.They provided us a loaner and said they would look into it.On 9/4 they sent a text that the rear sway bar link was faulty, the part was ordered and the car should be ready by Friday.My mom emailed them to ask if by faulty,they meant it was loose or broken,they checked and said it was broken.It was expressed to them that this was concerning because it was a brand new vehicle,that we felt blessed that we decided to leave the car,had we driven back home, God knows what could have happened since a broken link can cause you to lose control and get into an accident.We asked if they would report it to the manufacturer or NHTSA? They did not reply. But text a day after stating that we must have gone through a pothole at high speed or hit something,and we were liable for the cost.After my mother sent an email and spoke with them saying that if it was not caused by us,that if the issue was there,was it caused during transporting the car from The manufacturer to the dealer?they said that the car was fixed and there would be no charge but kept insisting that we were at fault,that it happens alot,where people walk out of the dealer and come back with something broken the next day. (more to say but no space)

• 09/04/2026· ENGINE

  I was driving w a passenger on a busy 4 lane road and trying to make a left turn. When I tried to hit the gas after coming to a stop, my car would not move. I did not know what was happening, as it turned out the car had shifted into park and turned off. Extremely dangerous scenario. I had to take my foot off the brake, restart the the car and put it in drive again to move. I brought it to the dealer the following day, they said they fixed it with a gear shield as the trans had dirt in it and a new starter. However, yesterday, prob about 6 or so months later it happened again. I went directly to the dealer. They kept the car over night. Today I was told the my battery charge was too low and the auto idle engine on/off turned off due to it being not having enough charge. Totally different excuse than the first time. Also, when I dropped it off I was told someone else had dropped their 2025 MDX off that same day for the same reason. I am very concerned, worried and nervous when I drive it. It helps if I turn the auto on/off idle stop off, but I must do that every time I start the car as it resets each time the car is turned off. Obviously I forget sometimes. It is a major concern that I feel the dealership is not taking seriously or showing much concern for my safety. Thank you for your help.

• 09/03/2026· ENGINE

  I have a 2025 Acura MDX SH-AWD. Several times while stopped in traffic, the Auto Idle Stop system shut the engine off and the vehicle displayed ‘RESTART ENGINE.’ The vehicle did not restart automatically. I'm concerned that this could cause a safety hazard if it happens in traffic. I want to file a safety complaint.

• 09/01/2026· ELECTRICAL SYSTEM,ENGINE

  When at a red light the engine cuts off and does not restart when foot comes off the brake. Sometimes it takes several minutes to start. We were stuck in an intersection and almost were rear ended. Took it ti the dealership. had a new battery up in. By the time we got home, it did it again. Took it back to the dealership, they replaced the started. No problems for 4 months. Now it is doing the same thing again, along with the air conditioner not cooling. The first time we took it in for oil change we told them it was not cooling and were told there was nothing wrong with it. Took it back this weekend and found out there is a compressor issue. The compressors are not available for repair. Other minor issues are codes are randomly appearing on the gauges and the screen blacks out.

• 09/01/2025· ELECTRICAL SYSTEM,ENGINE

  While driving in traffic, my vehicle suddenly shut down without warning. The engine stalled, and I lost power to steering and braking, creating a serious safety risk for myself and other drivers around me. The problem has occurred more than three time. At the time of the failure, there were no warning lamps a message display showing to continue to drive depress brake pedal and push switch there was no check engine light showing. I had to shut the whole car off open the door and re start the car. The issue has been inspected on 08-13-25 by a acura dealer / mechanic. I was told it was the battery and it was covered under warranty. They found no other issues. The car shut down on me again on 08-19-25 and on 08-30-25 with my family in the car. This unexpected shutdown placed me in danger of a potential collision, and I am concerned that this may indicate a larger defect affecting this vehicle. I can get a receipt from the acura service department if needed.

• 08/30/2026· POWER TRAIN,ELECTRICAL SYSTEM

  The auto shutoff and restart system has failed multiple times causing the car to shutoff in the middle of traffic. This has happened in traffic on the interstate, on surface streets and in the drive thru line. Safety was put at risk as had to restart car in middle of traffic multiple times; once car would not restart at stop light. This could have caused an accident as vehicle was at a full stop with cars coming up from behind in the road. Dealer has replaced starter and relay twice. In less than 2 years, I'm on my third starter. Dealer has inspected vehicle multiple times. No warning messages or other symptoms before occurring. When the engine would not restart at intersection, warning message of "transmission system problem, apply parking brake when parked. See your dealer" Could not restart engine.

• 08/29/2026· UNKNOWN OR OTHER

  My 2025 Acura MDX has 21,000+ miles on it and the START STOP SYSTEM has stalled and failed to restart the engine at RED LIGHTS several times. This is a SERIOUS SAFETY CONCERN! Does Honda/Acura have a Technical Service Bulletin for this issue? Reading many other complaints on social media many people are looking for ways to electrically circumvent the Start Stop System but that voids the manufactuers warranty. I need help solving this problem through HONDA/ACURA the right way. Please help?

• 08/29/2025· UNKNOWN OR OTHER

  This is a known issue with Acura that they have not addressed. The software cannot be updated due to a flaw in their design. The dealerships cannot even update the software since it is designed to only be updated via a WiFi connection, which does not work. This is critical, because the 2025 MDX is actually a major departure from prior years in how the brakes and other functions operate. When I brake, it is very rough and uneven and the engine revs and surges the vehicle forward. Only a software update could possibly fix this, but this is not possible, due to the lack of any access to the car's electronics. Quite frankly, Acura marketed this vehicle to be vastly superior to prior year models, but they cut out various features (including a hard wire connection to the electronics).

• 08/27/2025· ENGINE,FUEL/PROPULSION SYSTEM

  Idle stop causing engine to shut down. This has happened three times! It’s very dangerous.

• 08/26/2026· UNKNOWN OR OTHER,ENGINE

  Idle Auto Start/Stop will not restart after cutting on leaving me stranded in traffic.

• 08/25/2026· POWER TRAIN,ELECTRICAL SYSTEM,ENGINE

  My 2025 Acura MDX suffers from a severe safety defect regarding the Auto Idle Stop (auto start-stop) system. When the vehicle comes to a complete stop at intersections or traffic lights, the engine shuts off as intended. However, upon releasing the brake pedal to accelerate, the engine completely fails to auto-restart.Instead of restarting, the vehicle drops out of the auto-restart sequence entirely, shifts itself out of drive, and displays a critical safety message on the dashboard: "To start engine: Brake + Push".This completely strands the vehicle in live traffic, forcing me to manually shift into Park, press the foot brake, and push the engine start button while traffic accumulates behind me. This creates an immediate rear-end collision hazard.The dealership has already attempted to diagnose and repair this issue under warranty by replacing both the vehicle's battery. This hardware replacement did not fix the problem; the failure continues to occur unpredictably less than a week (and 25 miles) after replacement. The root cause appears to be a software, Powertrain Control Module (PCM), or sensor tracking defect where the vehicle fails to recognize it is in an automated restart sequence.I am filing this complaint to be officially included in the ongoing NHTSA Engineering Analysis EA25004 regarding Honda/Acura Auto Idle Stop failures, as the current hardware recall remedies are entirely ineffective for the 2025 model year.

• 08/25/2026· UNKNOWN OR OTHER

  I am leasing a 2025 Acura MDX with approximately 16,000 miles, acquired new in June 2025. The A/C system has failed and only blows hot air. The vehicle is available for inspection. I first noticed reduced cooling Thursday evening, August 20, 2026. By Friday, August 21, when it was approximately 89°F, the A/C was no longer producing cold air. I restarted the vehicle twice and repeatedly turned the climate controls and A/C on and off, but only hot air came from the vents. No warning lights or messages appeared. I contacted Cerritos Acura on Friday and spoke with the Service Director. I explained the failure, but the earliest appointment offered was approximately a week and a half later. I asked if they could arrange service elsewhere or contact another Acura dealer for an earlier appointment, but both requests were declined. On Monday, August 24, I had to commute approximately two hours to work without A/C during heat advisory conditions. I became extremely overheated and was concerned I was approaching a heat-related medical emergency. I consider this a serious safety concern, especially for a nearly new vehicle. The problem has not yet been diagnosed because the dealer has not inspected the vehicle.

• 08/21/2026· ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE

  2025 Acura MDX – Auto Idle Stop Failure to Restart When my 2025 Acura MDX is stopped at a traffic light and the Auto Idle Stop system activates, the engine shuts off but on multiple occasions has failed to restart when traffic begins moving. The vehicle becomes immobilized in an active traffic lane. Vehicles behind me begin moving and honking while I am unable to move the vehicle. To regain operation, I have had to completely shut the vehicle off and restart it while stopped in traffic. I can prevent the occurrence by manually disabling Auto Idle Stop after starting the vehicle, but this requires me to remember to disable the system every time I drive. If I forget, I risk the vehicle shutting down and failing to restart at an intersection. This creates a serious safety concern for me and my passengers, including my child. I am concerned about being stranded in an intersection or other active traffic lane and potentially being struck by another vehicle. I believe the Auto Idle Stop system's failure to restart the engine presents an unreasonable safety risk and should be investigated.

• 08/20/2026· ELECTRICAL SYSTEM

  The contact owns a 2025 Acura MDX. The contact stated that while at a stop, the vehicle lost automotive power, and all electrical features turned off. The vehicle was restarted and the battery warning light illuminated. The contact continued to drive the vehicle. The vehicle was taken to a local dealer where it was diagnosed, and the contact was informed that no cause for the failure was found. The contact stated that upon starting the vehicle, the vehicle was idling roughly. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 17,400.

• 08/17/2026· ENGINE

  The vehicle intermittently fails to restart after the Auto Idle Stop system shuts the engine off at a traffic stop. When this occurs, the vehicle remains disabled until it is manually restarted. This has now happened repeatedly, including twice within one recent week. The vehicle was purchased new on November 27, 2024, and currently has approximately 27,500 miles. The repair history for this same issue is: •September 19, 2025 — 13,841 miles: Battery replaced. •January 27, 2026 — 18,481 miles: Battery replaced again. •February 4, 2026 — 18,814 miles: Starter replaced. •August 14, 2026 — approximately 27,500 miles: Vehicle returned again for the same continuing problem. Diagnostics were performed, but no repair or resolution was provided. Despite replacement of two batteries and the starter, the defect continues. Our most recent experience with the dealership was particularly concerning. We were essentially told that they could not identify the problem and could not provide any further solution. That is not an acceptable outcome for a vehicle that can shut itself off while stopped in traffic and then fail to restart.

• 08/15/2026· ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM

  After an auto idle stop at a major intersection, car failed to restart automatically and was left stranded unable to restart the car. Car would not shut off or turn back on when using the power button and with foot on brake but had power but it was in limp mode - transmission warnings flashed and the D "for drive" on the screen at the drivers location. I called tripleA however before they showed up I was able to put the parking brake on and turn the car off and on ad it reset. This is similar to the issue was happening with my 2017 Honda Pilot where it would stall and not restart after the auto idle stop engaged. Very dangerous and difficult to troubleshoot when in that situation, surprised that this is still happening in Honda manufactured cars - this is very dangerous and needs to be addressed and investigated.

• 08/15/2026· STEERING,SERVICE BRAKES,FORWARD COLLISION AVOIDANCECrash

  Hello! I am writing to report an urgent and serious safety failure involving my 2025 Acura MDX A-Spec and to request immediate investigation and action. The vehicle’s driver-assist systems - specifically the lane departure warning and forward collision warning - failed to operate. In addition, both the steering wheel and the accelerator became stuck, causing my vehicle to collide head‑on with oncoming traffic. These failures placed my life and the lives of others in immediate danger. I previously opened a case with Acura Contact and Client Relations (Case #16550271). To investigate my vehicle failures that caused this major accident, the response I received was inadequate and deeply concerning. During my conversation with Acura representatives, I was told verbally without any willingness to provide this statement in writing that Acura “has nothing to do with inspecting their own car.” Instead, I was instructed to have my vehicle inspected by my insurance company, despite the fact that they are not certified to evaluate Acura safety systems and do not possess the diagnostic equipment required to assess failures of this nature. Given the severity of the malfunction and the resulting collision, I am requesting that Acura immediately arrange a proper inspection by qualified Acura technicians and provide a written explanation of how such critical safety and control systems could fail simultaneously.

• 08/15/2026· UNKNOWN OR OTHER

  The auto start stop shut down the car when stopping at a red light and had to fully restart the car. This has happend several times since I owned the car. Its a safety issue is you need to move the car in an emergency or potential to reended by traffice behind you that assumes you are moving at a light. In addition on restart of the car at times the car struggles to restart like the battery is weak or starter is bad. Again more of a safety issue and potential accident.

• 08/14/2026· ENGINE

  The automatic engine shutoff turned off the engine three times at stop lights and failed to restart. We were left stranded in the middle of the road, cars zipping by us fast. We felt very much at risk of being hit.

• 08/13/2026· ENGINE

  My vehicle is equipped with the auto stop, idle/start feature. I have had my vehicle completely shut off at least 6 times when I am at a complete stop. I have researched this problem among 2025 Acura MDX owners and it seems to be a recurring problem. The feature is suppose to save gas when I am at a stop and shut down the engine and then restart when I press the gas pedal but that is not happening.

• 08/12/2026· ELECTRICAL SYSTEM

  The contact owns a 2025 Acura MDX. The contact stated that while the vehicle was stopped at a stoplight, the START/STOP system failed to operate as designed and the vehicle turned off unintendedly. The vehicle was restarted to continue driving. The vehicle was taken to the dealer, who replaced the starter and battery, and other unknown parts were also replaced. The failure reoccurred once while idling in stop-and-go traffic on the highway. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure, and a case was opened. The failure mileage was approximately 11,000.

• 08/12/2026· ENGINE

  I am reporting a safety issue with my 2025 Acura MDX involving the Auto Idle Stop/Start system. When the vehicle comes to a stop and the Auto Idle Stop system shuts the engine off, the engine does not always restart as it is supposed to. When this occurs, pressing the START/STOP button does not immediately restart the vehicle. This has left me unable to move the vehicle normally after the engine shuts off and creates a serious safety concern, particularly when stopped in traffic or at an intersection. I have reported this problem to my Acura dealership numerous times. I have been told that Acura is aware of the issue but has not developed a solution. Despite my repeated complaints, the problem remains unresolved. My vehicle currently has approximately 22,000 miles. I am concerned that the vehicle may fail to restart after Auto Idle Stop activates and leave me stranded in an active traffic lane or intersection, creating a risk of a collision. I am requesting that NHTSA document and investigate this safety issue involving the 2025 Acura MDX.

• 08/10/2026· UNKNOWN OR OTHER,ENGINE,FUEL/PROPULSION SYSTEM

  My vehicle was stopped at a busy intersection, idling in the automatic stop mode. When my husband moved his foot from the brake to the accelerator, the car stalled, orange alarm alerts went off, and the car was completely dead and stalled without power. The car needed to be restarted, and it took a few attempts to accomplish that task. I have had the same problem before with this car and have had it into the dealer at least two times without resolution.

• 08/08/2026· ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE

  Auto Idle Restart failed three times in traffic at red light. Have to shift to Park and push Start button. Nothing happens for several seconds, then engine starts.

• 08/06/2026· ELECTRICAL SYSTEM,ENGINE

  The contact owns a 2025 Acura MDX. The contact stated that while at a complete stop at a traffic light, the vehicle unexpectedly shut off and failed to restart. After approximately 15 minutes, the vehicle restarted, and the contact drove into a parking lot before driving to the residence. No warning lights illuminated. The dealer was notified of the failure the following day, and a service appointment was scheduled. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 14,000.

• 08/06/2025· POWER TRAIN,ENGINE

  The auto start/stop system failed to restart at a stop light. This was an issue on the older MDX and TLX vehicles with the 3.5L V6 which resulted in a large recall. The recall has not been extended to cover the 2025 MDX and the dealership is refusing to fix the issue or acknowledge it despite having a video to prove it occurred. Acura is knowingly selling these vehicles with a dangerous safety defect that will occur at random. Please consider investigating this matter further as I am concerned for my safety and the safety of my passengers.

• 08/02/2026· UNKNOWN OR OTHER

  While at a stop light, the vehicle had automatic start/stop on and failed to restart when the gas pedal was applied. The car went into park but still seemed like it was on, even though it was not. I had to remain calm, put on my hazards, and attempt a couple of times to reboot the vehicle. This has happened at least three times since I purchased my 2025 Acura MDX in November 2025.

• 07/31/2026· ELECTRICAL SYSTEM,ENGINE

  I am writing to formally report a serious and recurring safety defect with my 2025 Acura MDX A-Spec (VIN [XXX]) involving the Auto Idle Stop system. The engine repeatedly fails to restart after the Auto Idle Stop feature shuts it off. When my wife releases the brake pedal (for example, at a traffic light), the vehicle either stalls completely or experiences a major delay before restarting sometimes lasting more than 20 seconds, leaving the my wife unable to accelerate. This creates an immediate and unacceptable safety hazard, particularly in intersections or heavy traffic. I previously brought the vehicle to Acura of Langley regarding this exact issue. Despite that visit, the problem has continued. Most recently, on today, while my wife was driving with my kids, the vehicle again entered Auto Idle Stop at a traffic light. When the light turned green, the engine completely shut off and would not restart for more than 20 seconds. This left her stranded in traffic and unable to move the vehicle, creating a clear risk of collision. This is not an isolated complaint. The National Highway Traffic Safety Administration (NHTSA) has opened Engineering Analysis EA25004 into precisely this condition “No Restart After Auto Start/Stop Engages” affecting, among other models, 2016–2025 Acura MDX vehicles. American Honda has also issued dealer communications specifically seeking 2023–2025 MDX vehicles with client complaints of no auto re-start after Auto Idle Stop for inspection prior to any repair attempts. Class-action investigations and prior litigation involving related Idle Stop failures further underscore the known nature and seriousness of this defect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

• 07/31/2026· ENGINE

  I am submitting this complaint regarding my **2025 Acura MDX**, which I currently lease. The vehicle has an ongoing starting system malfunction that has not been resolved despite multiple service visits. I believe this issue presents a significant safety risk. The primary issue involves the **Auto Idle Stop/Auto Start-Stop system**. When the vehicle automatically shuts off at a red light, stop sign, or while idling, it will occasionally fail to restart when I release the brake or attempt to accelerate. Instead of restarting normally, the vehicle hesitates, stutters, or remains off. This creates a dangerous situation because the vehicle is unexpectedly disabled while in traffic, increasing the risk of being rear-ended or causing an accident. In addition to the Auto Idle Stop issue, the vehicle also has problems during the initial startup. When I attempt to start the vehicle using the push-button ignition, it frequently fails to start on the first attempt. I often have to press the start button a second time before the engine starts, and even then, the engine stutters or hesitates before finally turning over. This should not occur in a brand-new 2025 vehicle. I have taken the vehicle to the dealership multiple times for this issue: * During the first visit, I was told the battery was the cause. * During the second visit, the starter was replaced. * After the problem continued, I returned again. The dealership tested both the battery and the replacement starter and advised that both components were operating properly. * The dealership then opened a case with Honda/Acura engineering for further investigation. Despite these repeated repair attempts, the issue remains unresolved. I have been told that it is likely a software issue and that engineers are "looking into it." In the meantime, I was instructed to simply disable the Auto Idle Stop feature every time I start the vehicle. This is not an acceptable solution. I do have videos but it will now allow me to up

• 07/29/2025· UNKNOWN OR OTHER

  The geniuses at Acura / Honda quit installing SiriusXM in the 2025 MDX and instead relies on the user's cell phone paired to the "radio" to get SiriusXM. My issue is that it cuts out when my cell phone doesn't have a clear view of the SiriusXM satellite. Sometimes it continues when reception improves, but most times I have to reboot the SIrusXM app on my cell phone. This quite dangerous in traffic and definitely is not a safe action. I'm quite ready to change cars because I don't want someone to get hurt because of this design flaw. This has been happening since I bought the car in January but is getting more frequent with the foliage on the trees.

• 07/22/2025· ELECTRICAL SYSTEM,SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

  The car sometimes brakes on its own, and sometimes it brakes more or less than normal. Also, sometimes when I try to turn it on, it struggles to do so.

• 07/21/2026· STEERING,SUSPENSION,STRUCTURE

  The vehicle developed repeated front‑end structural and steering problems shortly after purchase. During normal driving, it produced loud popping, creaking, and clunking noises when turning, entering driveways, or driving over small inclines. Steering felt inconsistent and the front suspension felt unstable. These symptoms created a serious risk of loss of control. A dealer confirmed the problem multiple times and replaced several major components, including the left front strut, the left front lower control arm, and the front shock absorber fork. The most serious finding was cracked welds in the front subframe, requiring the entire subframe to be replaced. A cracked subframe weld is a structural failure that can affect steering stability and crashworthiness. The issues were reproduced and documented by the dealer on multiple visits. The manufacturer’s engineering team was involved due to the severity and difficulty of diagnosis. Despite repeated repairs and extended time out of service, the same steering and suspension symptoms continued, and the vehicle was returned multiple times with ongoing issues. There were no warning lights or messages before the failures. The defects occurred during low‑speed maneuvering and normal driving conditions. The vehicle did not perform like a safe, structurally sound new vehicle, and the repeated structural and steering failures pose a safety risk to occupants and others on the road.

• 07/21/2025· EQUIPMENT,BACK OVER PREVENTION

  The contact owns a 2025 Acura MDX. The contact stated that while shifted into reverse(R), the rear-view camera display failed to function as needed. The contact stated that the vehicle failed to respond while shifted into reverse (R). The contact stated that the failure was intermittent. The contact stated there was no warning light illuminated. The contact had taken the vehicle to a local dealer who was unable to duplicate the failure or determine the cause of the failure. The vehicle was not repaired. The manufacturer was informed of the failure. The contact researched online and related the failure to NHTSA Campaign Number: 25V032000 (Back Over Prevention, Equipment); however, the VIN was not included. The failure mileage was approximately 12,000.

• 07/17/2026· ENGINE

  Four times in 18 months, with the most recent happening last month and today, I was at a stoplight and turned my manual idle off. The light changed and the car would not move despite me stepping on the gas. It told me to restart the car which I did but the first attempt didn’t work to restart. After a few minutes I tried restarting again and it struggled but did. I was very worried as there was a car behind me who thought we were moving with the green light and fortunately he moved to the other lane to avoid a collision as it took me a minute to figure out the car had stopped before putting in my hazards.