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)

• 09/01/2025· 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.

• 08/29/2025· 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.

• 08/06/2025· 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.

• 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.

• 07/17/2025· TIRES

  Tires have 3k miles . For the past 2 weeks, we have had a slow leak. Must refill air every 3 days. Spent one day at Tire Kingdom, but they could not detect anything. Then the Acura Dealer says there is a leak, but can't find it. We have no choice but to purchase a new tire. This is wrong - th I am retired on a fixed income and must buy a tire for a 3-month-old vehicle!

• 07/16/2026· UNKNOWN OR OTHER

  The vehicle will turn off when it comes to a stop without being put in park. This has happened on busy city roads, highways in traffic and residential areas at stop signs. The vehicle will also periodically not turn on, with multiple indicators lighting up on the dashboard. This has been reported to the dealership, who states if there are no active error codes or indicators at the time of service there is nothing they can do. I have opened a case with Acura client relations more than 3 weeks ago and have escalated multiple times with no response. This has created numerous safety problems, also with children in the vehicle. This vehicle is not safe to operate and the manufacturer refuses to respond to my intervention requests although it is under warranty.

• 07/13/2026· ENGINE

  I had driven 1.5 hours of highway driving. Exited highway and at the first stop light the car stalled on a busy four lane road. I have had the recall software update. Took a minute or 2 to get the car restarted

• 07/10/2026· ELECTRICAL SYSTEM

  Auto start-stop system stalled car at a light, could not turn car off after multiple tries following instructions on dash, but ultimately finally turned off, and then struggled to turn back on, all while on a busy road during rush hour.

• 07/07/2026· ELECTRICAL SYSTEM,ENGINE

  I was stopped at a red stop light waiting to turn left when my 2025 Acura MDX engine auto-stopped per the auto-stop feature. When the light turned green, I removed my foot from the brake and pressed the gas. The engine did not auto-start and displayed a message on the dash telling me to depress the brake and press the ignition button to continue driving. I did this several times, each time the dash would go black for a few seconds then come back up with the same message. Eventually, after getting the car to completely turn off, waiting 30 seconds, and restarting it, I was able to get the engine to start. While all of this was happening, I was passed unsafely by several angry drivers who were behind me, including one who tried to cut around me after I was able to get the car restarted, nearly clipping the front-right corner of my vehicle. I have an appointment with the dealer to have the issue investigated, but the appointment is not for another week. There was no indication of trouble prior to the first time this occurred. We have had this issue at least three times in the past week.

• 07/01/2026· ENGINE

  On June 9, 2026, my 2025 Acura MDX, with only 9,139 miles, stalled at a red traffic light after the Auto Idle Stop feature activated. The engine would not restart, leaving the vehicle disabled in an active traffic lane. I was unable to shift the vehicle out of Park and was stranded for approximately 5 to 10 minutes with my two young children in the back seat. The dashboard instructed me to fully depress the brake pedal and press the ENGINE START/STOP button to restart the vehicle, but repeatedly following those instructions did not restart the engine. There were no warning lights or other symptoms before the incident. I feared another vehicle would rear-end us because I could not move the vehicle out of the travel lane. After multiple attempts to turn the vehicle off and back on, it eventually restarted, allowing me to drive home. The vehicle was towed to the Acura dealership on June 10, 2026. The dealership inspected the vehicle, diagnosed a failed starter, and told me the failure was caused by the Auto Idle Stop feature. The starter was replaced, and I was instructed to disable the Auto Idle Stop feature every time I start the vehicle to help prevent the problem from happening again. The dealership has records of the repair, and the vehicle is available for inspection upon request.

• 06/30/2026· ENGINE

  The contact owns a 2025 Acura MDX. The contact stated that while stopped at a red light, the vehicle suddenly lost automotive power. The message, "Transmission System Failure - Apply Parking Brake while Parked - See Dealer," was displayed. The gear shifter indicator warning light was occasionally illuminated. The contact stated that while attempting to use the Push-To-Start feature to start the vehicle, the engine hesitated while turning over. The vehicle was taken to a local dealer and was diagnosed with starter failure. The vehicle was repaired under warranty. The manufacturer was not made aware of the failure. The failure mileage was approximately 10,000.

• 06/29/2026· UNKNOWN OR OTHER

  Idle stop not functioning properly. Will get to a stop, and numerous times it will not start back up until you put it in park and restart it several times. Sometimes, it will not start on the 1st try from a cold start, or the starter will grind really slow. We have taken this to Acura several times, and they tell us it is a known problem, but just to turn the idle stop off each time.

• 06/28/2026· POWER TRAIN,UNKNOWN OR OTHER,ENGINE

  No restart after auto idle stop - Car fails to restart automatically after stop and releasing the brake pedal. This has happened on a number of occasions in the last few months.This can cause a dangerous condition that can can cause an accident if stopped in an intersection or a rear end collision as the driver behind assumes the vehicle will move but does not. Car has to be shut off to restart.

• 06/26/2026· ELECTRICAL SYSTEM,ENGINE

  2025 Acura MDX will turn off with the auto on/off feature at red light but has had issue several times with turning back on. The car turns completely off and have to push start button to turn back on. On one occasion the same issue happened but would not immediately start with the push start again.

• 06/23/2026· SERVICE BRAKES

  Brakes are too soft . Hard to bring the car to a halt without crashing unless you are at very long distance . Brakes engage at a very low level . Dealer says everything is OK and can't do anything about it . Car is dangerous to drive.

• 06/21/2026· ENGINE,FUEL/PROPULSION SYSTEM

  Randomly when auto/start stop feature engages and shuts down the engine when I let go off the brake the engine doesn't restart and a system problem message show up on the dash. Have to shut down the car and restart for the engine to start running again.

• 06/02/2026· UNKNOWN OR OTHER

  The Auto Start/Stop system shuts down the engine and periodically the engine fails to restart. The car needs to be put into Park and then the electronics seem to re-boot before the car will restart the engine. This has now happened many times in city traffic, interstate highways and in areas of questionable safety (high crime zones). The dealer and Acura has refused to repair since they have not been able to duplicate the issue. They wanted me to lend my new $60,000 car to their service technician to drive back and forth from home/work to see if they can duplicate the issue. The dealer has tested the battery, however it passes. They refuse to do anything with the starter or other components of the system whether it be replace or inspect them. As the car ages (now approx. 1.5 years) it seems to occur increasingly often. I am concerned that the Auto Star/Stop system is doing irreparable damage to the engine & transmission. Additionally, sometimes the engine gets cut off and then tries to re-start and after several churns the engine restarts and the car lurches forward as the car is in gear "drive' when the car re-starts. The catalyst for making the car re-start is to release the brake... and that causes an immediate lurch forward when the engine does re-start. Does not seem to be a good thing for the transmission. The Auto/Start/Stop engine feature can not be permanently disabled.

• 05/22/2026· ENGINE,FUEL/PROPULSION SYSTEM

  My Vehicle is having an issue with the idle stop feature. Multiple times when stopped at a red light or when idle the car stops and will not turn back on. I have to turn the car off completely open the door to simulate leaving the car, wait a minute then start the car again to be able to move.

• 05/21/2025· AIR BAGS,FORWARD COLLISION AVOIDANCECrash

  (1) My airbag's did not deploy when an another car drove into the front of my car causing extensive damage. It has been deemed a total loss by Liberty Mutual (claim #[XXX]) and will be towed in a day or two to their salvage yard from the auto body shop. (2) Based on what I was told by the claim adjuster, body shop and police they didn't understand why they didn't deploy, especially since one of the air bag sensors was directly in front of the impact. (3) No - Acura has not been easy to communicate with and assigned me a case #[XXX] but after I answered their questions by email a few days ago they have stopped communicating with me. (4) The car has been inspected by the body shop and Liberty Mutual. (5) No INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

• 05/20/2026· ELECTRICAL SYSTEM,ENGINE

  the car shuts off at a red light, fails to auto-restart, forces the car into Park, and requires a full manual reboot or jumpstart while stuck in moving traffic. It also struggles to turn on at times mimicking a drained battery. I am needing to deactivate the auto start/stop feature in order for the vehicle to properly function. Vehicle will not start when parked at times.

• 05/18/2026· ELECTRICAL SYSTEM,ENGINE

  Description of Incident: While stopped at a red light at a busy intersection near a shopping district, the vehicle's Auto Idle Stop (AIS) system engaged and shut off the engine. When I attempted to restart by pressing the brake pedal — as instructed — the vehicle failed to restart. The dashboard displayed an error message reading "Idle Stop Function: Press Brake to Restart." My foot was on the brake pedal at the time; pressing it did not restart the engine. I then manually shut off the vehicle using the Engine Start/Stop button and attempted to restart it. The vehicle would not start. I remained stranded at the intersection for approximately 10 minutes. I had to call the cops for a patrol car because other cars were piling up behind me and I had my 6 month old son in the vehicle. Safety Impact: During this time, I was unable to move the vehicle from a live traffic intersection. This created an immediate safety hazard to myself, my family, and other drivers.

• 05/18/2026· ENGINE

  While stopped at a red light at a busy intersection near an airport, the vehicle's Auto Idle Stop (AIS) system engaged and shut off the engine. When I attempted to restart by pressing the brake pedal — as instructed — the vehicle failed to restart. The dashboard displayed an error message reading "Idle Stop Function: Press Brake to Restart." My foot was on the brake pedal at the time; pressing it did not restart the engine. I then manually shut off the vehicle using the Engine Start/Stop button and attempted to restart it. The vehicle would not start. I remained stranded at the intersection for approximately 10 minutes before the vehicle finally restarted and allowed me to shift into Drive. I was the first car in the lane, so people kept piling up and honking behind me.

• 05/13/2026· ELECTRICAL SYSTEM,ENGINE

  The auto idle stop feature will kick in at red lights, shutting the engine down. However, every approximate 1 out of 10 times the engine and electrical system fully shut down when I try to start the car moving again. The car can then not be restarted for close to a minute. This results in not being able to move when the light turns green and is dangerous is heavy traffic areas.

• 05/10/2026· ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM

  Car engine turns off at a red light, by turn off I mean completely turned off, not just silent. And takes a couple of attempts to restart the car before the engine turns on again. This has happened over 5 or 6 times over the last 3 months, however yesterday (May 9, 2026) it happened twice within the hour. Luckily, I have not been involved in an accident because of this, but I'm concerned that it's easy to imagine a scenario where someone will be rear-ended. Please issue a safety recall for Acura to fix this issue.

• 05/04/2026· ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM

  While stopped at a traffic light, the vehicle had auto shut off normally. However when I released the brake and pushed the gas it unexpectedly stalled and shut off without warning. When attempting to restart the vehicle, it would not start again. There were no prior warning indicators or messages suggesting an imminent issue. This created a hazardous situation as the vehicle was disabled in an active traffic lane. After several attempts, the vehicle either restarted after having set the emergency brake. The failure appears to be sudden and without driver input, raising concerns about reliability and safety in traffic conditions.

• 05/04/2026· ELECTRICAL SYSTEM,ENGINE,LANE DEPARTURE

  Engine stalls when at intersection and the engine cuts off at idle and fails to start back up when you remove your foot from the break. Can have keep lane assist enable. KLAS mode narrow, you have to fight the wheel to maintain control of the vehicle, formal mode is a 50/50 chance it works, wide you can sift right off the road for 5-10 secs before to realize your off the road. Steer wheel control button intermittently fail and stop being able to control the midi instrument panel and infotainment system. I believe there is a systematic electrical issue in the car. They attempted to fix this by replacing a starter which hasn’t because the engine stalled at an intersection again and on cold start this morning 5/4 at the same intersection as this is by my girlfriends apartment.

• 05/04/2026· ELECTRICAL SYSTEM,ENGINE

  Last year, my 2025 Acura MDX was repaired under warranty for a known starter issue that is affecting all 2025+ MDX models. The issue is that the vehicle will stall or fail to start on random occasions leaving drivers stranded or stopped in traffic unable to move their vehicle. Honda and Acura are well aware of the fact that this is an issue, yet they continue to produce these vehicles with the same parts. This repair took several attempts and the dealership refused to even diagnose the issue for several months causing me to have to record each instance on my phone for proof. Once they eventually replaced the starter, the issue went away for approximately 10 months. Today, however, I was temporarily left stranded at a gas pump as my vehicle would not start. Honda and Acura dealerships are replacing these parts with the exact same part number, so the no-start condition comes back in about a year or less. It is incredibly dangerous to have a vehicle that you cannot move as anticipated, or if you’re in an area that you cannot leave or get away from potential danger because your vehicle won’t start. This is a less-than two-year-old vehicle that has now left me stranded on several occasions including in the middle of traffic on a motorway. I know for a fact that several other owners of the Acura MDX are having the exact same issue and ask that you please launch an investigation into this as Honda is well aware of it and still refuses to address the blatant safety risk it poses to its customers.

• 05/03/2026· ELECTRICAL SYSTEM,ENGINE

  Vehicle is equipped with start stop system and we have had multiple instances where we come to a stop , and the car will not restart. In the latest instance, we pulled up to stoplight, the start stops system engaged shutting off the engine then wouldn't restart. Car also wouldn't turn completely off, so I had to hit the flashers at the busy intersection, try to get the car into park, then shut completely down, then restart the car. It also struggled to restart as if the battery was dying. In this instance most dash lights come on, but it appears to be an engine, electrical, and software issue. The vehicle has been inspected by the dealer multiple times, and in once instance they said the issue was caused by a bad battery, mind you the car is slightly over a year old. This latest time, they claimed that the battery was good and no issues were found. This issue continues to put me and my family at risk by leaving us disabled in the middle of traffic especially when it has happened near exiting the freeway,