Acura MDX Complaints

3,381 consumer complaints on file.

#11757385August 17, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2020 Acura MDX. The contact stated that while driving approximately 35 MPH, there was an abnormal knocking sound coming from the vehicle before the vehicle stalled. The vehicle failed to restart. The maintenance warning light was illuminated. The contact stated that the failure was associated with NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling). The vehicle was towed to the residence. The local dealer was contacted to schedule an appointment, but the vehicle had not been diagnosed or repaired. The manufacturer was not contacted. The approximate failure mileage was 60,541.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757405August 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757168August 15, 2026
POWER TRAIN
Vehicle lost rear traction and leaking fluid from the transmission or front differential. Brought vehicle to dealer. They replaced transmission and transfer case.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757152August 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757151August 15, 2026
FUEL/PROPULSION SYSTEM, ENGINE, ELECTRICAL 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757146August 15, 2026
SERVICE BRAKES, STEERING, FORWARD COLLISION AVOIDANCE: WARNINGS
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.
Crash:
Yes
Fire:
No
Injuries:
4
Deaths:
0
#11756994August 14, 2026
STEERING, POWER TRAIN, ENGINE
Engine turns off while in drive or stopped at a red light/stop sign. It has happened 7-10 times withing the last couple of months, but 3-4 times within the last week. Out of the four times it happened, my family's safety was at risk, because the car was in drive, and could've caused us to get into an accident. During the other occasions, we were moving in reverse and stopped at a stop sign. Complaint was made with Acura of Bay Shore in Long Island, NY, at which time an update of computer engine was performed but issue wasn't fixed due to back-order part that needs to be replaced. Unfortunately, just yesterday (August 13, 2026) car turned off at light causing a road hazard to vehicles and my family stuck in a large intersection. Multiple engine lights turned on, but I was unable to turn the car on or move it. approximately 10 min later, I was able to turn the car on and move it to safe location. I spoke to Acura of Bay Shore, and it is a known issue but till this date, isn't fixed. Vehicle is a hazard and can cause serious bodily harm/or death. thank you
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757014August 14, 2026
ENGINE, ELECTRICAL SYSTEM
The contact owns a 2020 Acura MDX. The contact stated that on six occasions the vehicle stalled and failed to restart immediately. The contact stated that while the idle button was on, the failure occurred. The contact was concerned about being in a crash. The vehicle was taken to the local dealer, where it was diagnosed, and two batteries were replaced, and a software update was performed. The dealer would be checking the software to be sure that it was operating as intended. The manufacturer was contacted, and a case was opened. The manufacturer provided a refund for the battery. The failure mileage was approximately 48,300.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757065August 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757047August 14, 2026
POWER TRAIN
Was driving arround corner and felt a shudder like I had run over something, the felt front tires loosing traction and car jerked into next lane. Took to dealer and they diagnosed a failure of output shaft from transmission to awd transfer case, currently at dealer getting transmission awd assembly replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756689August 13, 2026
FORWARD COLLISION AVOIDANCE: WARNINGS, LANE DEPARTURE: WARNING, BACK OVER PREVENTION: WARNINGS
While driving on a residential street under normal daylight conditions, the forward collision warning and automatic emergency braking system failed without warning. A dashboard message appeared instructing me to clean the windshield and stating that collision avoidance services were unavailable. The windshield was clean and unobstructed. There was no precipitation, glare, or debris. The failure occurred while the vehicle was in motion. I had no indication of whether the vehicle was safe to continue driving or whether I should stop immediately, and no way to know whether the fault was limited to the camera or whether other systems were affected. There was no prior warning, no gradual degradation, and no fault indication before this event. I purchased this vehicle in part for its advanced driver assistance systems and rely on forward collision prevention in daily driving. That protection is now unavailable, and I am driving without a crash avoidance system I was sold and expected to have. I took the vehicle to an authorized dealer for diagnosis. The dealer determined that the forward facing camera module must be replaced and recalibrated, and quoted $2,700. No recall or technical service bulletin was identified. I believe this constitutes a safety defect. A primary crash avoidance system failed spontaneously under normal operating conditions on a vehicle marketed on its safety technology. The repair cost is also high enough that many owners will defer or decline it, leaving vehicles on public roads with disabled collision avoidance. I request that NHTSA investigate the failure rate of this camera module and consider a safety recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756817August 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756581August 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756420August 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756386August 12, 2026
STEERING, ELECTRICAL SYSTEM
While driving at approximately 35 mph on a surface street with my wife and five-year-old son in the vehicle, the electric power steering system failed and steering assist was reduced. The instrument panel simultaneously displayed and cycled through multiple warnings including "Electric Power Steering System Problem — Steering Assist Reduced," "Brake System — Brake Hold System Problem," Vehicle Stability Assist, and Hill Start Assist. There were no warning lamps, messages, or symptoms of any kind prior to this failure; the first indication was the failure itself while the vehicle was in motion. On the two engine starts following the incident, the same dashboard warnings reappeared, although power steering and vehicle operation seemed normal. On the two starts after that, the vehicle started with no warnings and no indication of any problem. So the steering effort increased during the initial failure and I was unable to rely on power assist while moving in traffic, which created a risk of loss of directional control and a crash for my occupants and other road users. On Aug 11,2026, the vehicle was taken to an authorized Acura dealer, which confirmed a stored diagnostic trouble code and diagnosed a failure of the VSA (Vehicle Stability Assist) modulator-control unit, recommending replacement. The vehicle has not been inspected by the manufacturer, police, or an insurance representative. No repairs have been performed to date and the vehicle and component remain available for inspection upon request. Mileage at the time of failure was 40,090. I have video of the instrument panel recorded during the event and it is available upon request. I have reviewed complaints filed with NHTSA describing what appears to be the same simultaneous multi-system failure on 2022 and 2023 Acura MDX vehicles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756323August 11, 2026
POWER TRAIN
The contact owns a 2022 Acura MDX. The contact stated that while driving at an undisclosed speed, there was an abnormally rough grinding sound coming from the vehicle. There was no warning light illuminated. The vehicle was towed to a dealer, but the failure was not duplicated. The vehicle operated normally for a while. The vehicle was taken back to the dealer to be diagnosed. The dealer determined that there was a failure within the transfer case, causing the vehicle to be operable only in Front Wheel Drive. Additionally, there was debris inside the transmission. The vehicle was repaired out of pocket. The manufacturer was notified of the failure. The failure mileage was 80,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756035August 10, 2026
ENGINE, FUEL/PROPULSION SYSTEM, UNKNOWN OR OTHER
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756025August 10, 2026
UNKNOWN OR OTHER, STRUCTURE:BODY, VISIBILITY/WIPER
I am reporting a potential safety defect involving the rear windshield glass on my Acura MDX. The rear windshield unexpectedly shattered while the vehicle was stationary, with no known impact or contact with an outside object. I was present when the glass shattered and immediately took multiple photographs and videos before the vehicle was moved. Based on what I observed, the glass appeared to break outward rather than from an outside object striking the vehicle. I later drove the vehicle from my home to the Acura dealership after being advised to do so. By the time the vehicle was inspected, portions of the shattered glass were understandably missing. The dealership later identified an area of missing glass as a possible “point of impact,” although I witnessed the event and there was no impact. I am submitting this complaint because I am concerned that the rear glass may have failed spontaneously and could represent a safety issue. Unexpected glass shattering could potentially occur while a vehicle is being driven and could startle a driver, expose occupants to broken glass, or impair visibility. I am also aware that Acura has previously issued technical service information regarding rear windshield glass on certain RDX vehicles shattering without external impact. I understand that my vehicle is an MDX and may not be covered by the same issue, but I believe the circumstances warrant documentation and review for a possible pattern.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755732August 9, 2026
LANE DEPARTURE: WARNING, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, FORWARD COLLISION AVOIDANCE: WARNINGS
The car has started with an auto high beam, lane assist, lane departure, crash mitigation, adaptive cruise lights coming on one after the other noting there are issues with the systems and they are disabled. Code is U3000 using a scanner noting Multipurpose Camera Unit Internal Electronic Failure. Sometimes the code will clear, and sometimes not. If it clears an entire drive cycle may be completed just fine, sometimes it pops back up before even moving the car and sometimes during the drive. This is a safety concern as these systems not working or stopping working mid drive and affect safety. The repair for this is not clear and a failure of a safety system should not be occurring on cars without an inmediate and covered fix. The average car on the road is over 12 years old so this failure is occurring on cars well newer than the average car and compromising safety of the driver and surrounding cars especially features intended to prevent crashes that drivers rely heavily on. The fact it can stop working mid drive is a huge hazard since one may be relying on a system and it suddenly fails (like adaptive cruise control) and cause a crash. Please investigate his widespread issue and please fix it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755602August 8, 2026
FORWARD COLLISION AVOIDANCE: WARNINGS, LANE DEPARTURE: WARNING, LANE DEPARTURE: ASSIST
I am reporting repeated failures of the front safety camera / Collision Mitigation Braking System (CMBS) on my 2017 Acura MDX Tech (FWD). The vehicle has experienced intermittent and sudden loss of all ADAS safety functions, including CMBS, Lane Keeping Assist, Adaptive Cruise Control, and Road Departure Mitigation. The failures occur without warning, while driving at normal speeds. The dash displays “Safety Support System Problem,” “Collision Mitigation System Problem,” “Lane Keeping Assist Problem,” and related alerts. When this happens, all forward‑facing safety systems shut down, increasing the risk of collision. The issue is persistent and unpredictable. It has occurred in clear weather, dry roads, and normal driving conditions. The vehicle does not have the Advance package or surround‑view system; this is the standard Tech‑package front camera. Multiple Acura service departments have confirmed the problem is caused by a faulty front monocular camera module (part number 36160‑TZ5‑A36). Acura has superseded this part several times (A63, A64, A65, A66), indicating an ongoing design or reliability issue. Replacement cost is extremely high, and the failure disables federally‑relevant safety systems. This is a safety‑critical component. When the camera fails, the vehicle loses collision‑avoidance capability, lane‑keeping assistance, and adaptive cruise control. The failure happens while the vehicle is in motion, creating a risk of rear‑end collisions or lane‑departure accidents. I am requesting NHTSA review this issue for potential defects in the Acura MDX front safety camera system.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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