2025 Acura MDX engine problems
65 of the 107 complaints owners filed with NHTSA about the 2025 Acura MDX name the engine (NHTSA’s “Engine” heading — the engine and its cooling system). Filed under the same heading: 7 manufacturer bulletins, 1 NHTSA investigation. Every figure below is a document in a federal file, linked; none is a failure rate, and none is a verdict on any one car.
What owners filed about the engine
Source: NHTSA complaint database0 of the 65 reports a crash · 0 a fire · 0 injuries. Self-reported, unverified.
Filed per year: 2025: 13 · 2026: 52
Too few of these complaints carry an odometer reading to say when the problem shows up.
107 complaints in all about the 2025 Acura MDX, 52 filed in 2026. The whole picture, every system →
Counts are owner reports to NHTSA, not verified defects, and scale with how many of these were sold; nothing here is a rate. NHTSA groups complaints coarsely, so “Engine” means the same area of the vehicle, not one fault.
Across model years: Acura MDX engine problems, every year on file →
In owners’ own words
Source: NHTSA complaint databaseFiled with NHTSA by the people who own these cars, about the engine. Quoted as written, with anything identifying removed; unverified reports — what was said, not a finding that it was true.
On several occasions, when the vehicle has been driving and comes to a stop in traffic. the auto start stop kills the engine when the brake is fully depressed. When we take our foot off the brake the engine will not start and a notification is shown on the dash. to start the engine push brake and ignition button.
2025 Acura MDX failed to restart after an auto-idle stop at a light in heavy traffic. Second time this has happened and dealer has not resolved
My 2025 Acura MDX (under 10,000 miles) has failed to restart after the automatic idle stop engaged at stoplights and drive-thru lines at least 7 separate times. When I release the brake, the engine often remains off and the vehicle will not move, leaving me stopped in traffic.
Auto Idle Stop/Auto Start-Stop Issue- On multiple occasions, occurring randomly, the vehicle will not start at stoplights after auto-idle stop is engaged. Sometimes this happens after the vehicle has been running for over an hour. Currently, the vehicle must be completely powered down and then restarted to revive engine
When stopped at a red light on a busy off ramp to a busy highway, the car's engine idle function turned the engine off (as anticipated), but then upon releasing the brake, the car did not turn on. I was stalled in the middle of traffic, which is a significant safety issue.
What is on file about the engine
Source: NHTSA recalls, investigations and manufacturer communicationsNHTSA investigation
- EA25004 No Restart After Auto Start/Stop Engagesopened Mar 26, 2025 · open
- On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject …
7 manufacturer bulletins filed under this heading
- BTI&05122026901 OtherMay 13, 2026
- Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2026 MDXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P0441 (EVAP System Purge Flow Malfunction) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- BTI&04292026901 OtherApr 29, 2026
- Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2026 MDXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P0441 (EVAP System Purge Flow Malfunction) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
The 2 newest are listed; every one is on the model year’s page. Quote the document number at a service desk — it is a diagnosis the maker has already written down.
Trouble codes named on this system
Codes a bulletin or an owner’s complaint about the 2025 Acura MDX names on this model year; a code with a record of its own links it.
Other systems with a record on the 2025 Acura MDX
Source: the same files- electrical problems 50 complaints
Common questions
Source: NHTSA complaint database, recalls and manufacturer communicationsAre engine problems common on the 2025 Acura MDX?
They are documented: NHTSA holds 65 owner complaints naming the engine on this model year (61% of everything owners filed about it), and 7 manufacturer bulletins, 1 NHTSA investigation are filed under the same heading. Whether it is a problem on one particular car is a diagnosis, not a count, and a count says nothing about how many were sold.
Is there a recall for the engine on the 2025 Acura MDX?
No recall campaign is filed under this heading for this model year (there are 4 filed under other headings). A bulletin is not a recall: it carries no federal duty to repair for free.
When do engine problems show up on the 2025 Acura MDX?
Too few of the complaints carry an odometer reading to say. The model year's page shows the mileage curve across every system where it can.
What does NHTSA's "Engine" heading cover?
The engine and its cooling system. Owners choose the heading when they file, so it says which area of the vehicle the complaint is about, not which part failed.