2025 Honda Odyssey Engine Problems

The vehicle continues to shut off its engine at stops and is unable to restart. This has been occurring at an increased rate since I initially reported it last summer. Warnings come on the dash as it struggles to try to restart. Recently it has started to take a full light cycle to get it to restart. I have to turn the vehicle off and wait some time and try restarting it. I’ve notified the dealership ANTRIM HONDA and their service advisor said it’s a known issue but the starters are on national back order and there’s nothing they can do to help.

NHTSA ID

11776494

Incident

Nov 2, 2026

Stopped at intersection and engine cut off due to auto-cutoff feature. When foot was released form brake, the engine failed to restart. It took approximately 30-45 seconds to get the vehicle restarted. Auto engine shutoff feature disabled for remainder of trip with no further issues. We have experienced this in the past as well 2-3 other times.

NHTSA ID

11776469

Incident

Nov 6, 2026

The Auto Idle Stop (AIS) does not work properly and is unsafe. When auto idle engages at a stop light, it is slow to restart, beeps and flashes the battery symbol, and sometimes fails to restart. On a more recent trip, when sitting on a freeway offramp waiting for the light to change with my entire family in the car, the vehicle completely failed to restart after AIS engaged. We were sitting ducks on the freeway and were having difficulties restarting the van. We had to go into Park, Drive, and press the start engine button several times for anything to happen. This issue has been going on for a few months. The battery has been checked and is in good working order, no issues reported. The last battery check occurred today 11/5/2026. I am going to input the date the vehicle completely failed to start, since that time, I have tried to remember to turn off the AIS feature when driving the vehicle. This is a new car and should not be experiencing this incredibly dangerous situation. 2025, Honda Odyssey Elite

NHTSA ID

11775942

Incident

Oct 24, 2026

The 2025 Honda Odyssey I purchased has issues where the car will not start after the "Automatic Start/Stop" feature turns on. What that looks like is when I stopped on the freeway in rush hour traffic, or at a long traffic signal (usually with many, many people behind me on a busy road), my car will stall and not turn on. I have to wait, sometimes minutes, for my car to restart. This is a safety issue because it will stall / I will have to restart at very inappropriate times, like in rush hour traffic on the freeway. It has happened multiple times. No warning lights or messages came on, other than when the car had officially stalled. By that point, there is nothing I can do besides wait for a minute or so and restart car.

NHTSA ID

11775937

Incident

Sep 1, 2026

When auto shut off enables at stop lights, sometimes the car goes into park and seems to turn lff and has an error message. It requires pushing the brake and manually starting the car by hitting the on button. There is risk to a rear end collision since it doesn’t happen until you take your foot off the break to start after stopping so creates risk of a rear collision if cars behind don’t noticed you are stopped. It has happened multiple times and seems to happen even more frequently in eco mode

NHTSA ID

11775528

Incident

Oct 31, 2026

When the auto idle system is forgotten to be not turned off the van will stall. We have had scary incidents where we have stalled at lights and have to restart the van one or more times to get it to drive. There is also problems with the van starting up in the first place. Sometimes when trying to turn on the van it takes a time or two to get it to turn on.

NHTSA ID

11775481

Incident

Sep 9, 2026

I purchased a 2025 Odyssey at the end of August and it is failing to restart and that the local dealer is delaying the process due to "system outages”. The idle stop process is causing my car to stall at stoplights and I must sit there and wait to turn it off and back on again to be able to drive causing traffic backups and a safety hazard to myself. I had it looked at, at the dealership and was told that all starters and relays are on back order and the day I had it there, the diagnostic computer system wasn’t working so it was never hooked up and diagnosed with this problem. I had my 2025 Odyssey at the dealership on October 31st, 2026.

NHTSA ID

11775382

Incident

Oct 1, 2026

The idle/stop function fails frequently at stop lights and stop signs. When it stops the engine it fails to restart and drains the battery. It began occurring very early on with the vehicle I’m guessing around 20,000 miles. I took it to the dealership while it was under warranty and they replaced the battery, and I believe the starter. It seemed to help for awhile but around 40,000 miles it started occurring again. I’ve been lucky to not be rear ended but drivers have had to go around me or sit through a stop light. There are no warning lights. I try to turn off the idle off button every time I start the vehicle. It is very unsafe and no longer under warranty. The dealership seemed like they didn’t know what was causing it last time and they had the van for over a week.

NHTSA ID

11774973

Incident

Oct 29, 2026

Our 2025 honda odyssey stopped running 4 times when stopped at a signal. Took to Hall Honda in Elizabeth city, they said they couldn't find anything wrong. Advised us to "engage a with a circle icon on dash to disengage the system that controls the start-up when stopped. Odd, 2.2 million honda complaints about this same issue. DANGEROUS! Was in a wreck , hit from behind at stop light due to this problem. Almost 8 thousand dollar bill!

NHTSA ID

11774960

Incident

Jan 25, 2025

The Auto Idle Stop system shuts the engine off when the vehicle is stopped, but intermittently fails to restart the engine. The engine does not turn on again until the car is restarted manually. This has happened approximately 10 times. The vehicle is left disabled in traffic until it can be restarted manually. The vehicle has not been seen by a dealer for this issue yet.

NHTSA ID

11774685

Incident

Oct 16, 2026

The contact owns a 2025 Honda Odyssey. The contact stated that while at a complete stop, the Auto START/STOP feature failed to restart the engine after releasing the brake pedal. The contact shifted to the park(P) and opened and closed the front driver’s side door to restart the vehicle. Additionally, during the failure the message "Check Rear Seat" was displayed. The cause of the failure was not yet determined. The local dealer was notified of the failure, and a service appointment was scheduled. The contact was notified of NHTSA Action Number: EA25004 (ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the investigation. The failure mileage was 20,000.

NHTSA ID

11774676

Incident

Oct 30, 2026

Mileage

20,000 mi

The engine fails to restart automatically after shutting off at a complete stop (such as a red light or intersection

NHTSA ID

11774358

Incident

Oct 29, 2026

sometime when the engine auto stops it doesn't start again

NHTSA ID

11774180

Incident

Oct 21, 2026

The vehicle's Auto Idle Stop (AIS) system engaged normally when coming to a complete stop at an intersection, shutting off the engine to save fuel. However, when attempting go through the intersection after the light changed to green, the engine failed to restart automatically. The vehicle completely lost power in an active lane of traffic, creating a safety hazard. The vehicle had to be shifted into park and manually restarted to clear the roadway. This failure appears directly related to NHTSA Engineering Analysis EA25004 regarding Honda/Acura Auto Idle Stop restart failures.

NHTSA ID

11773974

Incident

Sep 18, 2026

When I come to a stop and the auto idle feature is enabled, my car sometimes fails to turn back on, and I am stuck, trying to get my car turned back on. It usually involves me completely turning off my car, opening the car door and then turning the car back on

NHTSA ID

11773839

Incident

Oct 25, 2026

My 2025 Honda Odyssey has repeatedly failed to restart after the Auto-Idle Stop feature automatically shut off the engine while idling in traffic. This is a serious safety hazard that could leave the vehicle disabled in a busy intersection, exposing occupants and nearby motorists to the risk of a potentially catastrophic collision. Despite two starter replacements in October 2025 and October 2026, the problem has occurred multiple times. The authorized Honda dealership acknowledged this is a known issue but stated that no permanent solution is available. No warning messages were observed before the failures. A vehicle that can unexpectedly become inoperable in traffic presents an unacceptable safety risk and warrants urgent investigation and corrective action. Please associate the above statement with EA25-004.

NHTSA ID

11773802

Incident

Oct 22, 2026

We have been experiencing issues with the car stalling while driving. Most recently, the car lost power a few feet into making an unprotected left turn leaving us stranded in the middle of an intersection in a vulnerable position for several minutes. This was deeply unsettling to have happen while making left turn maneuver. It seems to be a failure of the Auto Start/Stop function. After a few persistent trips to the dealer, they have now informed us that this is a known issue, but the parts are on backorder until January 2027. The workaround is turning off the Auto Start/Stop function, but this button does not have an indicator light, is not always confirmed on-screen, and is re-enabled by default EVERY time the car is started. It also appears that others have complained about this issue, and this deserves to be upgraded to a recall. It is unacceptable that a manufacturer would know about an issue with serious safety implications and not notice owners. This could have easily caused a crash and it is happening to others. This specific van is used to transport a disabled family member and outside aides often drive him in this car. We do not feel comfortable with a non-persistent workaround while others are driving this car while we wait for this part. - Auto Start/Stop and Drivetrain, available for inspection - Car stalls during maneuvers after stopping - Problem was reproduced multiple times. Dealer is aware. - Inspected by dealer. - No warnings, messages, or symptoms.

NHTSA ID

11773727

Incident

Sep 14, 2026

The Auto Idle Stop (AIS) on our 2025 Honda Odyssey will cause the van to stall and the engine will not restart. When this happens, our only option is to put the van in park, shut it down and then restart. Sometimes that van has not restarted for almost 90 seconds. We have had it into the Honda dealership three separate times for this issue. The first time they told us the battery was drained so they recharged for over eight hours. The last time they said "the battery fails the load test at this time" so they replaced the battery and stated that the vehicle was "operating as designed at this time." Since the last time we had it in for service (and with a brand new battery), the AIS has failed on us twice. The last time (XXX) it nearly caused an accident on a busy road in Northern Virginia. When it fails to restart the van goes into a default type mode (where most of the service lights turn on or flash and we will have to put the hazard lights on, put the van in park, shut it off and then restart the van. This issue has happened to us about 12 times int he last 8 months. I am very concerned that this will cause an accident at some point and is putting my family's safety at risk. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11773636

Incident

Oct 25, 2026

Engine and vehicle completely turns off when auto start/stop engages when at complete stops.

NHTSA ID

11773530

Incident

Oct 25, 2026

Auto Idle start stop system failed to start vehicle while. We were stopped at a red light auto idle shut down the engine once the light turn green and we attempted to move forward the auto start failed to cycle resulting in a stalled vehicle on the road, potentially increasing risk to passengers and other drivers on the road. This has happened multiple times.

NHTSA ID

11773494

Incident

Oct 25, 2026

When idle start activates at a stoplight sometimes the car will not start when you take your foot off the brake. Car then takes several tries but it will start again. This is a dangerous situation and can lead to accidents. Only seems to happen randomly after the car warms up. Dealer did replace the battery but it did not fix the problem. My guess is the starter does not perform correctly after heat soak in the engine bay.

NHTSA ID

11773441

Incident

Oct 15, 2026

I've had multiple instances where I would be stopped at a red light, when when the light turned green, the car would not accelerate. I would have to turn the engine completely off and back on. This is a safety issue as I'm sitting in traffic and cars/vehicles behind me are expecting me to go. My fear is that someone not be watching my van but the light and accelerate before I am able to move forward. My son, a mechanic, looked at the vehicle. His suggestion was to replace the battery - the vehicle was purchased March 2025, and should be too soon to have to replace the battery. However, when attempting to start it, it sounded like the battery was dying. A couple of weeks after replacing the battery, there had been no issues. I had been driving the vehicle around 20 minutes, most of that at highway speed (80MPH on the toll road). I was idling at a red light. When the light turned green, the vehicle would not come out of the idle mode. I could NOT switch from drive to park. I could NOT turn off the engine. I sat in the road for a minute and a half to 2 minutes (as I sat through an entire light cycle) before the van would finally allow me to turn off the engine and turn it back on. There was no warning, messages or other issues prior to this happening.

NHTSA ID

11772867

Incident

Oct 21, 2026

The auto start-stop system fails frequently. If I do not turn off the system, when I stop on red light, the engine turns off as expected. However, it frequently fails to start. The car stalls and it's difficult to turn back on. I need to turn the car off completely first, then try to turn it back on. This usually takes 10-20 seconds. The situation presents a safely hazard as I'm not able to continue to drive through an intersection on a green light. I took the car to dealer 3 times. They were not able to reproduce he issue nor find the cause of the problem

NHTSA ID

11772279

Incident

Oct 19, 2026

Vehicle was at a stop light and engine turned off via the automatic idle engine stop. However, when I tried to press the gas the vehicle put itself in park and flashed a battery warning. I had to restart the car 4 times before it would turn back on and drive.

NHTSA ID

11771974

Incident

Oct 18, 2026

Start/stop function failed. After stopping at a red light the start/stop function turned off the engine. After lifting off the brake, the engine died when attempting restart. This required turning the vehicle completely off and back on to continue driving.

NHTSA ID

11771617

Incident

Oct 11, 2026