2025 Honda Odyssey Engine Problems

Numerous times since purchasing my van it has failed to start. At first it was just random at a stop light when I would forget to turn off the idle stop. Leaving me stuck at stop lights with a vehicle that won't turn on without multiple attempts. More recently it struggles to start after stopping to run errands or get gas or in drive thru lines. Having to depress the break pedal to the floor (much further than needed to even stop the car) and press and hold the on/off button while it chugs and attempts to start. The issue was able to be recreated by the dealer and they indicate that it is a starter issue but the part is on back order. Upon further discussion it appears that this isn't an unknown issue and that there is a current investigation into this issue. However, the service manager indicated to me that this isn't common and this was a "one off" incident.

NHTSA ID

11756239

Incident

Aug 8, 2026

Auto idle/stop system engages while sitting at a traffic signal as designed. When attempting to proceed, the engine fails to restart and all electrical components completely shut off for several minutes. All components stop working (information screen, gauges, hazard lights, and door locks are non-functional) and the vehicle is unable to turn on for several minutes. This creates an unreasonable safety risk for the occupants of the vehicle and for surrounding motorists when this failure occurs in active traffic lanes as the vehicle when it is reasonably expected for the vehicle to resume propulsion and with no ability to turn on hazard lights to warn approaching motorists of the vehicle's disabled status. The failure of the door locks during the event traps the occupants inside the vehicle, which we are in Florida so, hot summer days the internal temperatures can reach deadly levels within minutes with no way to escape. The vehicle was initially inspected by a manufacturer authorized dealer service department on 7/8/25 and the issue was dismissed. The vehicle was again inspected on 7/30/25 by the same service department and confirmed. A starter motor assembly and relays were replaced by the dealership and the vehicle returned to use on 8/4/25. Again, on 8/5/26 the vehicle exhibited the same safety defect while in an active traffic lane. The vehicle was returned to the same service department on 8/6/26 where it remains as the date of this report with no communication on resolution for the problem from the manufacturer. There were no warning lights or messages prior to the failure.

NHTSA ID

11756215

Incident

Aug 5, 2026

UNKNOWN, while driving when I was waiting at the signal (waiting for green signal to move) my vehicle automatically shifting from direct to park gear.Once shift to park then no other gears/buttons do not work, only I can turn off the vehicle and restart then all gears/buttons work to move on. This safety issue happened three times (6/25/2026, 7/13/2026 & 8/10/2026) on the road. I took my vehicle on 7/14/2026 to the dealer and they said they didn't find any issue after keeping the vehicle for six days with them. If this issue happens while a vehicle is moving on the road it is going to be a big disaster. After the 08second incident I reported to the Honda manufacturer too.

NHTSA ID

11756101

Incident

Aug 10, 2026

2025 Honda Odyssey with 21.5k miles on it. Pulled up to a stoplight after a 3 hour drive. Auto stop turned the van off. When the light turned green the van failed to restart. Put the vehicle in park, turned it off, waited a few seconds and attempted to re-start it. Van restarted but very sluggish, like the battery was dead. Pulled in and parked. Van started normal the rest of the day. Took it to the dealer 2 days later. They noted the battery was a little low but no codes and no explanation for why it failed to restart. They checked alternator and starter and claim they are both good.

NHTSA ID

11756065

Incident

Aug 7, 2026

Vehicles turns off when the brake is pressed and does not turn back on. The van has to be put into park and the start button has to be hit 2-3 times before it will restart. This has happened 3 distinctive times where it was difficult to restart. We try to disable the start/stop system each time we drive. It has left us stranded at traffic lights for up to 20 seconds trying to restart the van, impeding traffic at high speed interchanges. The van does eventually restart but each time it feels like it’s getting more difficult. This problem first appeared about 1 year after purchasing the van with about 23k miles on it and now has 26k miles. There are warnings that display because the vehicle is still in drive when it shuts off and it needs to be placed back into park to restart it. It occurs the most during a long drive on the highway. It can be very jerky when it restarts, perhaps slamming into gear. It is available for inspection and I plan to go to the Honda dealership soon for a scheduled oil change. I have not been there since the 18k mile oil change.

NHTSA ID

11755565

Incident

Jul 25, 2026

RE investigation EA25004. We have had two instances of the van failing to restart after it shut off automatically at a red light. This caused a dangerous traffic situation where the van would not start up while traffic was approaching. The battery is in good condition and the van has just over 10,000 miles on it.

NHTSA ID

11755528

Incident

Aug 7, 2026

When the idle system kicks in, for example, if the vehicle has stopped at a red light, randomly the vehicle will die. Then it will have to be restarted. It has a faulty starter and there’s an issue with the idle system when the vehicle dies at a red light, it creates a safety issue because they are vehicle vehicles coming up behind me and my vehicle is dead and will not move until I turned the vehicle completely off and restart it. It does not happen all the time, but it has happened here and there since I got the vehicle new and now it happens more frequently. They say it will require a new starter motor assembly to repair.

NHTSA ID

11754940

Incident

Aug 4, 2026

This is for 2025 Honda Odyssey. The component/system that appears to have failed or malfunctioned is the automatic engine stop-start system and/or related vehicle power/drive-control system. The vehicle is available for inspection upon request. When stopped at a traffic light or in traffic, the automatic stop-start feature does not restart or re-engage properly, and on several occasions the vehicle became completely disabled and would not move when the accelerator pedal was pressed. During these events, there was flickering/interruption of power, and I had to turn on the hazard lights, shift to Park, turn off the air conditioning, and attempt to power or restart the vehicle before it would move again. My safety and the safety of my passengers were put at risk because the vehicle was unexpectedly immobilized in active traffic. In one incident, the vehicle behind us almost struck my Odyssey because traffic had begun moving after the light turned green, but my vehicle remained stopped. This has also occurred while stopped on the freeway, including in a construction zone, creating a risk of rear-end collision and leaving my family, including children, vulnerable in traffic while other drivers were honking and attempting to move around us. The problem has occurred at least three times, but it has not yet been reproduced or confirmed by a dealer or independent service center. The vehicle/component has not yet been inspected by the manufacturer, police, insurance representatives, or others. Prior to or during the failure, the main symptoms were the stop-start system not restarting the vehicle correctly, flickering power, and the vehicle failing to move despite pressing the gas pedal. The symptoms first appeared during stopped-traffic situations, such as at red lights or during traffic stops on the freeway.

NHTSA ID

11754550

Incident

Aug 2, 2026

The contact owns a 2025 Honda Odyssey. The contact stated that while driving from a complete stop, the Auto START/STOP system failed to restart the vehicle while depressing the accelerator pedal. The vehicle was manually restarted. No warning light was illuminated. The contact stated that the failure was intermittent. The vehicle was taken to the dealer, where the battery was fully charged and tested, and the contact was informed that the battery was in good working condition; however, the contact requested that the battery be replaced. The contact expressed concerns that the battery replacement might fail to resolve the issue. The contact related the failure to NHTSA Action Number: EA25004 (Engine and Engine Cooling). The manufacturer was notified of the failure, but no assistance was provided. The vehicle was not yet repaired. The failure mileage was approximately 12,000.

NHTSA ID

11754545

Incident

Apr 3, 2026

Mileage

12,000 mi

Incident Description: The vehicle entered an Auto Idle Stop event at a traffic light and stalled completely instead of restarting when the brake pedal was released. The red battery warning light illuminated, and the vehicle had to be shifted into Park and the ignition key cycled multiple times to eventually achieve a slow, sluggish crank and engine restart in active traffic. Another vehicle was almost going to hit me from behind since red light turned to green when this happened, and that driver from far behind was thinking that my vehicle will start moving and did not slow down. That driver started honking and yelling. It was scary since I had 3 small kids in my vehicle. Dealership Diagnostics: I dropped off the vehicle at a local Honda Dealership to get this checked. From the invoice/service document, I see this note: Cause: Took several attempts but was able to duplicate concern of when vehicle goes into auto start stop it will not always restart, will have to cycle key. Noticed when it did restart it is slow to crank. Battery tested good, and had good reserve voltage. Used tech line as a resource and found this issue is caused by starter not having enough voltage to properly engage auto stop start. rec replacing starter. Correction: Replaced starter.

NHTSA ID

11754469

Incident

Jul 30, 2026

The Auto idle stop feature fails to restart the car during a stop. This happens intermittently but requires one to fully put the car in park and restart the car. This issue has caused concerns as I was at a stop light with a long line and did not know how to recover until I tried to full shutdown, set the car to park, and restart.

NHTSA ID

11754441

Incident

Jun 5, 2026

The contact owns a 2025 Honda Odyssey. The contact stated that the vehicle failed to restart after being turned off. The Auto START/STOP system failed to operate as needed. The contact stated that the battery was in good working order, but the starter was not operating as designed. The contact stated that the vehicle stalled while at a traffic light. The vehicle was restarted after another attempt with several unknown warning lights illuminated. The contact stated that the failure was associated with NHTSA Action Number: EA25004 (Engine and Engine Cooling). The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 16,000.

NHTSA ID

11754425

Incident

Aug 3, 2026

Mileage

16,000 mi

My brand new vehicle continues to leave me stranded at stop lights because of the auto start stop system. Even though I have already taken it up to the dealership before and had it repaired. (There is a class action started over this)

NHTSA ID

11754353

Incident

Aug 3, 2026

I have experienced numerous instances where my car will stall at a stop light and then fail to restart, even with switching gears to park before resuming to drive.. I have had to turn on and off the engine multiple times at a si hole stoplight before the car would resume movement. This scenario has now happened at least 3 times. I am a mom driving a minivan of kids and this is concerning for our safety. These are not long stop lights. Sometimes even at a stop light I feel a strange pulling sensation.

NHTSA ID

11754288

Incident

Jul 30, 2026

The van is experiencing the auto stop-start defect causing major safety issues for my family. The car stalls randomly at stop signs and stoplights and is unable to be restarted quickly, creating a major traffic and safety hazard. The car often will not turn on at start up. The dealer stated that it needed a new starter. Then said that Honda would not replace the starter until a tech looked at it. Then after several weeks still had not moved forward getting a tech. Then said to bring the van in for them to keep until they could get a tech, and offered a small car without room for the kids as a loaner for the indefinite amount of time they want to keep the van. There were no warning lights when it has happened. This issue is already being investigate by the NHTSA - Investigation Number EA25004. This is a known issue for Honda and I am unable to get a safe vehicle or get my vehicle fixed. Below, i have to choose a date for the incident, but this is ongoing and has happened on more dates that I can possibly log. It happens weekly, if not daily.

NHTSA ID

11754054

Incident

Jun 30, 2026

Several times, The Odyssey won’t restart after the Auto Idle Stop kicks in at a stoplight.

NHTSA ID

11754002

Incident

Jul 27, 2026

Starting problem. The vehicle sometimes (randomly) refuses to start after shutting off. For example, after filling gas, or turning off (idle off) at a stop light. It just refuses to start. Terrifying. Researched on the Internet and found thousands of complaints about this going back years. This needs a recall.

NHTSA ID

11753940

Incident

Jul 23, 2026

The engine fails to restart on its own from a complete stop at traffic light, following the release the brake pedal (Auto Start - Stop). The vehicle will turn off in Drive while idling at the traffic intersection stopped for traffic light. This is a safety concern, that the safety sensor allowing for the vehicle to turn off while vehicle is in drive, could this also happen while driving.

NHTSA ID

11753716

Incident

Jul 24, 2026

I was driving on a road around 30 mph when the engine cut off and shifted itself into park. No warning, no power, no movement. Car was dead in the road and I was unable to move it to the curb. I tried to press the drive button. Nothing. i pressed the starter button. Nothing. Parkway Honda said they could find nothing wrong other than replacing the battery. Car is brand new. Bought used at 6,000 miles and have only driven it 4,000 additional miles in roughly one year. Very dangerous defect for which they have no explanation.

NHTSA ID

11753624

Incident

Jul 29, 2026

The transmission slips and misses constantly, ive taken it to the dealership repeatedly they say they feel it then they dont, its getting progressively worse

NHTSA ID

11753183

Incident

Jul 27, 2026

The contact owns a 2025 Honda Odyssey. The contact stated that on four occasions while stopped at an intersection with the engine idling, the idle stop feature activated, and the vehicle unexpectedly shut off. The mechanic was able to restart the vehicle. There were other drivers behind the vehicle who started honking their horns. Several unknown warning lights were illuminated on the instrument panel. The vehicle was taken to a local dealer to be diagnosed. The dealer inspected the vehicle and determined that the battery and starter needed to be repaired. The battery was replaced. The manufacturer was not contacted. The failure mileage was approximately 22,000.

NHTSA ID

11753072

Incident

Mar 1, 2026

Mileage

22,000 mi

Idle stop and restart problem: After stopping , the engine shut off and won't be able to restart. Happened multiple times even after the Honda services department re-programmed it.

NHTSA ID

11752843

Incident

Jul 24, 2026

Our 2025 Honda Odyssey has repeatedly shut off or failed to restart while stopped. This has occurred approximately 10 times. The vehicle was previously taken to an authorized Honda dealership for this issue. The dealership diagnosed the battery as the cause and replaced it, but the same problem continued afterward. The two most recent incidents occurred on 7/21. During one incident, we were stopped at a red light on a road with a 55-mph speed limit. The vehicle shut off and did not restart normally when traffic began moving. We were left immobilized in an active traffic lane while vehicles approached and passed us at approximately 55 mph. We had difficulty getting the vehicle restarted and moving again. This presents a serious rear-end collision risk because approaching drivers expect traffic to move when the light changes. Four children regularly ride in this vehicle, and we do not believe it is safe to continue driving. We contacted the Honda dealership again after the battery replacement failed to correct the problem. We were told that unless technicians could duplicate the issue, there was nothing further they could do. Because the failure is intermittent, we cannot predict when it will occur, but it has happened approximately 10 times and has continued after Honda’s attempted repair. We also opened a case with American Honda Motor Co., Inc. We are reporting this because the vehicle can unexpectedly leave our family stranded in an active traffic lane and unable to move out of the path of approaching traffic.

NHTSA ID

11752524

Incident

Jul 21, 2026

While the vehicle’s idle stop feature was engaged at a stop light, I took my foot off the brake to start moving again, but instead of starting again, the engine hard stopped and the van turned off completely. It told me to push the brake and start button to start it again but it took trying that several times and eventually holding the brake and start button down before it actually turned back on. Meanwhile, drivers stuck behind me were becoming increasingly irate and people were trying to get around me, despite heavy traffic. This is the second time it’s happened to me in this car. The first was about a month ago.

NHTSA ID

11752466

Incident

Jul 23, 2026

This is at lesat the second time that our Odessey has failed to restart at an interesction following the start-stop system turning off the engine the when stopped at a red light. After a couple of moments of trying to restart, it started again.

NHTSA ID

11752354

Incident

Jul 19, 2026