2025 Honda Odyssey Electrical 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

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

In approximately October 2025, while stopped at a traffic light, my 2025 Honda Odyssey's auto idle-stop system shut the engine off as designed. When I released the brake, the engine failed to restart. The vehicle remained disabled in active traffic for about one minute. After several attempts and shifting into Park, it finally restarted. There were no warning lamps or messages beforehand. This put me and others at risk because the vehicle was unexpectedly immobilized at an intersection and could have been struck from behind. An authorized Honda dealer diagnosed the starter as causing a slow/no-start condition and replaced it under warranty on October 9, 2025, at 21,211 miles (repair order #192362). The problem has recurred. I began noticing hesitant or slow restarts and normally disable auto idle-stop because I am afraid the vehicle may again fail to restart. On August 4, 2026, at 40,990 miles, the same Honda dealer diagnosed the starter as needing replacement again (repair order #203412). The battery passed its reserve-capacity test. The dealer documented a 0.600-volt ground-side drop, a 0.275-volt positive-side drop, and onboard voltage falling to approximately 7 volts during restart. Honda TechLine directed the dealer to replace the starter (TechLine case #5009355). The vehicle and current starter are available for inspection. The original starter was retained or disposed of by the dealer after the first repair. American Honda case #16533911 is open. No police or insurance representatives inspected the vehicle.

NHTSA ID

11754866

Incident

Aug 3, 2026

When the vehicle comes to an idle stop and brake is released, the vehicle shuts off and does not kick back on. Only solution in the moment to get the engine to restart is trying to start the car repeatedly until it comes back on. Vehicle has been looked at for this issue but they were unable to replicate the issue. Engine light will sometimes come on when this occurs. Other times the charging system light comes on, as well having multiple warning lights coming on at once. Causes a safety issue when it’s not restarting while in traffic. Issues started a few months after purchase. Took it into the dealer and they determined the throttle body needed to be replaced.

NHTSA ID

11754473

Incident

May 3, 2025

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

While driving my 2025 Honda Odyssey, the Auto Idle Stop system shut off the engine at a stop as designed, but the engine failed to restart when I released the brake pedal. This left the vehicle stalled at an intersection. No warning lights appeared. This has occurred 6 times. Dealer was contacted; service is scheduled

NHTSA ID

11754289

Incident

Aug 1, 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

The contact owns a 2025 Honda Odyssey. The contact stated that the engine auto start-stop system failed to restart the vehicle while at a complete stop, requiring the driver to manually restart the vehicle after several attempts. The message "Shift to Park to Start Vehicle" was displayed. The vehicle was taken to the dealer, where it was diagnosed with a loose battery cable and the battery was replaced; however, the failure recurred. The vehicle was not further repaired. The manufacturer was notified of the failure and informed the contact that a case manager would follow up. The failure mileage was approximately 5,000.

NHTSA ID

11754031

Incident

Jul 31, 2025

Mileage

5,000 mi

The AIS system does not start back up at a light. Sometimes throws itself into park. Last week it started up, but everything shut down about 75 after the traffic light. The entire car loss all power. In the middle of traffic. Needed a policeman to wave cars around e in the middle of the street. Took to the dealership; they kept it for two days and could not recreate the situation. The car had the same problem with start up two days later after leaving the dealership

NHTSA ID

11753958

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

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

Internal starter failure.

NHTSA ID

11753093

Incident

Jan 1, 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

When the van is turned off it does not want to start easily again. This has now happened approximatly 5 times. I had the battery checked at O'reilly's and the battery was fine but the starter was not.

NHTSA ID

11752804

Incident

Jul 25, 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

My 2025 Honda Oddessy with only about 31,000 has stalled in the last 2-3 months about 5 times at stop signs/stop lights. It throws itself in park and doesn't recognize that I'm pushing any buttons. On the dash it only says "press the brake" which I am doing. I called Victory City Honda in Michigan City, IN [XXX]) and arranged a diagnostics check on XXX. They said it wasn't throwing codes and didn't replicate when they test drove the vehicle. If I turn off the auto start/stop it doesn't seem to happen but if I forget to push this button each and every drive - it stalls and won't start for up to 10 minutes. Once we were parking at home and it would not allow us to shut the vehicle off. Upon research I found NHTSA investigation ID#XXX with the exact problem I am experiencing. I called my Honda dealor to report and they stated they are not able to do any software updates without a Honda recall. I have another appointment with them on XXX to check the battery and possibly the brake pedal sensor. Please help. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11752394

Incident

Jul 23, 2026

2025 Honda Odyssey with approximately 22,000 miles. On multiple occasions while stopped at traffic lights or stop signs, the vehicle's Auto Idle Stop feature shut the engine off normally. When I attempted to accelerate, the engine failed to restart, leaving the vehicle disabled in the travel lane. The battery warning light illuminated, and on one earlier occurrence I believe a "Shift to Park" message may also have appeared. I was able to restart the vehicle by pressing the Start button, shifting back into Drive, and continuing normally. The most recent incident occurred while stopped at a traffic light. When the light turned green and I pressed the accelerator, the vehicle did not restart or move. I had to manually restart the engine while stopped in the intersection before I could proceed. This created a safety concern because the vehicle unexpectedly became disabled in active traffic. The vehicle has never exhibited difficulty starting during normal operation, either when cold or warm. The problem has only occurred after the Auto Idle Stop system shut the engine off at a stop. The vehicle has not yet been inspected by a Honda dealer, but an appointment will be scheduled.

NHTSA ID

11752245

Incident

Jul 22, 2026

After AIS engaged, the engine wouldn’t come back on. This has been at intersections, etc where it was dangerous to have no engine. It is ridiculous that the feature has not been removed after problems going back to the 2018 model. All to game an emission standard. Shameful.

NHTSA ID

11751976

Incident

Jul 20, 2026

Vehicle failed to start occasionally, which could be a hazard with the auto start/stop feature. Issue was confirmed with dealer and corrected under warranty. Starter was replaced.

NHTSA ID

11751620

Incident

Jul 13, 2026