2025 Honda Odyssey electrical problems

ELECTRICAL SYSTEM

While waiting at a stop light, the engine turned off and the vehicle forced itself into park. Taking my foot off the brake, had no effect. I was not able to put the vehicle back into drive. I had to shut off the engine and restart it in order to drive again. Of note, the AC and carplay were running at the time of the engine failure. No warning lights appeared. Cars behind me were honking at me. I have an appointment scheduled with the dealership to assess the auto-idle function.

NHTSA complaint #11758648 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Vehicle turns off unexpectantly at red lights/intersections when auto idle engages and will not restart automatically. It takes 1 to 2 minutes for the vehicle to restart. There is no predicting when the issue occurs. Causes vehicle to be immobile in busy and congested intersections which results in safety issues to us and oncoming traffic. There is a potential for a head on or T-bone collision when this happens. We've had starter replaced before at 22,000 miles and now we have to do it again at 36,000 miles. The Honda dealer said he sees this issue twice a week so we aren't the only ones. To my knowledge, Honda has yet to come out with a permanent repair.

NHTSA complaint #11757915 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

At a stop light and in traffic several times the vehicle has failed to restart when stopping for the idle start/stop. The vehicle will not immediately restart and takes several minutes, leaving me idle in the middle of traffic. The vehicle has been to the dealership several times for repair however I'm still experiencing this issue. This is a serious safety concern for my family.

NHTSA complaint #11757590 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

I was at the red light and the car wouldn't come out of idle. The battery light came on and the i tried to turn the car off and it just keeps cycling. I had to open the door for the car to cut off and then restart the car. This is the 3rd time this has happened and almost resulted in me and my children being hit.

NHTSA complaint #11757371 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

While stopped at a red light or intersection, the vehicle's Auto Idle Stop feature engages and shuts off the engine as designed. However, on multiple occasions, the engine has failed to automatically restart when the brake pedal is released. The vehicle remains stalled and unresponsive in the middle of the intersection or traffic lane, creating a safety risk to myself and other drivers, particularly at busy intersections. In some instances, the vehicle needed to be fully powered off and restarted before it would move again. This is a known and widely reported defect affecting Honda and Acura vehicles with the Auto Idle Stop system, currently under NHTSA Engineering Analysis EA25004. The problem has occurred repeatedly and unpredictably, with no consistent warning beforehand. The vehicle and its Auto Idle Stop system are available for inspection upon request. The problem has not yet been confirmed by a dealer, though I intend to bring it in for diagnosis. There were no warning lamps or messages before the failures occurred; the only symptom was the engine simply not restarting after an automatic idle stop.

NHTSA complaint #11757543 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

After driving the vehicle and stoppping for gas or to run a quick errand the van sometimes will not start, or gives difficulty starting. Slow to crank or turn over, sometimes has to be started multiple times before it will restart. It happens after the motor has been running. It never has issues first thing or the first time turning the car on for the day. The issues come once the motor has been run. -took the vehicle in to Honda dealer on 6/8/26 they recharged the battery. -7/9/26 took van into Honda dealer they replaced the battery. 8/15/26 van still having issues starting once engine warm. Dealership said starter is failing and replaced the starter.

NHTSA complaint #11757306 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Sometimes the engine wouldn't start. Sometimes the engine would be slow to start. Checked battery and nothing wrong with it. Took it to Honda and asked to look into common starter problem. They did say the starter was faulty and replaced it.

NHTSA complaint #11757128 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Vehicle with 37k miles. When the idle stop feature is activated at a stop, it causes the vehicle to stall requiring a restart. The starter occasionally does not work as well. Starter and battery was replaced at 12k and the issue has resurfaced. This poses a significant safety risk.

NHTSA complaint #11756666 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Starter is very weak when hot. 2 hour drive in summer heat and the van would not start after stopping at a gas station.

NHTSA complaint #11756843 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

My van has an auto-stop feature that shuts the engine off at stop lights. This feature will now occasionally shut the car off, but then fail to restart it. We have stalled out at intersections with the van not restarting for up to a full minute. This is incredibly dangerous and needs to be addressed immediately

NHTSA complaint #11756849 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11756215 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11756239 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11756065 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11755565 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11754866 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11754353 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11754425 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11754441 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11754469 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11754473 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11754289 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11753940 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11753958 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11754031 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11754054 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11753624 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11753072 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Internal starter failure.

NHTSA complaint #11753093 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11752804 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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 complaint #11752843 — an unverified report by a vehicle owner.