general problems of the 2025 Honda Odyssey - part 2

Starter failure due to heat. Vehicle has failed to restart several times while stopped in traffic and at a traffic light due to the auto idle stop function.

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.

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.

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.

Component and availability: the engine fails to restart after auto idle stop shuts it off and now also fails to start on normal starts. The failure involves the auto idle stop system and the engine starting system. The vehicle is available for inspection on request. What happened and safety risk: on approximately 8/5, I was stopped at a stop sign with auto idle stop engaged. The engine shut off as designed but did not restart when I released the brake, and the vehicle automatically shifted into park. The start button would not restart the engine, the vehicle could not be shifted out of park, and the button also would not turn the vehicle off. The vehicle was stranded in an active intersection, where other drivers had to go around it, until it eventually restarted after several tries. Since then we have turned off auto idle stop on every drive, but the vehicle has now also failed to start on normal starts: 9/17, 9/18 and several others in the 8/5-9/17 period. The car would not crank and start, it would only start after several (3-5) tries. A vehicle that cannot be reliably started or restarted risks leaving the driver and passengers stranded in traffic or unsafe locations. Dealer confirmation: this car has been seen by the dealer previously (I. E. , in summer 2025) with the same issue, and had battery and starter system replaced. However, the issue recurred after several months. This vehicle appears to fall within NHTSA investigation ea25004 (auto idle stop failure to restart). Warning signs: no warning lamps or messages appeared before or during the failures; dashboard and interior lights worked normally throughout. The only earlier symptom was slow or rough engine restarts after auto idle stop on hot days.

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.

2025 Honda Odyssey elite. Approximately 12,000 miles. Vehicle has experienced 4–5 instances where auto idle stop engages while stopped and the engine fails to restart. Vehicle cannot immediately be restarted with the push-button ignition and must be completely shut down before it will restart. Battery was replaced by Honda, but the condition is ongoing. Vehicle can and has become disabled at an intersections and traffic lights creating a potential collision hazard.

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.

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).

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.

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.

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.

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.

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.

Several times, the Odyssey won’t restart after the auto idle stop kicks in at a stoplight.

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.

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.

Engine won't start. This problem began as intermittent no start after driving for more than 30 minutes in hot weather. Such as stopping for fuel or a roadside rest on the interstate. It has progressed to intermittent no start in the mornings, or after work. Or after short drives for errands. Vehicle has been evaluated by the Honda service center. They stated they couldn't reproduce the problem, but it is a known problem. They also stated that there isn't any parts available. And there won't be any parts available until January 2027 or later. I asked what's my options, this car isn't reliable and it's going to leave my family stranded. The service center told us to not use ais (auto idle stop) we haven't used it since we bought it. No loaner, rental or other options. No replacement parts for 5-6 months isn't acceptable. This vehicle only has 20,000 miles and is 18 months old.

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.

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.

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.

Engine fails to restart after auto off.

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.

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.

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.

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.

When stopped at a red light today, our minivan's auto idle stop (ais) system stopped the engine with the brakes depressed (as advertised). Once the light turned green, the driver released the brake to re-engage the motor, but the starter did no restart the minivan and a battery light flashed on. The start button had to be pressed several (~4) times to get the motor to restart and to turn the battery light off.

My vehicle has failed to restart numerous times at stoplights with the auto start engaged. It also failed once when it was disengaged. It also stalls to start on initial start quite often. Even when it is disengaged, upon stopping my vehicle makes a type of quiver in the engine that sounds like a stall or like it is about to cut off. It usually evens out after 5-10 seconds. I had people drive around me, in heavy traffic, after a major fail at a red light. I had an aggressive drive pass around me quickly at another incident at a smaller redlight intersection. I have had it cut off, with my family, over 50mls away from home. A dealership replaced my battery that was under warranty. I was told there were no other issues and to keep my auto start disengaged while driving. I'm not sure that is my safest option at this point. I am extremely concerned it will happen at an intersection and I will roll into traffic with my family.

Auto idle stop/start system malfunctions intermittently. The car will shut off at a red light/stop sign then will not automatically restart. Will require shifting to park and restarting the car at the intersection.

This has been addressed by the dealer once before and the starter was replaced, however the problem is happening again. The auto start/idle feature will not start the car back up while stopped on occasion. For instance, yesterday while stopped at a red light the auto idle/start feature kicked in, as expected. When releasing the brake to drive when the light turned green the car beeped and would not start again. We had to power the whole van down at a busy intersection and restart. Thankfully it started. We didn’t catch what warning lights flashed when the van beeped, but no warning lights were present before the issue. As mentioned, this has happened before to the point the dealership replaced the starter. But unfortunately, it is happening again. The van often has a rough start as well when using it, but not every time.

My vehicle has experienced repeated unexpected engine shutdown/no-start events, creating a significant safety hazard. The engine has unexpectedly shut off or failed to restart while stopped in traffic and while entering traffic, resulting in a sudden loss of propulsion. On one occasion, the vehicle would not restart for approximately one minute. The vehicle was inspected by an authorized Honda dealership, and the starter was replaced under warranty in July 2025. The repair did not correct the problem. Since that repair, the same failure has occurred multiple additional times. The issue has now occurred at least six times over approximately one year. Because the condition is intermittent, the dealership has not permanently identified the root cause. The vehicle is currently being returned to the dealership for further diagnosis, and I have requested that the matter be escalated to Honda technical assistance (tech line) and Honda engineering. This defect creates a serious safety concern because the vehicle can unexpectedly lose power while in or entering traffic, increasing the risk of a collision. There were no consistent warning lights or messages before the failures, and the condition occurs intermittently without warning. The vehicle remains available for inspection.

2025 Honda Odyssey. When the auto start/stop engaged, the engine failed to turn back on when the brake was released. It left my family stranded at a stoplight for multiple minutes before my wife could get it going again. After going rounds with the dealership and Honda not being able to 'recreate the problem', they finally put in a new starter and the van worked for the next year. Fast forward one year later and it did the same thing. Now the dealership cannot recreate it again, and I am concerned for the safety of my wife and kids. Brand new vehicle should not do this and Honda is not doing anything to rectify the situation. I have read there are over 2 million complaints on this issue on this website but don't understand how a recall has not been implemented.

Un known.

The vehicles auto start/stop system has failed to restart the vehicle at stop lights multiple times, requiring a full system reset. At least 2 of those times it has failed and would not restart with a the button press reset.

Stopped in heavy traffic in a four lane highway. Auto start/stop shut the engine down as expected. Traffic ahead cleared. I took my foot off of the brake to step on the gas. The engine didn't start up, and the radio and all lights inside went blank. Traffic behind me approached at about 45 mph. And were swerving around to avoid hitting my dead vehicle from the rear. I pushed the start button. Nothing. Again. Nothing. Several times more with my foot on the brake, or off the brake. Nothing. I put it in park and kept trying the start button. Finally it started, the radio and dash display came on, and from then on it operated as usual. Scared the hell out of us. There was no warning that anything in the car was malfunctioning before this happened. Took it to the dealer. They looked it over, kept it overnight. Told me the next day that the battery can get drained too much if the air/cond is on max and the start/stop feature doesn't like that. They used a machine to drain the battery and recharge it and they tell me now that it should be good. I don't believe one has to be aware not to use the air on max while the start/stop is enabled. I'm afraid to drive the car now! our lives were in danger.