2025 Honda Odyssey

My 2025 Honda Odyssey intermittently fails to restart after the Auto Idle Stop system shuts the engine off at traffic lights or stop signs. When I release the brake to proceed, the engine does not restart as it should. Instead, the instrument cluster displays messages such as “Shift to Park to Restart” and/or “Press Brake to Start.” At that point, the vehicle is immobilized in traffic and I must shift into Park and manually restart the vehicle using the Start/Stop button before I can continue driving. The problem occurs intermittently, making it difficult for the dealer to reproduce. It appears to happen more frequently when the air conditioning is running, although it has also occurred under other conditions. This creates a significant safety hazard because the vehicle can become stranded in the middle of an intersection or at a traffic light, exposing occupants to the risk of being struck by other vehicles. I took the vehicle to a Honda dealer, but because the condition could not be reproduced during the visit, no repairs were made. The issue continues to occur. I am reporting this because the failure of the Auto Idle Stop system to restart the engine presents a serious safety concern and appears consistent with reports from other Honda owners.

There is an idle function on the engine that shuts the engine off when at rest, the engine has failed to restart and the car dies in the middle of the street, without warning, as if the battery is dead. The handful of times this has happened the car has been able to start back up within two or three tries. Honda acknowledges the issue as far as I know. The dealership let me know this is a known issue. It is unacceptable that there is no fix to this problem.

The contact owns a 2025 Honda Odyssey. The contact stated that while attempting to accelerate from a complete stop occasionally, the vehicle hesitated while the accelerator pedal was depressed. No warning lights illuminated. In addition, the contact stated that while Eco mode was activated, the failure occurred more consistently, causing the air conditioning to fail to power on in hot climates. The contact stated that the failure became persistent. The vehicle was taken to a local dealer, who diagnosed that excessive heat caused a starter seal failure, and the vehicle was repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 16,598.

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.

The vehicle suffers from an intermittent electrical/charging and starting system failure tied to the Auto Idle-Stop feature. While driving and coming to a stop at active traffic lights, the engine stutters and completely shuts down. It then fails to automatically restart, requiring multiple manual attempts to crank the engine back over. This creates a severe safety hazard, leaving my family suddenly stranded and vulnerable to being rear-ended in live traffic. The vehicle also intermittently struggles or takes multiple attempts to start after being parked in lots. ​The issue has been brought to two separate authorized Honda dealerships within a 30-day window. The first dealership diagnosed a failed battery and replaced it under warranty, but the stalling recurred. The second dealership held the vehicle for five days for diagnostic testing but stated they could not replicate the defect, returning it with no repairs made. Immediately upon picking the vehicle up from the second dealer, it suffered another starting failure in a parking lot. No warning lamps or error messages appeared on the dashboard prior to these failures. The components are intact on the vehicle and available for inspection upon request.

1st concern- while in an intersection the van powered off after lights on dashboard said something about a system failure. I tried restarting vehicle several times as I was really nervous being in an intersection and it finally started after a few tries. This same thing happened l, to my husband, while parked in our garage about to leave. 2 nd concern- last week on XXXI drove to [XXX] for a short vacation and while at a stop the dashboard had multiple warnings going off 1) electrical power steering system problem 2) Hill start assist problem. Vehicle may roll upon brake release 3) adaptive cruise control problem 4);power steering system problem. I called Roadside assistance and we waited about an hour and a half. He used a tester and said all was coming back fine but to take van to a dealer the next day. We took it to Egg Harbor Honda dealership and they said if the codes have cleared, which they had, then there is nothing they can do and to just take it to our dealer when we return home. I have an appointment for tomorrow at XXX at 915 am at [XXX] of Honda in Abington, PA. I have pictures of all the "2nd concern" warnings. During the 1st concern I was driving and did not feel comfortable capturing the warning lights with my phone camera. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

When stopped at a stop light, the car went into idle stop. Upon taking my foot off the brake to accelerate, the car stalled and required me to push the brake and ignition button to shut it off completely and then restart the car. This has happened on 8 separate occasions. It seems to happen more frequently when we have the AC on on a hot day. It's scary to be at a light with cars waiting to go around you sometimes in the middle of a busy road and your car just stops. I feel anxious when driving on the highway that the car will just stop, though I think that is unlikely given how this happens. We have gotten into the habit of turning off the automatic idle stop feature when we drive and that gets around it, but you have to shut this off every time you start the car, so we forget sometimes. No warning lights before the failures occur nor after. We are going to visit the dealership, but this is a known issue that is already under investigation and so I am just adding our report to the pile of others as additional evidence.

We purchased a brand new 2025 Honda Odyyssey in Nov. 2024. Within a couple months of owning our new vehicle we began having issues with the Auto Idle Stop system. The vehicle will not turn back on at random when stopped at any time when driving. This is a huge safety risk as this has often happened while stopped at a light. It’s also happened when in the drive through. Essentially any time stopped to then go from the brake to the gas. There are times I can get the vehicle restarted quickly and other times it just won’t turn back on for about 30 seconds. The battery light flashes at times when this happens, but not consistently every time. The screen also shuts off and all power to vehicle until I get it restarted. I have had moments where I thought someone was going to rear end me. This issue occurred three or more times prior to our vehicle being outside the warranty and prior to the mileage being outside the warranty. The dealership has since given us an issue now that we are outside the warranty saying that any repairs now fall on us even though this is a recurring issue. They “attempted several repairs” to which none have fixed the problem. We have spent more time in a rental vehicle and switching back and forth to different vehicles waiting for the vehicle to repaired then any family should deal with a brand new vehicle. We are a family of 7 and in no way have time to be completely jerked around and in a manner that the dealership is now trying to wash their hands of. They essentially promised a resolve till we got outside of our warranty window and now it’s no longer their responsibility. We feel completely strung along as now they informed us we don’t qualify for lemon law even though we absolutely did. We were also informed by Janelle the service manager that our vehicle isn’t made for short trips. We have videos of the vehicle having these moments and we have everything documented through text with the manager and service manager of Honda Checkered Flag.

When I am stopped at a red light, the auto shutoff is activated, and when I lift off the brake and try to accelerate forward at the green light, the vehicle stalls for about 15 seconds, leaving the driver and passengers vulnerable to a car accident. One of the passenger seatbelts triggers the "no seatbelt" alarm, even when the passenger is buckled. If no one is seated there, there is no alarm. This only happens when someone is seated there. In order to bypass the alarm sound, the passenger has to unbuckle and re-buckle so that the car knows that the passenger is seated. Once the car shifts after a turn or curved road, the alarm will sound again. During an average 20 minute car ride, it'll probably do this 5-6 times, depending on how many turns or curves there are on the route.