*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Power train
The vehicle is experiencing an intermittent but highly dangerous defect involving the factory-installed Auto Idle Stop system. When the vehicle comes to a complete stop at intersections, traffic lights, or in stop-and-go traffic, the Auto Idle Stop system engages as designed and shuts off the engine. However, upon releasing the brake pedal to accelerate, the engine fails to restart automatically. Instead of seamlessly restarting, the vehicle completely stalls in live traffic. The dashboard instruments remain on, but the engine drops completely out of operational mode. To recover propulsion, the driver must shift the vehicle entirely into Park, press the start/stop button to cycle the…
May 1, 2025Engine
The vehicle's Auto Idle Stop (AIS) system engaged normally when coming to a complete stop at an intersection, shutting off the engine to save fuel. However, when attempting go through the intersection after the light changed to green, the engine failed to restart automatically. The vehicle completely lost power in an active lane of traffic, creating a safety hazard. The vehicle had to be shifted into park and manually restarted to clear the roadway. This failure appears directly related to NHTSA Engineering Analysis EA25004 regarding Honda/Acura Auto Idle Stop restart failures.
Sep 18, 2026Engine
When I come to a stop and the auto idle feature is enabled, my car sometimes fails to turn back on, and I am stuck, trying to get my car turned back on. It usually involves me completely turning off my car, opening the car door and then turning the car back on
Oct 25, 2026Electrical system
My 2025 Honda Odyssey has repeatedly failed to restart after the Auto-Idle Stop feature automatically shut off the engine while idling in traffic. This is a serious safety hazard that could leave the vehicle disabled in a busy intersection, exposing occupants and nearby motorists to the risk of a potentially catastrophic collision. Despite two starter replacements in October 2025 and October 2026, the problem has occurred multiple times. The authorized Honda dealership acknowledged this is a known issue but stated that no permanent solution is available. No warning messages were observed before the failures. A vehicle that can unexpectedly become inoperable in traffic presents an…
Oct 22, 2026Power train
We have been experiencing issues with the car stalling while driving. Most recently, the car lost power a few feet into making an unprotected left turn leaving us stranded in the middle of an intersection in a vulnerable position for several minutes. This was deeply unsettling to have happen while making left turn maneuver. It seems to be a failure of the Auto Start/Stop function. After a few persistent trips to the dealer, they have now informed us that this is a known issue, but the parts are on backorder until January 2027. The workaround is turning off the Auto Start/Stop function, but this button does not have an indicator light, is not always confirmed on-screen, and is re-enabled by…
Sep 14, 2026Electrical system
The Auto Idle Stop (AIS) on our 2025 Honda Odyssey will cause the van to stall and the engine will not restart. When this happens, our only option is to put the van in park, shut it down and then restart. Sometimes that van has not restarted for almost 90 seconds. We have had it into the Honda dealership three separate times for this issue. The first time they told us the battery was drained so they recharged for over eight hours. The last time they said "the battery fails the load test at this time" so they replaced the battery and stated that the vehicle was "operating as designed at this time." Since the last time we had it in for service (and with a brand new battery), the AIS has…
Oct 25, 2026Engine
Engine and vehicle completely turns off when auto start/stop engages when at complete stops.
Oct 25, 2026Electrical system
Auto Idle start stop system failed to start vehicle while. We were stopped at a red light auto idle shut down the engine once the light turn green and we attempted to move forward the auto start failed to cycle resulting in a stalled vehicle on the road, potentially increasing risk to passengers and other drivers on the road. This has happened multiple times.
Oct 25, 2026
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.
