During a normal commute on the highway, the vehicle suddenly lost all engine power and stalled in the middle of high speed traffic. The vehicle could not exceed 8 mph while attempting to pull to the side of the road for safety. There were no warning lights (other than a low tire pressures - normal for cold days) and no error messages. The car was unable to get started for about 10 minutes. Eventually, the engine started and the vehicle was able to make it back to our residence. The battery was near 55% at the time of the incident (out of a maximum of 80% recommended charge) In terms of safety, this was a near fatal incident, as suddenly losing power and stalling in the middle of the highway during high speed traffic and snowy conditions could have been devastating.

- Schenectady, NY, USA

On December 1, 2025, the 2025 Honda Prologue was pulling into a parking spot between two parked vehicles at low speed. While in forward gear, the Prologue experienced an unexpected acceleration event and collided with three parked vehicles, two of whom were hit with sufficient force to impact adjacent parked vehicles. The driver is unaware of having pressed down on the accelerator and is additionally concerned about why none of the vehicle safety features such as the equipped Collision Mitigation Braking System (CMBS) activated to prevent these collisions. The vehicle was brought to a local Honda dealership, yet they were unable to draw any conclusions regarding why the unexpected acceleration event occurred. The vehicle owner requested a DTC scan report and EDR (event data recording) data from the vehicle, and received the DTC report but not EDR data. The Honda dealership advised calling the American Honda customer service line with the case number to obtain EDR data. The customer service line was not able to assist because they were not able to identify the case manager, which points to a documentation error within Honda servicing processes.

- Lake Villa, IL, USA

My vehicle recently began displaying the error messages -??Service High-Voltage System-?? and -??Reduced Acceleration -?" Drive With Care.-?? Since these warnings appeared, my vehicle-??s heating system no longer works at all. This defect creates multiple serious safety hazards: 1.No heat in cold weather: Temperatures in my area are currently around 42?F, and the cabin cannot warm up. This creates an unsafe temperature environment for myself and especially for my children while driving. 2.No ability to defrost windows: Without heat, the vehicle cannot defog or defrost the windshield or windows. This severely impacts visibility and creates a dangerous driving condition. 3.Reduced acceleration: The vehicle warns of reduced performance, which may affect my ability to safely merge, change lanes, or respond to traffic conditions. These issues began without warning, and the loss of heating combined with high-voltage system errors makes me concerned about a potential electrical or battery system failure. This is a significant safety concern that needs to be investigated, as the vehicle is not safe to operate in its current state. I request that NHTSA look into this issue, as other owners have reported experiencing this same dangerous combination of high-voltage errors and loss of essential climate-control functions with no resolution from the manufacturer.

- Rancho Cordova, CA, USA