2024 Honda Prologue Brakes Problems

On at least 3 occasions my car has braked automatically for no reason. Nobody was in front of me or behind me.

the automatic emergency braking system in both forward and reverse is to sensitive and violently slams the brakes when there is no risk of a collision. the most recent incident involved making a left hand turn where there was a little overpass wall on the passenger side of the street i was turning onto. with cars behind me the vehicle slammed the brakes as i was going approx 10-15MPH , startling myself and all 3 passengers and almost causing me to be rear ended. the vehicle also slams the brakes in reverse when there are no objects in the way predominately if it is raining out. it's a harsh violent stop and can cause an accident or injury. due to this incident the vehicle is back at the dealership for a total of 3 appointments and 32 days in repair for this issue and they still have not remedied the issue

While driving my 2024 Honda Prologue, the automatic emergency braking system (part of Honda's Collision Mitigation Braking System) has activated unexpectedly and forcefully multiple times — with no obstacle or vehicle ahead. The most serious incident occurred on 6/28/2024, while traveling at approximately 70 mph. The vehicle suddenly slammed on the brakes without warning or any visible threat in the road. We did not crash, but the vehicle behind us narrowly avoided rear-ending us. This also happens about 50% of the time we reverse the vehicle. Given the potential severity of this defect — especially involving passenger injuries and potential crashes — I am deeply concerned. Many other Honda owners have reported similar phantom braking behavior across multiple models, and I believe this defect needs to be investigated urgently by NHTSA. Honda has not issued a recall or provided public guidance on how to disable or address the system, leaving drivers at risk.

I got in my car and received the following error messages immediately upon turning on the car: - Brake System Failure 43 MPH Max Speed - Brake Assist Failure. Press hard to brake. Speed limited. - Service Stabilitrak - Auto Hold Unavailable Driving the car was very unsafe as the brakes were extremely difficult to engage, taking my full body force to fully depress the pedal and have the brakes slowly engage. I have taken the car to my Honda Dealership, which (at this time) has been unable to replicate the issue or find a problem. This is a safety issue to have unresolved, as the brakes suddenly becoming extremely difficult to work makes the car unsafe to drive.

While driving my 2024 Honda Prologue, the automatic emergency braking system (part of Honda's Collision Mitigation Braking System) has activated unexpectedly and forcefully multiple times — with no obstacle or vehicle ahead. The most serious incident occurred on [insert date], while traveling at approximately [insert speed] mph. The vehicle suddenly slammed on the brakes without warning or any visible threat in the road. The sudden stop caused whiplash injuries to my wife and two children, who were passengers in the vehicle. We did not crash, but the vehicle behind us narrowly avoided rear-ending us. I have attempted to get the vehicle serviced, but the nearest dealership told me there is a wait time of over a month, so no diagnostic has yet been performed. Given the potential severity of this defect — especially involving passenger injuries and potential crashes — I am deeply concerned. Many other Honda owners have reported similar phantom braking behavior across multiple models, and I believe this defect needs to be investigated urgently by NHTSA. Honda has not issued a recall or provided public guidance on how to disable or address the system, leaving drivers at risk.

When I put the car in reverse the automatic emergency braking system engages multiple times. Though there are on abstracts on the path. I have to constantly keep pressing the parking brake multiple times in order to get out of my driveway in the morning and afternoon. This is a constant occurrence weather there it is raining or not raining.

Driving in the express lanes south of Atlanta in the rain, the vehicle's Automatic Emergency Braking system activated for no reason. There were no other vehicles around, and we were on a straightaway. It was such an abrupt deceleration that if another vehicle had been tailgating me, they probably would have run into me.

During a storm when backing up out of parking spot the prologue did an emergency breaking procedure , engaging the parking break. (There was no one behind me or anything in the way) and left me stuck in the middle of the street until I could figure out what happened. I had to manually release the parking brake and as I did that, I then almost ran into someone that was trying to go around me while I was a full stop. Since this happened randomly, I was not fully sure what was going on . This creates a huge safety hazard when there is no reason for it. There are many reports of this in forums that say just turn it to warning only mode, which then removes a safety feature that 1, was paid for and 2 could actually prevent a accident

Brake system failure message and car was exremely hard to stop. I had to stand on the brake pedal to get the car to stop

On 2/16/2025, I was slowly (maybe 5mph or slower) backing out of an Electric vehicle charging stall. Rain was falling lightly. The AEB system activated more than five times in a span of 60 seconds. The vehicle thought there was an obstruction in my path, even though there was no vehicle behind me or in front of me. There was a vehicle that was parked in the other stall charging.

Pulled out of our driveway and received a message that "AWD Temporarily Unavailable". This message did not indicate that this fault disables one-pedal driving. Upon reaching the end of my street at the stop sign, I gently let my foot off the accelerator expecting the car to slow down as it should when using one-pedal driving. Instead the car continued to move forward and I almost went through a stop sign into a busy road where I would have for sure gotten into a bad accident. Not informing the driver that this fault also disables one-pedal driving is extremely hazardous.

On [XXX], I leased a Honda Prologue from Honda Carland in Roswell, GA. Within a week, the vehicle displayed multiple braking system failure warnings, including “Braking system failure,” “Service Stabilitrak,” and “Brake assist failure.” One-pedal driving also became unavailable. Upon attempting to drive, the brakes were completely unresponsive, causing the car to roll down a ramp uncontrollably before eventually stopping. Despite multiple attempts, the brakes failed entirely, making the vehicle out of my control. I immediately called Honda’s OnSite service, and the car was towed back to the dealership. The dealership initially diagnosed the issue as a loose connector that was allegedly not properly attached during assembly. They assured me the vehicle was now functioning as designed. However, about a week later, the same critical brake failure occurred again. The car would not brake, forcing me to request another tow back to Honda Carland. This time, the dealership claimed the issue was due to a faulty brake master unit, which they replaced—a far more serious defect than initially diagnosed. Given the life-threatening nature of repeated total brake failure, I refused to drive the vehicle and attempted to return it. In researching this issue, I have found similar complaints in online searches, including the NHTSA database, suggesting that this may be a much broader issue affecting Honda Prologue vehicles manufactured in 2024. This is not a minor issue—it is a safety hazard that puts my life and the lives of others at risk. I am not willing to drive this defective vehicle, and I urge the NHTSA to investigate this matter immediately to ensure that no other driver is put in danger due to brake system defects in the Honda Prologue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Unknown braking while no objects in front or behind the car. Warns lane departure too late after you crossed halfway through the lane.

When I was backing out of a parking spot the rear collision detection went off without any obstructions behind me. Although I was safe this could of caused bigger issues.

While backing up the car will slam on the brakes for no reason. It has done this twice with nothing behind me. Scary when you think you have got something.

I have encountered recurring problems with the vehicle's automatic braking system, as well as issues with the Honda Prologue app, both of which I believe compromise the vehicle's safety and performance.
The vehicle's automatic braking system appears to be malfunctioning, as it has activated unexpectedly on multiple occasions, leading to near-miss accidents. At least three occasions, the vehicle’s brakes have engaged without cause, even in situations where there is no obstruction or “phantom” vehicle detected. This automatic braking has not only been inappropriate but also posed a significant safety risk to both myself and other road users. Additionally, the reverse braking system exhibits similar issues, activating without cause. Despite the alerts being on and the brakes not being engaged, the system’s warning signals still activate, leading to further confusion and potential danger. I have consulted with both the dealership and the Honda Prologue forum, and it has been confirmed that this is an ongoing issue. The dealership has indicated that they have no immediate workaround or solution. The only remedy has been to disable these safety features entirely, which negates the very purpose of having them. 
The Honda Prologue app, which is intended to provide critical vehicle information and allow remote monitoring and control, is also malfunctioning. I have been in communication with Honda for over two months regarding these issues, but unfortunately, no viable solution has been provided. The app is essential for monitoring vehicle functions such as theft prevention, charging status, and temperature control, all of which are key safety and convenience features. In particular, I am concerned about my ability to monitor the vehicle’s charging especially given the increasing number of incidents involving electric vehicles catching fire during or after charging. Proper monitoring of charging status is crucial to avoid potential overcharging and battery degradation.

When turning the vehicle on, it sometimes displays an error in the instrument panel of the”Brake system failure 43 MPH Top Speed” When this error is present, the vehicle has almost no braking capability. One pedal braking is also disabled when this happens. So the only way to stop the car is to mash the brake pedal to the floor like your life depends on it. Turning the vehicle off for 5 minutes and turning it back on seems to clear the issue.

Brake system failure happened the day after I bought the vehicle and the dealer found no issues or errors than another brake failure occurred in one week. This could have caused a major accident to a point where my safety is in fear

Brakes activated in an unwarranted situation. Suddenly stopping in the middle of traffic.

When the vehicle is in reverse, the safety feature that is supposed to prevent you from hitting something mistakenly goes off when there is nothing there. It seizes the car and immediately causes the brakes to go off. The car will feel like it got in a crash. There is no way to un-release it and there is no way to change the settings to prevent it. It is a great safety feature that could really protect me from getting into a crash. But instead at least once or twice a week it simply prevents me from backing out of my driveway in the morning to go to work. Delaying me by 1-2 minutes every day. Very annoying.