2021 Honda Passport: false forward collision warnings

Filed Aug 17, 2026 · Driver assistance · 32,000 miles · NC

The contact owns a 2021 Honda Passport. The contact stated that while driving 45 MPH, the Forward Collision Avoidance activated, and the vehicle stopped. The contact stated that the braking was aggressive. The contact stated that the failure was persistent. The contact stated that the vehicle was the only form of transportation. The contact stated that the vehicle was unsafe to use while transporting minor children. The dealer was made aware of the failure. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact stated that an unknown recall repair was performed previously; however, the failure occurred. The manufacturer was made aware of the failure. The failure mileage was approximately 32,000.

Filed Jul 18, 2026 · Driver assistance · CO

The multipurpose front camera on my 2021 Honda Passport failed without warning, causing mutliple Honda sensing safety systems to become inoperative. Warning messages appeared indicating failures of the collision mitigation braking system, adaptaptive cruise control, lane keeping assist system, road departure mitigation system, and other driver assistance features. The vehicle has not been involved in a front end collision and the camera failure was diagnosed by a Honda dealership as requiring replacement of the multipurpose camera assembly. This is a significant safety concern because the failure of a single component disables numerous advanced driver assistance systems that are designed to help prevent crashes. I have learned that similar front camera failures have been reported by owners of other Honda models using comparable Honda sensing technology. Because this failure affects critical safety systems and appears to be more than an isolated incident, I am submitting this complaint so it can be documented and investigated.

Filed Mar 19, 2026 · Brakes, Driver assistance · HI

I purchased a used 2021 Passport the end of May 2025. While driving, the 'collision mitigation braking system' or CMBS would activate the braking system and would intermittently just brake, causing panic for not only myself, but I'm sure drivers behind me for suddenly braking with no imminent threat in from of me. This happened multiple times without receiving any warning or notifications, just suddenly. It would happen without warning, or sometimes nearing a bridge or a cover plate on the road, which almost caused accidents multiple times to get rear ended. I have driven for decades and never felt anxiety until I drove this vehicle for a few months. I felt scared driving this vehicle, feeling uncertain when it would suddenly just brake. Eventually after a few months of driving, I got a reading that said CMBS problem on the screen. I scheduled an appointment with the dealer. The dealer suggested a near $3000 replacement for a camera (on a 2021 vehicle). At the appointment, I ultimately returned this vehicle to the dealer where I bought it and unfortunately lost out on thousands of dollars after having the vehicle about 6 months. I have always liked Honda, and have had 2 prior Hondas, but with this vehicle purchase, I felt the most unsafe I have ever felt in a vehicle, and moving forward will not feel comfortable purchasing Honda.

Filed Sep 24, 2025 · Driver assistance, Electrical · PA

CMBS (Collision Mitigation Braking System) Problem

Filed Sep 7, 2025 · Driver assistance · CA

When I turn on the car, the "BRAKE SYSTEM" warning light appears, along with several alerts that disable all Honda safety features, including: 1. Road Departure Mitigation System Problem 2. Auto High-Beam Problem 3. Adaptive Cruise Control Problem 4. Lane Keeping Assist Problem 5. Collision Mitigation System Problem After taking the vehicle to a Honda dealership, the diagnosis was a failure of the Multipurpose Camera Unit and/or the Millimeter Wave Radar. Unfortunately, this is a common issue affecting several Honda models, including the Clarity, Fit, Pilot, Passport, and CR-V. Due to high demand and limited supply, the camera unit is currently sold out nationwide with no estimated restock date. Repairing this issue is expected to cost approximately $2,600, with no set timeline for when the parts will become available.

Filed Jan 8, 2025 · Driver assistance · 25,950 miles · TX

The contact owns a 2021 Honda Passport. The contact stated while driving at 22 MPH, "The Collision Mitigation Braking System" warning message illuminated. The contact stated the vehicle applied the emergency brakes independently. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer was notified of the failure. The approximate failure mileage was 25,950.

Filed Sep 28, 2024 · Driver assistance, Transmission · MD · crash

- Automatic braking system flashes warnings for no reason, with no cars around me - Parking break hasn’t taken a handful of times - No collision warning when parking brake didn’t take, front end is now damaged ** I have dash cam proof I hit the parking brake before I collided with the vehicle in front of me in the school line. Husband glued the grill pieces together to keep them from overlapping.

Filed Aug 22, 2023 · Driver assistance, Steering · GA

Forward Collision Warning (FCW): At random intervals, the FCW will give a false positive warning of an imminent collision with a car approaching from the opposite direction. This has occurred at various times over the past 2+ years. Comments to this effect to the Honda service representatives have indicated that this anomaly has been reported previously. They have not provided a fix or software update to correct this issue. The event is a safety issue because of the distraction from focusing on the road ahead. Although the automatic braking system has not been employed, the driver may in response to the false warning apply the brakes and cause an accident inadvertently.

Filed May 26, 2023 · Driver assistance · SC

The contact owns a 2021 Honda Passport. The contact stated while driving 30 MPH, the Forward Collision Avoidance system erroneously activated. The contact stated the brake warning light was illuminated. The contact took the vehicle to the local dealer however, the mechanic was unable to duplicate the failure. The contact continued to experience the failure. The contact took the vehicle back to the local dealer and the distance of the Forward Collision Avoidance system was extended. The vehicle was repaired but continued to experience the failure. The contact stated the vehicle had been taken to the local dealer three times, but the vehicle continued to experience the failure. The manufacturer had not been informed of the failure. The failure mileage was unknown.

Filed Apr 28, 2021 · Driver assistance · 4,300 miles · CA

Tl* the contact owns a 2021 honda passport. The contact stated that while driving at various speeds, the collision mitigation braking system inadvertently and forcefully activated and the steering wheel would shake. The brake warning light was illuminated. Norm reeves honda superstore vista (401 w vista way, vista, ca 92083) was made aware of the failure and informed the contact that the collision mitigation braking system activated in error, sensing a possible collision. The contact was also informed that the failure occurred occasionally with curves in the roadway or when a metal sign was detected. The contact was informed that the feature operated as designed. The manufacturer was not notified of the failure. The failure mileage was 4,300.