Which parts fail
Components named in complaints (service brakes, ABS, rotors and pads, parking brake).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2021 Honda Accord owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2021 Honda Accord. The contact stated while driving approximately 60 mph, the steering wheel and brakes failed to function. The contact stated no warning light was illuminated. The contact stated he drove into a side rail and stretched the driver side panel of the vehicle. The contact also stated the rear view camera was not functioning. The air bags did not deploy. The contact stated he did not have any injuries nor seek medical attention. No police report was filed. The contact he was able to drive to his residence but continued to experience the failure on the steering wheel and multiple warning lights were illuminated. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was approximately 38,000.
The contact owns a 2021 Honda Accord. The contact stated that while driving at 60 MPH, the vehicle's auto braking applied without warning. The vehicle was rear-ended by a possible 2024/2025 Buick Envista. The driver of the Buick left the scene of the crash. The brake warning light was flashing. The contact stated that the failure was related to NHTSA Action Number: EA24002 Forward Collision Avoidance. There were no reported injuries, air bag deployment or fire. A police report was filed. The driver was able to continue driving. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was 71,080.T he VIN was invalid.
The contact owns a 2021 Honda Accord. The contact stated while driving 45 MPH, the vehicle was shuddering and vibrating with an abnormal sound. The contact stated that while shifting into reverse there was a loud roaring sound coming from the brakes. There were no warning lights illuminated. The contact drove the vehicle to the dealer to be diagnosed. The contact was informed that the rear rotors need to be replaced and that the brakes were overheating. The vehicle was repaired but the sound from the brakes returned. The manufacturer was notified of the failure. The failure mileage was approximately 21,000.
The contact owns a 2021 Honda Accord. The contact stated while driving at approximately 30 MPH, the vehicle stalled. The braking system warning light was illuminated. The failure had occurred on several occasions. The vehicle was taken back to the residence. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 77,156.
I was driving northbound in on I15 in Salt Lake City when a Home Depot Bucket blew into my lane. I slowed down to change lanes when the Collision Mitigation Braking System (CMBS) deployed without warning, bringing my car to an almost stop causing a semi tractor trailer to hit me from behind.
My car is not even 1 year old and I have been having problems with my rear brakes. They squeak or grind when I am in reverse and with my foot on the brake pedal to back out of a parking spot or drive way etc. I have taken it to the dealership, Right Honda-Scottsdale Az, 3 different times. They said they could not reproduce the sound. The service guy on my first visit said that if it continues they should replace rear brake pads and deglaze the rotars.Never happened. Left it there overnight, at Honda Corps direction, again the same thing. I spoke with Patrick at Honda and I sent him an email with a video of the sound from outside the car as well as inside. He got back to me last week and basically said there is nothing they can do. …
What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle's collision avoidance automatic braking system is malfunctioning. It engages unexpectedly while the vehicle is moving with normal traffic flow. The system is still installed and fully available for inspection upon request. How was your safety or the safety of others put at risk? The automatic braking system activates suddenly and without cause while I am driving at typical speeds (approximately 40-60 mph) with the flow of traffic. This unexpected braking creates a serious risk of rear-end collisions, both endangering me and putting other drivers at risk of crashing into my vehicle from behind. Has the problem been reproduced or confirmed by a dealer or independent service center? …
This has been reported one time before but the situation has gotten worse when driving at approximately 60ish miles per hour but it starts doing it about between 50 and 70 mph when driving and the car is using the regular engine not the EV section. You will randomly lose the ability to accelerate and you have to remove your foot from the gas let the engine slow and then re-accelerate now for the second time as I'm driving I lose the ability to accelerate at all and no matter what I do the car will slow almost every warning light on the dash comes on and there are 11 different warnings I've uploaded photos of a few I have a video though also and you lose complete power and ability to drive warning lights such as power steering problem emissions problem powertrain problem all of those are part of what turns on if you try to move the vehicle it will not move unless it is an EV mode and …
I have only had this car 4 months, if that long. I have put very few miles on it. Driving home from work, at most 35 mph, there was a loud thud from what seemed the floorboard followed by a sharp slam of the brakes that i could not control. Many of the instrument warning lights came on. some flashed, some stayed on. I was able to pull onto the shoulder of the road to call for help. However, upon trying to put the car into gear again, it would not move. This is very very disappointing as it was purchased at not only an expensive price, but bought with a promise of your Honda dealership. It is noteworthy that i had just returned home from a trip a day or two prior to this happening. Had this happened unexpectantly in six lanes of traffic, it would have certainly caused an accident or worse. …
I was driving home in the rain and felt the car automatically braking when there was no car or object in front of me. The car was also slow to accelerate because the brakes were automatically applied. 5 miles later numerous warnings appeared on the dash and the following error messages came through my Hondalink app: Electric Parking Brake Problem, CMBS Problem, Adaptive Cruise Control Problem, and RDM Problem. Several times during this drive home the brakes automatically applied without any intervention from me or roadway object. I almost got rear-ended once when a car behind me had to slam on its brake when my car automatically braked without me doing anything. This is a very dangerous condition that should be looked further into as multiple drivers have reported brakes being applied without driver intervention or an apparent road hazard. …
Brake complaints in other Accord years
Frequently asked questions
How common are brake problems on the 2021 Honda Accord?
NHTSA has 31 complaints about the brakes of the 2021 Honda Accord, 13% of the model year's 245 complaints. The component named most often is disc › rotor (1 mentions).
Is there a recall for 2021 Honda Accord brake problems?
No. NHTSA lists no brakes recall for the 2021 Honda Accord, though it has 4 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2021 Honda Accord brake problems start?
Half of the complaints with a recorded mileage happened before about 38,000 miles, and 40% before 25,000 miles.
Is it dangerous?
Owners linked 3 crashes, 0 fires and 0 injuries to brakes problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.