Which parts fail
Components named in complaints (automatic emergency braking, adaptive cruise, lane keeping, backup camera).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2021 Honda Civic owners, lightly cleaned up (personal details are redacted by NHTSA).
Driving down the highway about 70 mph and it started to rain so little that I had not even needed the wipers yet. Then out of nowhere with absolutely no warning what so ever the breaks locked up and the car began to slide and was completely unresponsive to any solution possible. The steering wheel was locked in place and the break peddle was so far to the floor I was not able to reach it. After colliding with the propane delivery truck which I was unable to see due to passanger side airbags which inflated unnecessarily with no passanger in the vehicle. After finally coming to a stop I was going to try and catch my breath while I gather my thoughts but unfortunately it was not possible due to the unimaginable amount of smoke that came from the driver airbag in the steering wheel. …
The contact owns a 2021 Honda Civic. The contact stated that while driving, the Apple's car play screen went blank. While merging into the left lane, the Automatic Emergency Braking feature engaged. The vehicle was taken to the local dealer who reset the battery but was unable to duplicate the failure. Upon leaving the dealer and driving 25 MPH, the steering wheel was tight, and the vehicle continued to drift towards the left. The brakes, adaptive cruise control, and stability control warning lights were illuminated. The vehicle was taken back to the local dealer but was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 18,480.
The contact owns a 2021 Honda Civic. The contact stated that while driving at an undisclosed speed, the Lane Keep Steering Assist failed to function as intended. In addition, the contact stated that the steering wheel was sticking. No warning lights were illuminated. The vehicle was taken to two dealers, and the vehicle was diagnosed with steering rack assembly failure. The contact was informed that the steering rack assembly needed to be replaced. The vehicle was not repaired. In addition, the contact stated that the failure was a known failure with the vehicle. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 36,200.
The contact owns a 2021 Honda Civic. The contact stated while making a left turn, they noticed the rearview camera in the center console does not show an image or no notification alert for blind sport warning when making a turn. The contact took the vehicle to the local dealer who inspected the vehicle and inform the contact the failure experience on the vehicle is just the way the vehicle was manufactured and could not repair the issue. The vehicle was not repaired. The manufacture was made aware of the failure. The failure mileage was approximate 400.
My 2021 Honda civic ex' forward collision sensor light flashed mid intersection my brakes locked up causing me to be a victim of a hit and run. As I was in between policies with my insurance therefore I wasn't covered for the accident and I am now suffering financial hardships.. dealership didn't want to hear what I had to say because it was a new car & no recalls were announced at the time.
The contact owns a 2021 Honda Civic. The contact stated while driving on several occasions at approximately 70 MPH, and changing lanes, the Forward Collision Avoidance Automatic Emergency Braking system inadvertently activated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 24,000.
while driving last week with my family, doing some grocery shopping, we got on the highway which is 75mph in our 2021 Honda Civic and it had a catastrophic failure on its ADAS system out of nowhere it stopped and made my car swerve off the road and applied the breaks like it detected a car in front of us, it took us from 75 to 0 pretty darn fast fortunately no one was behind us, after the event im not able to use any features that involve the camera which includes crucial features of the car including cruise control, i can't even see what any info that is supposed to be displayed on the dash, I took it to the dealership where they said that their ADAS system doing this's a common occurrence and that most likely the camera it self will need replacement, i truly believe this to be a very dangerous feature that should be looked into and if the camera is prone to getting messed up like they …
I have had a few incidents where I am driving and the brake signal starts flashing/dinging when I am nowhere near another car. In one instance; the car automatically braked in the middle of the highway with no car in front of me. This could have caused a major accident if I did not react quickly. In addition, I could have gotten major whiplash as I was driving over 40 MPH. I am also having issues with the auto lock feature on the car. Sometimes when I am driving the car will try to lock the doors even though the doors are already locked. It will continuously lock, the only way this issue has stopped is by turning off my auto lock function. I liked have the auto lock function on because it made me feel safe. There have been no warning lamps, messages or other symptoms prior to these incidences happening. …
The front windshield camera that utilizes Honda Sense safety tech keeps misreading certain traffic signals and inadvertently activates the phantom braking. Sometimes it blinks ultimate times to even cause the vehicle to apply it's emergency brakes despite no objects present on or near the intersection(s) of major traffic light routes and or construction sites with very bright lighting. Luckily no other motorists were behind me. The Lane Departure warning feature would also mistake the vehicle for moving over the designated lane when driving down or uphill or in some interstate highways even though the vehicle is maintaining centered lane control. I have consulted my nearest Honda dealership on the matter and was told the manufacturer would have issue a recall for the Honda Safety Sense since they do not have the hardware nor software to resolve the matter in a timely fashion. …
Forward collision warning and braking has falsely activated with no vehicles ahead of car. First, "BRAKE" warning flashed for no reason while driving on a three lane road on Virginia Rt 286 and Rt 50 interchange. Second, driving in right lane, vehicle ahead was taking exit and was clear of my path, car flashed BRAKE warning, then started braking. Third, while using Adaptive Cruise Control (ACC) on highway, a passing car changed lanes into my lane. Due to distance, a car length, and smaller speed difference, emergency brakes activated. However, if a passing car operating at a faster speed (>5 mph est.) the car won't brake. The third problem is annoying as it creates an unsafe situation for people following too close (which they should not). …
Collision Avoidance complaints in other Civic years
Frequently asked questions
How common are collision avoidance problems on the 2021 Honda Civic?
NHTSA has 38 complaints about the driver assistance of the 2021 Honda Civic, 25% of the model year's 150 complaints. The component named most often is automatic emergency braking (26 mentions).
Is there a recall for 2021 Honda Civic collision avoidance problems?
No. NHTSA lists no driver assistance recall for the 2021 Honda Civic, 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 Civic collision avoidance problems start?
Half of the complaints with a recorded mileage happened before about 24,000 miles, and 75% before 25,000 miles.
Is it dangerous?
Owners linked 2 crashes, 1 fire and 0 injuries to driver assistance 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.