What 134 owners told NHTSA about the 2021 Honda Civic Si

Cruise control does not disengage upon electronic parking brake being engaged while moving, causing the car to accelerate aggressively after the brake is released. While it does disengage after enough speed is lost, it should disengage immediately as it does when the brake pedal is tapped

NHTSA ODI 11745360

Nov 9th, 3:00pm, Fruitridge Rd 35 mph, driving with foot on the gas The safety brake feature overrode my ability to drive by forcefully coming to a complete stop while flashing 'brake' messege appeared on dashboard. No car, item or person was in front of me. The car behind me (who was also going around 35 mph) almost hit me and drove off angrily.

NHTSA ODI 11699460

Steering wheel sticks once at highway speed, wheel turns but with a glitch

NHTSA ODI 11666789

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.

NHTSA ODI 11659892

On multiple occasions my car has applied the brake while driving on the highway as well as my caliper has become frozen and I have replaced brakes 3 times in less than one calendar year. I have all old brakes that have needed to be replaced and there is uneven wear on them.

NHTSA ODI 11632366

I have had dozens of incidents where I will be driving down the road and my car will just break for no apparent reason. It is totally random and at times terrifying. It happens with no other vehicles in front of my vehicle as well as while I am just driving in traffic with cars behind me. Many times, after it happens initially, I cannot accelerate the car due to the breaks locking up. I have to put the car in park and then drive to accelerate. I have asked my service providers at HONDA the dealership about this, and they have no idea why this is happening. This is so dangerous and frightening.

NHTSA ODI 11626872

There is a warning flash to brake when there is no vehicle or anything in front or alongside. This has happened several times. I am concerned if vehicle is safe to drive.

NHTSA ODI 11610839

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.

NHTSA ODI 11604677

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. I have not taken my car to the dealer or independent service center due to the cost of high cost the issue. I am open to someone coming to inspect the car as long as it is free of charge.

NHTSA ODI 11600482

The front sensor is too sensitive. If there is another car using a turn lane, the Civic will try to brake and will not pass the car. If another car is ahead on a curve, the automatic braking kicks in. This tends to only happen when using cruise control. It is dangerous on the freeway. The sudden braking could cause me to be rearended. I've been lucky, so far, and have only received dirty looks from the drivers that were behind me as they passed. Since it doesn't happen every single time, there seems no way to reproduce it. No one has inspected it for defects. No warning lights, beeps or messages appear before the braking starts. This has been happening since I first bought the car in 2022, but seems to be more frequent now. Probably the reason it was returned... in my opinion.

NHTSA ODI 11587708

The front sensor is too sensitive. If there is another car using a turn lane, the Civic will try to brake and will not pass the car. If another car is ahead on a curve, the automatic braking kicks in. This tends to only happen when using cruise control. It is dangerous on the freeway. The sudden braking could cause me to be rearended. I've been lucky, so far, and have only received dirty looks from the drivers that were behind me as they passed. Since it doesn't happen every single time, there seems no way to reproduce it. No one has inspected it for defects. No warning lights, beeps or messages appear before the braking starts. This has been happening since I first bought the car in 2022, but seems to be more frequent now. Probably the reason it was returned... in my opinion.

NHTSA ODI 11587710

The front sensor is too sensitive. If there is another car using a turn lane, the Civic will try to brake and will not pass the car. If another car is ahead on a curve, the automatic braking kicks in. This tends to only happen when using cruise control. It is dangerous on the freeway. The sudden braking could cause me to be rearended. I've been lucky, so far, and have only received dirty looks from the drivers that were behind me as they passed. Since it doesn't happen every single time, there seems no way to reproduce it. No one has inspected it for defects. No warning lights, beeps or messages appear before the braking starts. This has been happening since I first bought the car in 2022, but seems to be more frequent now. Probably the reason it was returned... in my opinion.

NHTSA ODI 11587717

The vehicle has on numerous occasions performed automatic braking when no cars are near the front. This is causing the car to break abruptly and I’m fearful that a vehicle to the rear of me will collide due to the erratic and forceful application of the breaks.

NHTSA ODI 11583725

While driving on a city street at about 25 to 30 MPH with no cars or people in front of me and on a clear day, my Civic's Collision Mitigation Braking System flashed "Brakes" on my heads up display and at the same time, it forcefully applied the brakes without me touching the brake pedal. This has happened to me at least twice in six weeks. In both instances, I tried to press on the gas pedal, but it did not let up on the brakes right away. I was nearly rear-ended by other cars both times, putting me and others at risk. I took the car to the dealership, and they told me they couldn't find any issues or codes, nor could they replicate the problem.

NHTSA ODI 11580981

Driving down the road sunny, dry roads, no vehicles around, car starts flashing brake and slams on break has happened 3 or 4 times. Also, Diver assist warning lights keep coming on with radar obstructed. Honda please do something about this before someone gets hurt. I am a single mother and loved this car until recently. I don't have the money to pay the dealership to run diagnostics and lie and say they don't know what's wrong because they cant make it happen again.

NHTSA ODI 11558876

What is going down the highway and my car almost went into oncoming traffic

NHTSA ODI 11549147

Car will display BRAKE on the dashboard, and automatically brake without an object in front of vehicle, causing vehicles to have to slam on their brakes to avoid collision. Has happen multiple times. Dealership was unable to replicate the problem as it is very unpredictable and does not have any consistency as to when it happens.

NHTSA ODI 11535830

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.

NHTSA ODI 11527434

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. I jumped out not sure if it was on fire and assessed the situation and learned that the smoke was just coming from the steering wheel so I did my best to get it out. Which took bottles of water poured into the office steering wheel to stop the cap smoking.

NHTSA ODI 11523210

Automatic Emergency Braking (AEB) system alerted and engaged emergency braking on a clear road when there was no obstacle in the vehicle path.

NHTSA ODI 11518971

the vehicle has brakes with out cause. Two times I was on the street no cars in sight and the car just brakes without notice or cause. Then it happened again yesterday on the freeway. It was raining no cars close and it just brakes again in the middle of the freeway.

NHTSA ODI 11511661

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. Not sure if other 10th generation Honda Civic owners are experiencing the anomaly but it’s a monthly occurrence.

NHTSA ODI 11501974

Rodents chewed thru the main computer cable while car was parked in our car port. When I went to start car it started but immediatley the warning lights on dash began flashing that the road assist features, brakes and steering were not operating.Called road side assistance for a tow to Arrowhead Honda were they replaced main computer cable and reprogrammed computer. This is the second time this has happened. I think the manufacture should change the exterior coating on the cable should be changed to a material that rodents are not attracted to.

NHTSA ODI 11489633

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). Additionally, my brain is processing the situation faster than the HONDA SENSE can, Honda needs to expand their recall from Accord, CR-V, and Pilot to ALL vehicles with HONDA SENSE.

NHTSA ODI 11485030

I experienced a false positive forward collision alert warning and subsequent, brief automatic emergency braking during two (2) episodes. Fortunately, my safety nor any surrounding motorists' safety was not at risk. The problem was not reproduced or confirmed by the dealer though my car ADAS was inspected by them. Of the five episodes, I only recorded the last three episodes which did not include an automatic emergency braking component. The episodes only feature the collision warning alert. They are as follow: 02/21/2022, 1930; 02/22/2022, 0805; and 04/01/2022, 0810.

NHTSA ODI 11472512