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What 134 owners told NHTSA about the 2021 Honda Civic Si

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (134)Crash / fire / injury (6)Steering (57)Driver assistance (32)Brakes (18)Electrical system (17)Lane Departure (11)Airbags (8)Speed control (6)Engine (5)Fuel system (4)Seats (3)

6 of 134 complaints match · crash/fire/injury only · clear filters

Apr 22, 2026EngineFire

While driving the car began to smoke from under hood and engine stopped. Interior and under hood flooded with smoke and fire under hood. This was a major fire, fire company put it out. No repairs were made or needed on car since purchase October 2024.

NHTSA ODI 11733110

May 9, 2025Electrical systemBrakesDriver assistanceCrash

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

Mar 13, 2025AirbagsCrash2 injuries

The contact owned a 2021 Honda Civic. The contact stated that his wife was driving at 30-35 MPH, when another vehicle suddenly merged in front of the vehicle causing a T-bone collision. The vehicle was pushed into the middle of the road from the impact where it came to a stop. All air bags deployed. However, the front passenger-side air bag deployed backward onto the front windshield instead of deploying forward. The contact was unsure whether there was a warning light illuminated. A police report was not filed. EMS was called however, refused to take the contact and his wife to the hospital. The contact's wife sustained unknown injuries and was pending an MRI. The contact sustained whiplash and no medical attention was sought. The insurance company towed the vehicle to a storage location and deemed the vehicle a total loss. The manufacturer was notified of the failure. The failure mileage was 78,000.

NHTSA ODI 11648117

Jan 25, 2024SteeringCrash

This vehicle has started to randomly start pulling to the left or right as it's moving at a high rate of speed. It was diagnosed by the dealer to need the steering rack replaced. This is the same issue the 2022-2024 Honda Civic are being recalled for. The dealership stated that they have seen a lot of 2021 model coming in for this same issue so I am concerned it could involve the 2021 models as well. It has become very dangerous to drive.

NHTSA ODI 11567795

May 22, 2023Speed controlBrakesDriver assistanceCrashFire

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

May 11, 2022Speed controlCrash

was in reverse backing into parking spot. my foot was on the break; however, the car accelerated rapidly resulting in hitting a post. there were no warnings that registered took it to Honda and reported, they indicated they were not aware of this issue and did not run diagnostics as requested

NHTSA ODI 11464241

Working with the data? Download all 134 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2021 Honda Civic Si verdict →