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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)

2 of 134 complaints match · Speed control · crash/fire/injury only · clear filters

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 →