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What 49 owners told NHTSA about the 2021 Mazda Mazda3 Sedan

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 (49)Crash / fire / injury (4)Engine (18)Driver assistance (7)Electrical system (6)Airbags (4)Brakes (4)Lane Departure (3)Transmission & drivetrain (3)Body & structure (2)Fuel system (2)Speed control (2)

4 of 49 complaints match · Airbags · clear filters

Sep 4, 2022Airbags

Air bag malfunction light comes on a and goes off multiple times while driving

NHTSA ODI 11482854

Jun 11, 2022AirbagsCrash1 injury

The vehicle was badly rear ended and the airbags didn't deploy. The dashboard indicated an "airbag malfunction" after the collision happened. The failure of the airbags put myself and my passengers at serious risk; if we weren't wearing our seatbelts, which we were, we would have been gravely injured. The vehicle is less than a year old and still under warranty.

NHTSA ODI 11468801

Apr 8, 2022Airbags

My car started to show a warning on the dashboard that the airbag system is malfunctioning. The alarm would come on for a few seconds, then turn off, then repeat like that multiple times every drive. At the time it started, my car had less than 500 miles on it, and it continued after that until I got it fixed. I took it to the Mazda dealership where I bought it, and they said it was a short circuit to the driver's side airbags. They told me that could have caused the airbags to deploy prematurely or not at all in an accident. I am also a part of a Mazda 3 community and am active on the forums, and in the last month I have seen at least 30-40 other 2021 Mazda 3 owners also report the same exact error code, with the same short circuit issue being cited as the problem by the dealership. Parts are on backorder for weeks for most of these owners, and some of them were told by the dealership to keep their car while they waited for the part, whereas my own dealership told me it was unsafe to drive the car and to have it towed to the dealership instead.

NHTSA ODI 11460158

Dec 18, 2021Airbags

Instrument panel display shows a warrning message: Air Bag System Malfunction. Have the Vehicle inspected.

NHTSA ODI 11444268

Working with the data? Download all 49 complaints as CSV · fetched from NHTSA July 18, 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 Mazda Mazda3 Sedan verdict →