2021 Mazda Mazda3 problems, complaints & recalls
Most-reported problem areas: Engine (17) · Service Brakes (5) · Power Train (4)
🧭 Reliability snapshot
Compared against other Mazda Mazda3 model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (1)
Tires:valve 2021-02-22 · campaign 21V101000 · 599 vehicles
Defect: Mazda North American Operations (Mazda) is recalling certain 2021 Mazda3 and CX-30 vehicles. Air may suddenly leak from the tire air valve.
Risk: A sudden air leak from the tire air valve may cause a loss of vehicle control while driving, increasing the risk of a crash.
Fix: Mazda will notify owners, and dealers will replace all four tire air valves with new parts, free of charge. The recall began April 6, 2021. Owners may contact Mazda customer service at 1-800-222-5500 Option 4. Mazda's number for this recall is 4721B.
Service bulletins (634)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-09-17 · SA-042-26a · Service Bulletin/Repair Instructions
mazda connected services - frequently asked questions (faq) this service alert supersedes the previously issued sas listed below. the changes are noted in red text. sa-042/26 06/30/26 description frequently asked questions (faq) index general questions mazda connect indication setup and getting st
Electrical System 2026-09-11 · SA-041-26a · Service Bulletin/Repair Instructions
description if you encounter any type of electrical concern (e.g, dead battery, engine no start, dtc(s) stored...), interview the customer before proceeding with normal mgss diagnosis by asking if any aftermarket devices have been installed. aftermarket devices may be the cause of the electrical con
Unknown Or Other 2026-09-10 · SA-038-26b · Service Bulletin/Repair Instructions
this service alert supersedes the previously issued service alert listed below. the changes are noted in red text. sa-038/26 08/18/26 and 06/15/26 description some customers may complain about any of the following: 1. infotainment center display does not provide the authorization code (otp) during t
Unknown Or Other 2026-09-04 · SA-038-26a · Service Bulletin/Repair Instructions
this service alert supersedes the previously issued service alert listed below. the changes are noted in red text. sa-038/26 06/15/26 description some customers may complain about any of the following: 1. infotainment center display does not provide the authorization code (otp) during the mymazda a
Unknown Or Other 2026-08-20 · SA-054-26 · Service Bulletin/Repair Instructions
this service alert supersedes the previously issued service alerts listed below: the changes are noted in red. infotainment reboot with navigation card installed this service information is no longer valid. refer to the following updated technical service bulletins: cx-5 / cx-9: 16-002/23 - updated
Unknown Or Other 2026-08-19 · SA-039-26a · Service Bulletin/Repair Instructions
this service alert supersedes the previously issued sa(s) listed below. the changes are noted in red text. sa-039/26 06/15/26 mazda connect symptom troubleshooting description customers having mazda connect concerns should have their vehicle repaired using the following repair procedure.
Showing the 6 most recent of 634 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-10-13 · Electrical System“while driving to work, the dashboard displayed “charging system malfunction, pull over.” the driver pulled over safely. the vehicle has electric power steering, so a loss of charging power while driving could reduce steering assist and cause the vehicle to stall in traffic. this happened three days after a mazda dealer replaced the front passenger…”
2026-10-08 · Suspension“vehicle: 2021 mazda mazda3 vin: [xxx] mileage at failure: 111,777 date the problem started: [date you first heard the clunk] location: [town], [xxx] crash / fire / injury / death: no was the vehicle moving? yes component: suspension: front (lower control arm) description: the front passenger-side lower control arm on my 2021 mazda3 failed at 111,…”
2026-09-28 · Power Train“making sharp right turn out of parking lot under hard acceleration, car suddenly made terrible grinding sound that shook the whole car. continued driving, within another quarter mile the whole car started shaking again with loud noise. had car towed to mazda where they discovered that the rear differential had failed. rear differential replaced und…”
2026-09-28 · Engine“low engine oil message appeared on dash. had car towed to mazda. had valve stem seals replaced under warranty. …”
2026-09-28 · Service Brakes · 45,946 mi“car made grinding sound with notable vibration when starting to move after shifting into drive. felt like brakes weren't releasing. had car towed to dealership where they diagnosed that the front left brake shim was damaged and making contact with the rotor, had to pay to fix it out of pocket.…”
2026-01-25 · Power Train“my rear differential case cracked, anytime the four wheel drive system was engaged the entire drivetrain would lock up. luckily we were only on side roads so going less than 30 mph if we had been on the highway when this happened we could have been in an accident or lost control. the dealer did confirm the problem and it was fixed under an exte…”
2025-10-27 · Suspension“at 31,000 miles the control arm lower ball joints are torn on both lower. they must be replaced. this is a safety hazard. this should not be an issue with low mileage on this car.…”
2025-05-27 · Power Train“i was driving when all the sudden there was a loud bang sound. the differential housing cracked. the when awd is demanded the rear diff was was locking up instead of engaging. luckily we were just on city streets and not on the highway as this rear wheel locking up could cause a crash. mazda wasn't very helpful with the replacement. luckily i had a…”
2025-04-23 · Engine“spontaneous loss of power while driving on highway. check engine light came on. speed limited by car. continues to vibrate especially at idle from cold start. code p0304 intermittently popping up. …”
2025-02-28 · Vehicle Speed Control · 💥 crash“during the incident, the vehicle exhibited an uncontrollable malfunction—the steering wheel suddenly jerked sharply to the right while accelerating violently, leaving me unable to steer or brake effectively, the car was looking forward. the car ultimately came to a stop upon colliding with a truck parked diagonally in front of me. after impact, i o…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.