2021 Mazda Mazda3: Reliability Data

Source: NHTSA — 66 complaints
66
Total Complaints
ENGINE
Top Issue
4
Crash Reports

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE
18
UNKNOWN OR OTHER
7
ELECTRICAL SYSTEM
6
SERVICE BRAKES
4
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
4
AIR BAGS
4
POWER TRAIN
3
LANE DEPARTURE: BLIND SPOT DETECTION
2
STRUCTURE:BODY
2
FORWARD COLLISION AVOIDANCE: WARNINGS
2

Severity Assessment

4
Crashes
2
Fires
1
Injuries
0
Deaths

Sample Complaint Reports

"PASSENGER SIDE BLIND SPOT WARNING FUNCTIONS SPORADICALLY. IT SOMETIMES DETECTS VEHICLES AND SOMETIMES DOES NOT WHILE DRIVING AT THE SAME SPEED."
"PASSENGER SIDE BLIND SPOT WARNING FUNCTIONS SPORADICALLY. IT SOMETIMES DETECTS VEHICLES AND SOMETIMES DOES NOT WHILE DRIVING AT THE SAME SPEED."
"TL* THE CONTACT OWNS A 2021 MAZDA MAZDA3. THE CONTACT STATED WHILE THE VEHICLE WAS AT A STAND STILL AT A PARKING LOT, WHEN IT CAUGHT FIRE. THE FIRE DEPARTMENT WAS ABLE TO EXTINGUISHED THE FIRE AND FILED A REPORT. THE POLICE WAS AT THE LOCATION BUT DID NOT FILE A REPORT. THE VEHICLE WAS DRIVABLE BUT ..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28