"How reliable is the 2021 Mazda Cx-30?"

"Based on 127 NHTSA complaints, the 2021 Mazda Cx-30 has a median complaint mileage of 13450 miles. The most common issue is ENGINE."

"What are common problems with the 2021 Mazda Cx-30?"

"The most frequently reported component in NHTSA complaints for the 2021 Mazda Cx-30 is ENGINE, accounting for a significant portion of the 127 total complaints filed."

2021 Mazda Cx-30: Reliability Data

Source: NHTSA — 127 complaints

127

Total Complaints

13,450mi

Median Mileage

ENGINE

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

3,100 25th Percentile

13,450 Median Mileage

30,590 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE

ELECTRICAL SYSTEM

UNKNOWN OR OTHER

VISIBILITY/WIPER

POWER TRAIN

VEHICLE SPEED CONTROL

SERVICE BRAKES

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

FORWARD COLLISION AVOIDANCE: WARNINGS

FUEL/PROPULSION SYSTEM

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"TL* THE CONTACT OWNS A 2021 MAZDA CX-30. THE CONTACT STATED WHILE DRIVING 3 MPH, THE VEHICLE LOSS MOTIVE POWER. THE CONTACT STATED THAT THE LOW VOLTAGE 12-V CHARGE WARNING LIGHT WAS ILLUMINATED. THE CONTACT STATED A BYSTANDER ASSISTED TO JUMP START THE VEHICLE. THE CONTACT CONTINUED DRIVING TO HER D..."

"AFTER TURNING LEFT AT A SIGNALED INTERSECTION ONTO A HIGHWAY THE AUTOMATIC BRAKING ENGAGED AND THE CAR SKIDDED TO A STOP IN THE MIDDLE OF THE LANE. LUCKILY NOBODY WAS BEHIND US. THERE WAS A CAR ABOUT 4 CAR LENGTHS AHEAD THAT WAS GOING THE SAME SPEED AND WAS NOT STOPPED. I PULLED OVER AND CHECKED THE..."

"Sudden, enexpected emergency braking when there was no vehicle or any other obstruction in front of me. Luckily, the distance between me and the car behind me was great enough to prevent me from being rear ended."

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