"How reliable is the 2021 Chevrolet Blazer?"

"Based on 171 NHTSA complaints, the 2021 Chevrolet Blazer has a median complaint mileage of 34980 miles. The most common issue is ELECTRICAL SYSTEM."

"What are common problems with the 2021 Chevrolet Blazer?"

"The most frequently reported component in NHTSA complaints for the 2021 Chevrolet Blazer is ELECTRICAL SYSTEM, accounting for a significant portion of the 171 total complaints filed."

2021 Chevrolet Blazer: Reliability Data

Source: NHTSA — 171 complaints

171

Total Complaints

34,980mi

Median Mileage

ELECTRICAL SYSTEM

Top Issue

Crash Reports

When Do Complaints Happen?

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

14,000 25th Percentile

34,980 Median Mileage

63,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM

ENGINE

UNKNOWN OR OTHER

SERVICE BRAKES

POWER TRAIN

STEERING

FUEL/PROPULSION SYSTEM

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

SUSPENSION

FORWARD COLLISION AVOIDANCE: WARNINGS

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"WHILE DRIVING THE THE WHOLE DASH GOES BLANK FOR A FEW SECOND, THEN THEN IT REBOOTS AND EVENTUALLY MOST OF IT COMES BACK. HOWEVER, IT DID THIS REPEAT THIS CYCLE AND CANNOT TELL IF MY SIGNALS ARE WORKING OR WHAT MY SPEED IS. I HAVE A VIDEO OF IT HAPPENING. THE CAR HAS 2,700 MILES.. I AM TAKING TO A..."

"HEADLIGHTS FLASH OR STAY ON EITHER LOW OR HI BEAM,HATCH OPENS ITSELF, AWD POPING, NOISE IN DASH, SHIFTING INTO AWD BY ITSELF, TRANSMISSION NOT SHIFTING CORRECTLY . THERE IS NO PATTERN AND IT THROWS NO CODES. MAJOR ELECTRIC PROBLEMS. THE KEYLESS ENTRY PAD DIDN'T WORK THE DAY I PURCHASED MY CAR. ..."

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