2021 Chevrolet Blazer problems and complaints
Owners have filed 133 complaints with NHTSA about the 2021 Chevrolet Blazer. The most-reported areas: Engine (41), Electrical System (38), Unknown Or Other (20).
Key takeaways
- 133 owner complaints on file with NHTSA.
- 6 involve a crash, 1 a fire, 7 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Engine | 41 | 31% |
| Electrical System | 38 | 29% |
| Unknown Or Other | 20 | 15% |
| Service Brakes | 19 | 14% |
| Power Train | 18 | 14% |
| Fuel/Propulsion System | 17 | 13% |
| Steering | 15 | 11% |
| Forward Collision Avoidance | 7 | 5% |
| Tires | 5 | 4% |
| Suspension | 4 | 3% |
| Engine And Engine Cooling | 3 | 2% |
| Lane Departure | 3 | 2% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2021 Chevrolet Blazer SUV AWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2021 Chevrolet Blazer SUV FWD | 5/5 | 5/5 | 5/5 | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Service Brakes,engine - filed 2026-09-17
Vehicle Information: 2021 Chevrolet Blazer 2.5L engine, VIN [XXX]. Odometer 118000 miles.Description of Incident: While operating the vehicle, the mechanical brake vacuum pump experienced a catastrophic internal failure. The drive gear housing shattered violently without warning, shearing off the end of the connecting ...
Wheels,engine - filed 2026-09-16
My 2021 Chevrolet Blazer has experienced repeated problems involving the cooling system and is now exhibiting recurring symptoms that concern me about the vehicle’s reliability and safety. In 2023, the vehicle required a radiator/cooling-system repair. In 2024, it again required radiator/cooling-system repair, which w...
Engine And Engine Cooling - filed 2026-09-09
The contact owns a 2021 Chevrolet Blazer. The contact stated that a technician identified a radiator leak during an emissions test after smelling an abnormal coolant odor. The technician confirmed that the coolant had leaked from the vehicle. Prior to the discovery by the technician, the contact’s husband observed whit...
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More for the 2021 Chevrolet Blazer
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.