2021 Chevrolet Blazer Engine Problems

NHTSA component category: ENGINE · data through 09/08/2026

39Engine complaints

30%Of all 130 complaints

#1Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How engine ranks on this vehicle

ENGINE39 · 30%

ELECTRICAL SYSTEM37 · 28.5%

Unspecified / other20 · 15.4%

SERVICE BRAKES18 · 13.8%

POWER TRAIN18 · 13.8%

Share of the 130 complaints citing each category; one complaint can cite several. Full breakdown on the 2021 Chevrolet Blazer overview page.

What owners report

“In September 2023, when getting my vehicle serviced for a routine oil change, I was told there was a leak in my radiator. They replaced…”NHTSA complaint 11701205 — filed 11/24/2025

“Car was running fine yesterday, today does not want to start. Thought it was the battery, bought anew battery. Still wouldn't start. Rest of cat…”NHTSA complaint 11699684 — filed 11/16/2025

“Was informed at today's oil change that my radiator is leaking and it's something that they are seeing a bunch.”NHTSA complaint 11688507 — filed 09/19/2025

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Engine complaints by year filed

Frequently asked questions

Does the 2021 Chevrolet Blazer have engine problems?

Engine is the most-reported problem area on the 2021 Chevrolet Blazer: 39 of 130 complaints on file (30%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2021 Chevrolet Blazer have in total?

130 complaints were on file with NHTSA as of 09/08/2026. Across all categories, 6 involved a crash, 1 involved a fire, 7 reported injuries, and none reported deaths.

What does NHTSA's engine category include?

NHTSA assigns each complaint to standard component categories; this page reports the ENGINE category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 09/08/2026.