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ProblemsByVinFile / 2021-CHEVROLET-BLAZERNHTSA data synced 1 day ago
Chevrolet
2021 Chevrolet Blazer problems
The 2021 Chevrolet Blazer has 124 NHTSA owner complaints and 1 active recall campaign on file. Here's the breakdown — what's serious, what's noise, and what a working mechanic would actually do about it.
The 2021 Chevrolet Blazer has 124 NHTSA owner complaints and 1 recall on file (U.S. federal records, as of August 2026). The most-reported system is electrical at 27 complaints, typically surfacing around 30,233 miles (~$850 to repair). Source: NHTSA Office of Defects Investigation.
Solid reliability overall. Common issues are concentrated in a few systems.
0
Critical
1
Severe
0
Moderate
Should you avoid this 2021 Blazer?
Acceptable — with caveats
Worth owning if you verify the specific issues below before you buy.
Reliability score 7.4/10 — around the segment average
1 recall campaign on file
Our read of the federal NHTSA complaint and recall record for this exact year and model —
not a substitute for a pre-purchase inspection. How we score.
NHTSA crash-test safety ratings
5 / 5 overall
Overall★★★★★5/5
Frontal crash★★★★★5/5
Side crash★★★★★5/5
Rollover★★★★★4/5
Driver-assist features on the tested model:
Electronic stability control: Standard · Forward collision warning: Optional · Lane departure warning: Optional
Source: NHTSA New Car Assessment Program — tested configuration: 2021 Chevrolet Blazer SUV AWD. Stars rate crash protection in NHTSA's tests, not overall reliability — see the owner-complaint data below for what actually goes wrong.
Buying a used 2021 Chevrolet Blazer? Check these first
Here's what this model is known to do — so you can inspect for it, price it in, or
make the seller fix it before you sign.
What to inspect on this specific car
electrical — 27 owner reports
· tends to show around 30,233 mi · ~$850 to fix
brakes — 17 owner reports
· ~$450 to fix
engine — 16 owner reports
· tends to show around 64,667 mi · ~$3,100 to fix
powertrain — 15 owner reports
· tends to show around 75,623 mi · ~$2,500 to fix
⚠ The one to take seriously: steering is flagged
severe on this model
, showing up around 24,000 mi.
Inspect it closely on a test drive.
Recalls to confirm are done
Run the VIN from the listing — 1 active recall on this model. Recall repairs are always free.
Verdict for buyers: 7.4/10 model. The priciest documented failure is
engine (~$3,100) — get the
seller's service records for it or inspect closely. Otherwise an average-risk used buy at a fair price.
We tell you what this model is known for and what to inspect — a vehicle-history report
tells you what this exact car has been through. Smart buyers get both.
A noise, a warning light, a repair quote, "should I buy this?" — get an answer grounded in
this vehicle's actual NHTSA record, not generic advice.
Dash light, leak, worn part — snap it and we'll read it against this car's record.
Photo attached — type a question or just hit Ask.
Answers use this vehicle's NHTSA complaint & recall record — owner-reported and unverified, not a diagnosis. Verify anything safety-critical with a mechanic.
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What owners are saying
recent NHTSA-filed complaints · verbatim
2021 Blazer· engine
Radiator failure caused power steering assist to not function properly and insufficient vehicle heat function. Engine electric fan would run continuously after vehicle shutdown.
On [XXX], I was driving my Blazer up to our local Museum to grab some information. The Museum is about a mile and a half from my house. When I had left my house, the car was driving like normal. I pulled into a parking spot at the Museum, and I went to shut the vehicle off, and…
For about a week and a half my car had made a high pitched wheezing/hubbing sound when started cold. This occurred at all temperatures cold and warm. Yesterday December 13th I went to run some errands and about a mile into my drive my 2021 3lt 3.6 V6 Chevrolet Blazer lost the…
"Steering assist reduced" message was displayed. At the same time the temperature gauge stopped working and after I shut the car off, the motor fan ran full force for 10+ minutes. Shows no check engine light.
Had a problem with your 2021 Chevrolet Blazer?
File a complaint with NHTSA → It's free and official — owner filings are what build the federal safety record behind this page.
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles
If a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly restrain an occupant in the event of a crash, increasing the risk of injury.
Fix: GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began January 29, 2021. Owners may contact GMC customer service at 1-800-462-8785, Cadillac customer service at 1-800-458-8006, or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202322230.
Common questions
Is the 2021 Chevrolet Blazer reliable?
Mostly yes. With a reliability score of 7.4 out of 10 based on 124 owner complaints filed with NHTSA, the 2021 Chevrolet Blazer is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
Should you avoid the 2021 Chevrolet Blazer?
The 2021 Chevrolet Blazer is acceptable, with specific caveats. Worth owning if you verify the specific issues below before you buy. The record behind that call: Reliability score 7.4/10 — around the segment average; 1 recall campaign on file. This is our read of the federal complaint and recall data — not a substitute for a pre-purchase inspection.
What should I check before buying a used 2021 Chevrolet Blazer?
Inspect the electrical first — it's the most-reported issue on this model, with 27 owner complaints filed. Typical failure occurs around 30,233 miles. Average repair cost runs about $850 at an independent shop. Also confirm any open recalls have been completed by running the VIN, and ask for service records covering the problem areas listed above.
Is the 2021 Chevrolet Blazer a good used car to buy?
It scores 7.4 out of 10 on our NHTSA-based read of 124 owner complaints. The main thing to watch is electrical. Typical failure occurs around 30,233 miles. Priced fairly and clean on inspection, it's a reasonable used buy. Our data covers what this model is known for — pair it with a vehicle-history report on the VIN to see what that specific car has been through.
What's the most common problem on the 2021 Chevrolet Blazer?
Based on NHTSA records, the most-reported issue is electrical, with 27 complaints filed. Typical failure occurs around 30,233 miles. Average repair cost runs about $850 at an independent shop.
What's the most expensive thing that goes wrong?
The electrical is one of the costlier repair items. Average repair cost runs about $850 at an independent shop. Typical failure occurs around 30,233 miles. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my Chevrolet Blazer has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2021 Chevrolet Blazer?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 124 complaints on file and the costliest repair averaging $850, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans are not always better value.
Recall and complaint data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database, last synced 1 day ago. Verify the raw federal record at
nhtsa.gov/vehicle/2021/Chevrolet/Blazer.
Editorial commentary written by ProblemsByVin contributors and reviewed by ASE-certified mechanics.
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