2021 Hyundai Sonata Pre-Purchase Inspection Checklist
Model data compiled from public NHTSA records; may be incomplete, inaccurate, or out of date. General information, not professional advice — see Terms.
One honest thing before you start
We're car-data nerds, not mechanics. This checklist is general information — not professional advice — built from real recall records and thousands of owner complaints to make you a sharper shopper. Think of it as triage, not a diagnosis.
Before any money moves, get an independent inspection from a qualified mechanic (typically $100–$250). Our data comes from public sources and may be incomplete, inaccurate, or out of date — no checklist catches everything.
So here's the deal: use this to decide whether a car is worth that inspection. You're evaluating and buying the car entirely at your own risk — we're not liable for anything this checklist misses, anything it gets wrong, or any loss resulting from your purchase decision. Fair?
Known issues for the 2021 Sonata
5
Engine complaints Red flag
Watch the temperature gauge and warning lights on a long test drive, and look for leaks under the engine. (34 complaints filed for this model-year.)
based on 34 NHTSA complaints
Power Train complaints Check
Note any hesitation, harsh shifting, or slipping during city and highway driving. (24 complaints filed for this model-year.)
based on 24 NHTSA complaints
Fuel/Propulsion System complaints Red flag
Note any stalling, hesitation, or fuel smell on the test drive, and verify that open fuel-system recalls were completed. (21 complaints filed for this model-year.)
based on 21 NHTSA complaints
Electrical System complaints Check
Test all electronics — lights, windows, infotainment, and driver aids — and confirm no warning lights stay on. (17 complaints filed for this model-year.)
based on 17 NHTSA complaints
Fuel System complaints Check
Note any stalling, hesitation, or fuel smell on the test drive, and verify that open fuel-system recalls were completed. (13 complaints filed for this model-year.)
based on 13 NHTSA complaints
Verify on NHTSA → · How we get our data →
22 additional complaints were filed without a specific component.
Open recalls
4
Visibility Red flag
A windshield that detaches from a vehicle during a crash can increase the risk of injury.
Fuel System, Gasoline Red flag
A melted fuel tank can leak, increasing the risk of a fire.
The 31-point checklist
31
0 / 31 checked · 0 red flags ·
Before you go
We may earn a commission — it keeps the checklist free.
Check the VIN history on EpicVIN
Check it on CarFax (we don't earn from this)
Get an OBD2 scanner DEMO
Paperwork & history
Exterior & wheels
Interior & electronics
Under the hood
Test drive (15+ min, city + highway)
This tells you whether the car deserves a pro inspection (typically $100–$250) — it's not the inspection.
2021 Sonata–specific issues
Your verdict
Keep inspecting — you're under halfway. The red-flag items matter most.
No red flags? Nice. A pro's eyes on it before your money moves is still the play.
Two red flags just saved you the inspection fee. Plenty more cars out there.
We may earn a commission — it keeps the checklist free.
Frequently asked questions
How many recalls does the 2021 Hyundai Sonata have?
NHTSA lists 4 recalls for the 2021 Sonata. The most serious involve Fuel System, Gasoline (21V524000) and Visibility (21V00M000). Ask the seller for proof each recall was completed.
What are the most common complaints about the 2021 Sonata?
The top complaint areas are Engine (34 complaints) and Unknown or Other (32 complaints), out of 133 total complaints.
What should I check before buying a used 2021 Sonata?
Run through the full inspection checklist below, verify any open recalls were completed, and get an independent pre-purchase inspection. Pay special attention to Engine, which drew 34 complaints for this model-year.