2021 Hyundai Sonata problems and complaints
Owners have filed 135 complaints with NHTSA about the 2021 Hyundai Sonata. The most-reported areas: Engine (34), Unknown Or Other (32), Power Train (25).
Key takeaways
- 135 owner complaints on file with NHTSA.
- 7 involve a crash, 0 a fire, 13 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Engine | 34 | 25% |
| Unknown Or Other | 32 | 24% |
| Power Train | 25 | 19% |
| Fuel/Propulsion System | 21 | 16% |
| Electrical System | 18 | 13% |
| Fuel System | 13 | 10% |
| Gasoline | 13 | 10% |
| Forward Collision Avoidance | 9 | 7% |
| Visibility/Wiper | 8 | 6% |
| Structure | 4 | 3% |
| Air Bags | 4 | 3% |
| Visibility | 4 | 3% |
One complaint can name several components, so shares add up to more than 100%.
Parts for the 2021 Hyundai Sonata
GarageDex's verified specs for this car. Each Buy button searches Amazon for that exact part.
- Battery
- Engine oil
- Oil filter
- Engine air filter
- Cabin air filter
- Wiper blades
- Headlight bulb
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| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2021 Hyundai Sonata 4 DR FWD | 5/5 | 4/5 | 5/5 | 5/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Electrical System - filed 2026-10-23
The left turn signal works intermittently. It has now stopped working about 90% of the time. The multi-function switch was replaced 3 times and I am still having the issue. The signal won't work on the exterior and it won't light up on the interior dash either. This is creating an unsafe driving environment which incre...
Power Train - filed 2026-09-28
My 2021 Hyundai Sonata N Line suffered a catastrophic, sudden total loss of drive power while operating at speed on a public roadway, creating an immediate crash hazard. The vehicle lost forward propulsion and the gear selector flashed a blinking 'R' when reverse was attempted. The vehicle was towed to an authorized de...
Fuel/Propulsion System - filed 2026-09-23
DESCRIPTION OF SAFETY DEFECT & IMMEDIATE HAZARD:My 2021 Hyundai Sonata SEL is currently exhibiting the most severe, catastrophic symptoms of the fuel tank expansion defect covered under NHTSA Campaign 25V796000. The fuel tank has expanded so drastically that it physically warped the structural interior of the cabin, vi...
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More for the 2021 Hyundai Sonata
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.