2021 Hyundai Sonata Hybrid Engine Problems
Engine complaints account for 24 of 55 total complaints (44%) filed on the 2021 Hyundai Sonata Hybrid, with a median failure mileage of 32,547 miles. No related recalls are listed for this issue.
- Engine complaints
- 24
- 44% of 55
- Crashes reported
- 0
- Fires reported
- 0
- Injuries reported
- 0
- Median mileage
- 32,547 mi
- Related recalls
- 0
Typical engine symptoms owners report
- Owners report the engine overheating alert triggering while driving, forcing them to pull over on highways or exit ramps.
- Coolant levels drop below minimum repeatedly even after topping off, pointing to an internal coolant leak.
- Cabin heater blows cold air, often the first sign that coolant is leaking into the engine or exhaust system.
- White or heavy exhaust smoke appears during acceleration or after switching from battery to gas power, consistent with coolant burning off in the exhaust.
- Some owners describe a blown head gasket diagnosed shortly after warranty expiration, following earlier coolant loss and overheating symptoms.
- A few owners report the hybrid system triggering an engine shutdown while driving, with dashboard warnings about hybrid engine failure.
When 2021 Hyundai Sonata Hybrid engine complaints were filed
First complaint Jan 23, 2023, latest Aug 5, 2026.
Engine recalls for the 2021 Hyundai Sonata Hybrid
No safety recalls on record for this model year.
Engine complaints by Sonata Hybrid model year
Raw complaint counts per model year; newer years have had less time to accumulate complaints.
Frequently asked questions
- How common are engine problems on the 2021 Hyundai Sonata Hybrid?
- Engine complaints make up 24 of the 55 total complaints filed for this model year, or 44%.
- Is there a recall for the 2021 Hyundai Sonata Hybrid engine?
- No related recalls are listed in NHTSA data for this engine problem area.
- At what mileage do these engine problems usually show up?
- The median mileage at failure reported to NHTSA is 32,547 miles.
- What symptoms do owners describe before engine failure?
- Owners commonly report cold cabin heat, dropping coolant levels, and overheating warnings, sometimes followed by white exhaust smoke or a blown head gasket.
- Have these engine complaints led to crashes or fires?
- NHTSA data lists zero crashes, zero fires, and zero injuries tied to these engine complaints.