2021 Hyundai Sonata Hybrid: Reliability Data

Source: NHTSA — 66 complaints
66
Total Complaints
ELECTRICAL SYSTEM
Top Issue
3
Crash Reports

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM
22
ENGINE
20
UNKNOWN OR OTHER
7
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
3
POWER TRAIN
3
FUEL/PROPULSION SYSTEM
3
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
1
FORWARD COLLISION AVOIDANCE: WARNINGS
1
ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:SUMP/TANK:DRAIN PLUG
1
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
1

Severity Assessment

3
Crashes
0
Fires
6
Injuries
0
Deaths

Sample Complaint Reports

"On Wednesday, October 6th, I was driving full speed (65mph) on a major highway. Multiple lights on the dashboard came on. The LCD display screen for music, apps, etc. went black. More lights came on and others went off on the dash display. I let off the accelerator and steered the car. The fuel effi..."
"On Wednesday, October 6th, I was driving full speed (65mph) on a major highway. Multiple lights on the dashboard came on. The LCD display screen for music, apps, etc. went black. More lights came on and others went off on the dash display. I let off the accelerator and steered the car. The fuel effi..."
"Very loud car alarms sounded, e.g., it sounded like a something like a red alert in an old Star Trek episode. warning light indicated engine overheated, extreme exhaust/smoke bellowed out from rear of car while decelerating on highway exit ramp. My wife and I were inside the car during this event. ..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28