2020 Hyundai Sonata
Common Problems
Ranked from 63 federal NHTSA complaints and 3 recalls. Every problem links to the complaint IDs behind it.
13 Common Problems
Ordered by how often owners reported each one to NHTSA. The bar shows how common a problem is relative to the most-reported on this vehicle. Expand any problem to see the federal complaint IDs.
- 1
Fuel Tank Expansion and Rear Seat Lifting
22complaintsHigh severityFuel systemThe fuel tank expands, causing the rear seats to lift and potentially leading to a loss of vehicle stability.
$300–$1,200est. fuel line/tank repair · 2–6 hrs laborGet local quotesRelated recall: 25V796000
- 2
Severe Fuel System Issues Leading to Vehicle Damage
14complaintsHigh severityFuel systemSevere fuel system issues cause the fuel tank to expand, leading to significant damage to the vehicle structure and potential fire risk.
Related recall: 25V796000
- 3
Engine Stall During Operation
8complaintsMedium severityEngineThe engine stutters and stalls during operation, often without warning, affecting vehicle reliability.
$150–$1,200est. stalling / shutdown diagnosis + repair · 1–5 hrs laborGet local quotes - 4
Passenger Airbag Malfunction
7complaintsSafety riskElectricalThe passenger airbag does not deploy if a cushion or heavy coat is used.
Related recall: 20V213000
- 5
HVAC Blower Failure
6complaintsMedium severityElectricalThe HVAC blower motor fails intermittently, causing inconsistent air conditioning performance.
$150–$1,100est. hvac diagnosis + repair · 1–5 hrs laborGet local quotesRelated recall: 20V213000
- 6
Unexplained Deceleration During Driving
4complaintsMedium severityTransmissionThe car suddenly decelerates to a lower speed without warning during driving.
- 7
Water Intrusion in Doors
3complaintsLow severityOtherWater enters the doors during rain, especially the rear doors, causing water to drain out when opened.
Related recall: 20V122000
- 8
Back Over Prevention Camera Failure
2complaintsLow severityOtherThe back over prevention camera malfunctions, displaying black screens or no images, reducing driver visibility.
Related recall: 20V122000
- 9
Doors Opening Without Unlocking
2complaintsMedium severityOtherThe doors open independently without pressing the unlock button, causing safety concerns.
Related recall: 20V122000
- 10
Engine Stall at Idle Due to Stop-Start System Failure
2complaintsLow severityEngineThe engine stalls at idle when the stop-start system malfunctions.
$150–$900est. stop-start system diagnosis · 1–4 hrs laborGet local quotes - 11
Forward Collision Avoidance System Interference
2complaintsMedium severityOtherThe forward collision avoidance system engages unexpectedly with other vehicles, leading to unintended braking.
Related recall: 20V122000
- 12
Sudden Deceleration and Dashboard Warning Lights
2complaintsSafety riskTransmissionThe car suddenly decelerates to about 10 mph without warning, activating multiple dashboard warning lights, posing a safety risk.
$100–$250est. professional diagnosis · 1–2 hrs laborGet local quotes - 13
Sunroof Malfunction Leading to Shattering
2complaintsHigh severityOtherThe sunroof shatters unexpectedly, posing a risk of injury from flying glass.
Related recall: 20V122000
Other years & sources
Data source: U.S. National Highway Traffic Safety Administration (NHTSA) owner complaints and recalls. Problems are clustered and ranked from the complaint record; occurrence counts reflect corroborating complaints, not total incidence. Vehicle image is illustrative. Repair-cost figures are typical U.S. independent-shop ranges (parts + labor) for the class of repair shown — actual quotes vary by region, engine, and diagnosis; always confirm with a local shop.