2020 Kia Optima
Common Problems
Ranked from 52 federal NHTSA complaints. Every problem links to the complaint IDs behind it.
12 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
Engine Excessive Oil Consumption
30complaintsHigh severityEngineThe engine consumes large amounts of oil, leading to frequent oil changes and potential engine damage.
$400–$4,500est. oil-consumption repair (rings/pcv) · 3–14 hrs laborGet local quotes - 2
Engine Knocking and Misfires
22complaintsMedium severityEngineThe engine produces knocking sounds and misfires, often due to faulty components like the knock sensor or cylinder walls.
$200–$900est. ignition service (coils/plugs) · 1–4 hrs laborGet local quotes - 3
Engine Failure into Limp Mode
21complaintsHigh severityEngineThe engine enters limp mode, losing power and accelerating poorly, posing a safety risk during driving.
$4,000–$8,000est. engine replacement · 12–20 hrs laborGet local quotes - 4
Engine Burning Oil
6complaintsHigh severityEngineThe engine burns excessive amounts of oil, leading to frequent oil changes and potential engine failure.
$400–$4,500est. oil-consumption repair (rings/pcv) · 3–14 hrs laborGet local quotes - 5
Knock Sensor Issues
3complaintsMedium severityEngineThe knock sensor malfunctions, leading to engine misfires and check engine light activation.
- 6
Engine Light Flashes and Power Loss
2complaintsMedium severityEngineThe engine light flashes and the car loses power, often occurring at higher speeds.
$150–$1,200est. stalling / shutdown diagnosis + repair · 1–5 hrs laborGet local quotes - 7
Engine Seizure
2complaintsHigh severityEngineThe engine seizes up, leading to potential accidents and engine failure.
$4,000–$8,000est. engine replacement · 12–20 hrs laborGet local quotes - 8
Forward Collision Warning System Failure
2complaintsMedium severityOtherThe forward collision warning system fails to detect approaching vehicles and provide warnings.
- 9
Oil Pressure Light Flashes
2complaintsMedium severityEngineThe oil pressure light flashes intermittently, indicating low oil pressure and potential engine damage.
- 10
Steering Wheel Airbag Deployment Failure
2complaintsSafety riskElectricalThe airbags fail to deploy during a collision, increasing the risk of injury.
- 11
Sunroof Malfunction
2complaintsLow severityOtherThe sunroof malfunctions and breaks unexpectedly, posing no immediate safety risk.
- 12
Transmission Jerkiness and Unresponsiveness
2complaintsMedium severityTransmissionThe 7-speed dual clutch transmission is jerky at low speeds and unpredictable during acceleration.
$200–$2,500est. drivetrain diagnosis + repair · 1–8 hrs laborGet local quotes
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.