There are 6 owner-reported fuel system complaints for the 2017 Kia Optimain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Kia fuel rail spurting gas out. Kia dealer said it’s not under warranty and no recalls. Gas leak is so bad car can’t be driven.
Oil burning faster. After an oil change I go about a month before I have to add more oil again. There is no leak as every time I get an oil change I make sure they check. But around the month period I have to check to see if I am low on oil again. Very frustrating and starting to become costly
The contact owns a 2017 Kia Optima. The contact stated that after driving, there was an abnormal fuel odor inside the vehicle. There were no warning lights illuminated. The vehicle was taken to an independent mechanic, who informed the contact that the fuel pump assembly and fuel line needed to be replaced. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 46,000.
The contact owns a 2017 Kia Optima. The contact stated while stationary at a traffic light, while depressing the accelerator pedal, the vehicle hesitated. The check engine warning light was illuminated. The contact was able to continue driving to her residence. The contact took the vehicle to an independent mechanic and was informed that the engine knock sensor needed to be replaced. The contact called the local dealer and made them aware of the failure. The vehicle was not repaired. Upon investigation, the contact associated the failure with NHTSA Campaign Number: 18V907000 (Fuel System, Gasoline, Engine) however, the VIN was not included. The manufacturer had been informed of the failure. The failure mileage was approximately 68,000.
THE CAR STALLS AND HESITATES AT TIMES WHEN THE ACCELERATOR IS PRESSED
THE CAR STALLS AND INTERSECTIONS INTERMITTENTLY. YOU HAVE TO TURN THE KEY OFF AND TURN IT BACK ON SO FAR IT HAS STARTED EVERY TIME.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026