Problems · by component
2012 Kia Optima fuel/propulsion system problems
42 owner complaints to NHTSA about the 2012 Kia Optima cite fuel/propulsion system, 5% of all 920 complaints for this model year.
Complaints
42
5% of all complaints
Crashes
0
Reported by owners
Fires
3
Reported by owners
Injuries
0
Reported by owners
What owners say about the fuel/propulsion system
Verbatim from NHTSA complaints, newest first
“Car simply started for me after work this past Thursday @4 pm I dove down the street and for about 5 mins and had to turn around due to me leaving something at work. When I arrived back at work I parked and cut my car off as I normally do and when I returned to start it back up it never did. I have previously been having to add 5 quarts of oil frequently at least once or twice a month for the past 7 months since last year. Was told my car had an oil consumption problem by a previous mechanical shop last year. Noticed that these cars have recalls on them and that my car and year do fit the requirements. I do owned my car with the Title in hand. It’s NOT a salvaged title. I have a service appointment on the 24th of June next Tuesday at Kia of Gastonia located in Gastonia, NC. I have to get my car towed to this establishment on Monday or the morning of my appointment. I’m asking that this situation can be properly investigated and properly and honestly handled under KIA policy. My name is [XXX] my # is [XXX] thanks”
“I was driving home at night around 8pm. I was merging into the slow lane and my car completely lost power. A semi truck was right behind me. Luckily I was able to get over to the emergency lane safely. My car had no acceleration at all or any control of the steering. Prior to this incident there was no problem or warnings of any lights on dash or car having problems. It’s a daily driver for me to work. It’s never gave me any problems prior to this. I’ve had the routine maintenance done on along with the recommended mileage maintenance done. It’s been over a month now and my car still won’t start I haven’t had time to get it towed to a dealer ship or repair shop because I work 17 hour days. Everything I’ve researched about my make and model is starting to indicate that the engine seized up. I really hope that’s now the case because my car will be paid off in 3months. It has 165k miles on it I need help on weather the engine is part of a recall.”
“Car was involved in the class action suite for the motor replacement and had the motor replaced at 156,763 miles on the car. Since the replacement the high pressure fuel pump has had to be replaced twice and is not needing replacement again with only 218,000 miles (62000 miles since replacement). There where no previous issues with the HPFP before motor replacement and KIA will not do anything about the HPFP continuous failure. This appears to be a very common issue with the KIA products and yet no recall has been issued. This is ultimately a safety issue as the vehicle can cut off while in motion causing a risk for collision but has not been addressed by anyone other than a Repair bulleting put out by KIA in 2013 to all their dealerships for this issue so KIA is aware of the issues with the failures. This needs to be addressed before someone is injured or killed due to this re-occurring malfunction part.”
“.I recently have actually found out about the recall concerning my engine. Manufacture SC148. NHTSA recall 17V224m I called a dealership. When I asked them about the recalls this one was not mentioned. I wanted to ensure I was reading that properly. Can you explain what that means as far as the engine”
“Engine light keeps flashing and car stalls and will not go over 45 mph. One incident happened on a busy highway as merged on and was almost hit by a tractor trailer from behind.”
“My vehicle has been smelling like fuel inside of the vehicle and cannot take it to a kia dealership due to them being backed up. There are no visible leaks inside or outside of the vehicle but it is unsafe to inhale fuel and every time i fill it up, the smell gets stronger.”
Showing 6 of 42 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 28, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.