I WAS DRIVING ON THE INTERSTATE. HAD BEEN DRIVING FOR ABOUT 40 MINUTES WHEN I WAS ON THE INTERSTATE GOING UP A SMALL HILL AND TRIED TO ACCELERATE IN SPEED AND MY CHECK ENGINE LIGHT CAME ON AND MY CAR STARTED JUMPING AND THEN WOULD NOT KEEP THE SPEED I WAS AT. THE SPEED IN MY CAR KEPT DESCENDING. IT WASNT UNTIL I WAS GOING 30 MPH BEFORE I COULD GET OVER INTO THE SLOW LANE TO THEN GET IN THE EMERGEN…
2012 kia Optima engine problems
severe 295 complaints filed with NHTSA · avg repair $3,100
Complaints
295
Recalls
0
Crashes
3
Avg fix
$3,100
What owners are reporting 6 most recent
TL* THE CONTACT OWNS A 2012 KIA OPTIMA. WHILE DRIVING 15 MPH, THE VEHICLE SEZED WITHOUT WARNING. WHEN THE CONTACT PULLED OVER TO THE SHOULDER OF THE ROAD, TURNED OFF, AND RESTARTED THE VEHICLE, IT FAILED TO RETURN TO NORMAL. THE VEHICLE WAS TOWED TO A FAMILY MEMBER'S HOUSE. THE CONTACT REFERENCED NHTSA CAMPAIGN NUMBER: 17V224000 (ENGINE AND ENGINE COOLING). THE MANUFACTURER WAS NOTIFIED. THE DEALE…
AS MY STEPDAUGHTER WAS DRIVING HOME FROM WORK ON A HIGHWAY, A LOUD KNOCK NOISE CAME FROM THE ENGINE COMPARTMENT. AT WHICH TIME SHE WAS SCARED TO DRIVE IT ANYMORE, SO SHE PARKED ALONGSIDE ROAD AND WAITED FOR SOMEONE TO COME GET HER. THE CAR WAS THEN TRAILERED TO THE HOUSE AND THEN TO THE KIA DEALERSHIP. WHEN THE CAR WAS STARTED TO LOAD ONTO THE TRAILER, THERE WERE NO WARNING LIGHTS OF ANY KIND O…
My engine has blown. No check engine light warning was given. Now the dealer says they will not replace the engine and it will cost me 10,000 for the repair.
The contact owns a 2012 Kia Optima. The contact stated while driving approximately 70 MPH, the check engine warning illuminated, and the vehicle lost motive power. The contact stated that the engine was running however, the vehicle failed to respond as needed. The contact pulled off the highway into a rest area. The contact stated that the engine and the vehicle were shaking abnormally. The contac…
ENGINE IS MAKING KNOCKING SOUND
Common questions
How serious is the engine problem on the 2012 kia Optima?
It's a meaningful issue. 295 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
Some links on this page are affiliate links.