2012 Kia Optima Service and Repair Manual
Kia sold the 2012 Optima with three distinct four-cylinder powertrains, from a turbocharged 2.0L to a full hybrid, and this factory service and repair manual is keyed to that exact split: the procedures are the ones Kia published for your year, engine and trim rather than figures averaged across the range.
Engines covered
- 2.0L inline-four (122 cu in) — DOHC, turbocharged, gasoline
- 2.4L inline-four full hybrid — DOHC, naturally aspirated, gasoline
- 2.4L inline-four — DOHC, naturally aspirated, gasoline
Body styles covered
- 4-door sedan
Trims covered
- EX
- Hybrid
- LX
- SX
Known issues on the 2012 Optima. Four recalls are on federal record for this model year. One covers the engine: the campaign cites machining errors during the engine manufacturing process, and bearing wear may result in the engine seizing, increasing the risk of a crash. A second covers fuel system hoses, lines and fittings on vehicles that previously received an engine replacement under that engine campaign, recall 17V-224, where a fuel leak in the presence of an ignition source can increase the risk of a fire. A third covers the hydraulic service brakes' antilock and traction control system, where an engine compartment fire while parked or driving can increase the risk of injury. The fourth concerns the body roof structure: the right and left headliner plates may not be secured properly, and a plate that detaches during a crash may strike an occupant, increasing their risk of injury. Owners have filed 1,250 complaints for the year and Kia has issued 174 technical service bulletins.
Whether you are evaluating engine bearing noise, inspecting fuel lines after an engine replacement, or servicing the hybrid drive, this manual gives you the procedure Kia wrote for the 2012 Optima, with nothing approximated and nothing carried over from another year.
Kia Motors America (Kia) is recalling certain 2011-2017 Optima, 2012-2017 Sorento and 2011-2018 Sportage vehicles that previously received an engine replacement under recall number 17V-224, warranty, or the Knock Sensor Detection System (KSDS) Product Improvement Campaign. The high pressure fuel pipe that connects to the fuel pump outlet may have been damaged, misaligned or improperly torqued during the engine replacement procedure, possibly causing a fuel leak.
A fuel leak in the presence of an ignition source can increase the risk of a fire.
Kia has notified owners, and dealers will inspect and replace the fuel pipe, as necessary, free of charge. The recall began January 17, 2019. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC172.
Kia Motors America (Kia) is recalling certain 2010-2013 Kia Forte, Forte Koup, 2011-2013 Kia Optima and 2011-2012 Kia Optima Hybrid and Sedona vehicles. In the event of a crash, the air bag control unit (ACU) may short circuit, preventing the frontal air bags and seat belt pretensioners from deploying.
If the frontal air bags and seat belt pretensioners are disabled, there is an increased risk of injury to the vehicle occupants in the event of a vehicle crash that necessitates deployment of these safety systems.
Kia will notify owners. For model year 2011 Sedona vehicles, Kia will instruct dealers to verify the ACU part number and, if necessary, install an extension wire harness kit between the ACU Connector and the Vehicle Harness Connector. For all other affected vehicles, Kia will instruct dealers to install the extension wire harness kit. The recall began September 28, 2018. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC165.
Kia Motor Company (Kia) is recalling certain 2011-2014 Optima, 2012-2014 Sorento and 2011-2013 Sportage vehicles. Machining errors during the engine manufacturing process may cause premature bearing wear within the engine.
Bearing wear may result in the engine seizing, increasing the risk of a crash.
Kia will notify owners, and dealers will inspect the engine assembly, and replace the engine if necessary, free of charge. The recall began June 20, 2017. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC147.
Kia America, Inc. (Kia) is recalling certain 2012-2013 Optima vehicles. The right and left headliner plates may not be secured properly, which can result in the plates detaching in the event of a side curtain air bag deployment.
A plate that detaches during a crash may strike an occupant, increasing their risk of injury.
Dealers will secure the headliner plates, free of charge. Owner notification letters were mailed September 26, 2022. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC245.
Kia America, Inc. (Kia) is recalling certain 2010-2019 Borrego, 2014-2016 Cadenza, 2010-2013 Forte, Forte Koup, Sportage, 2015-2018 K900, 2011-2015 Optima, 2011-2013 Optima Hybrid, Soul, 2012-2017 Rio, 2011-2014 Sorento, and 2010-2011 Rondo vehicles. The Hydraulic Electronic Control Unit (HECU) may experience an electrical short, which can result in an engine compartment fire while parked or driving.
An engine compartment fire while parked or driving can increase the risk of injury.
Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the HECU fuse, free of charge. Interim notification letters, notifying owners of the safety risk, were mailed November 14, 2023. Owner notification letters were mailed March 29, 2024 through June 18, 2024. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC284.
TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: THEFT DETERRENT IGNITION CYLINDER PROTECTOR AND DECAL INSTALLATION (CS2312) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are ind
TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: THEFT DETERRENT IGNITION CYLINDER PROTECTOR AND DECAL INSTALLATION (CS2312) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are ind
CUSTOMER SATISFACTION CAMPAIGN: OWNER NOTIFICATION (CS2312) - This document is the owner notification advising that Kia is conducting Customer Satisfaction Campaign. A software upgrade that addresses the social media theft method has been m
TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: THEFT DETERRENT IGNITION CYLINDER PROTECTOR AND DECAL INSTALLATION (CS2312) - This bulletin provides information to install a Theft Deterrent Ignition Cylinder Protector on certain 2010-202
TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provid
TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. Th
TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. Th
TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: ANTI-THEFT S/W LOGIC UPGRADE & DECAL INSTALLATION (CS2303) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black
Showing the 8 most recent of 241 technical service bulletins on file with NHTSA.
TL* THE CONTACT OWNED A 2012 KIA OPTIMA. WHILE DRIVING APPROXIMATELY 70 MPH, THE VEHICLE SUDDENLY STALLED AND COULD NOT BE RESTARTED. THE VEHICLE WAS TOWED TO THE LOCAL DEALER (SUPERIOR KIA, 260 W. MITCHELL AVE, CINCINNATI, OH) WHERE IT WAS DIAGNOSED THAT THE ENGINE WAS FAULTY. THE ENGINE WAS REPLACED AND THE FAILURE WAS REMEDIED. LATER, WHILE DRIVING APPROXIMATELY 65 MPH, A LOUD BOOMING NOISE WAS HEARD AND SMOKE AND FLAMES WERE PRESENT COMING FROM THE ENGINE COMPARTMENT. THE DRIVER LOST CONTROL
I WAS NOTIFIED BY KIA EARLIER THIS YEAR THAT MY VEHICLE WAS INVOLVED IN A RECALL BECAUSE THE ENGINE COULD SEIZE CAUSING A SAFETY ISSUE. ON 6/12/17 I TOOK MY OPTIMA TO CAMELBACK KIA FOR RECALL WORK AND INSPECTION. ON 8/1/2017 AS I WAS DRIVING NORTHBOUND ON AZ SR51, MY ENGINE STALLED WHILE MOVING ABOUT 40 MPH IN RUSH HOUR TRAFFIC. I THEN PULLED OVER TO RESTART MY VEHICLE, A SHORT TIME LATER I NOTICED SMOKE COMING FROM UNDER THE HOOD. I WAS TOLD BY KIA UPON THEIR INSPECTION THAT THE STARTER IS WHER
10-15 MPH T BONED A CAR THAT RAN A RED LIGHT. AIR BAG DIDN'T GO OFF
BRAKES SQUICK EVEN AFTER REPAIR AND REPLACEMENT AND HAS A SLOWER RESPONSE TIME THEN USUAL AND CAUSED A REAR END ACCIDENT, COOLING AND HEATED SEATS STOPPED WORKING ON THE DRIVER SIDE WHICH I MET OWNERS OF MY EXACT CAR SAID THE SAME THING HAS HAPPENED TO THEM, AND THE PASSENGER SEAT CONTROLLERS DOESN'T WORK TO OPERATE ADJUSTABLE SEATS! THE SUSPENSIONS HAS BEEN BAD EVERY SINCE THE RECALL ON THE ENGINE; FOR SOME REASON IT WAS GIVING BACK TO ME WITH THAT PROBLEM FROM KIA DEALERSHIP. BACK-UP CAMERA IS
TL* THE CONTACT OWNS A 2012 KIA OPTIMA. WHILE DRIVING APPROXIMATELY 5 MPH, THE VEHICLE SUDDENLY ACCELERATED INDEPENDENTLY AND CRASHED INTO THE MEDIAN. THE VEHICLE WAS TOWED TO THE DEALER FOR DIAGNOSTIC TESTING WHERE THE TECHNICIAN ADVISED THAT THE FRONT PASSENGER SIDE TIRE AND AXLE WOULD HAVE TO BE REPLACED. THE FAILURE RECURRED FOUR TIMES. THE FOURTH TIME THE FAILURE RECURRED, THE CONTACT CRASHED INTO ANOTHER VEHICLE. THE CONTACT SUSTAINED INJURIES TO HIS RIGHT KNEE. THE FRONT PASSENGER SUSTAIN
The contact owned a 2012 Kia Optima. The contact stated that the vehicle was previously repaired under NHTSA Campaign Number: 18V363000 (Air Bags) however, it failed to prevent the recall safety risk. The contact stated that while his mother was driving at approximately 45 MPH with the grandmother seated in the front passenger seat, another vehicle cut in front abruptly and switched back into their original lane, causing the contact's mother to crash into the rear of another vehicle ahead. The a
The contact owned a 2012 Kia Optima. The contact stated that, while stopped and attempting to complete a left turn an SUV failed to yield and collided with the front driver side of her vehicle. As a result, the contact lost control of the vehicle, spun across the intersection, and careened off the roadway only coming to a complete stop after colliding head-on with a tree. The contact also stated that the seat belt Emergency Locking Retractor failed to deploy allowing her to jolt forward violentl
TL* THE CONTACT OWNS A 2012 KIA OPTIMA. WHILE DRIVING APPROXIMATELY 40 MPH, THE CONTACT'S VEHICLE CRASHED INTO THE REAR OF A SECOND VEHICLE. THE FRONT END WAS SEVERELY DAMAGED, BUT THE AIR BAGS DID NOT DEPLOY. THE DRIVER SUSTAINED MINOR INJURIES TO THE HEAD AND RIGHT HAND, WHICH DID NOT REQUIRE MEDICAL TREATMENT. A POLICE REPORT WAS FILED. THE FAILURE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER AND LOCAL DEALER WERE NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 60,000.
EXITING HWY 71 EAST BOUND TO WOODWARD DECREASING SPEED THE VEHICLE IN FRONT OF ME HAD A CAR CUT IN FRONT OF HER. I HAD A SAFE DISTANCE AND SLAMMED MY BRAKES. MY BRAKES DID NOT GRAB AS USUAL MY CAR DID NOT STOP AND I HIT THE VEHICLE IN FRONT OF ME. I TRULY BELIEVE MY BRAKE SYSTEM FAILED. I WILL TAKE MY CAR INTO KIA WHEN I GET IT BACK.
TL* THE CONTACT OWNS A 2012 KIA OPTIMA. THE CONTACT STATED THAT WHILE AT A TRAFFIC STOP, THE VEHICLE WAS REAR ENDED AND NONE OF THE AIR BAGS DEPLOYED. THE SEAT BELT DID NOT RETRACT TO LOCK HER IN, WHICH CAUSED HER TO STRIKE HER HEAD ON THE PILLAR NEXT TO THE WINDSHIELD. A POLICE REPORT WAS FILED AND THE CONTACT SUSTAINED BRUISES AND CONTUSIONS. THE VEHICLE WAS NOT TAKEN TO THE DEALER. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILE
WHILE DRIVE ABOVE 45MPH THE CAR WONDERS LEFT AND RIGHT, MAKING IT VERY HARD TO KEEP THE CAR ON THE ROAD. IT ALSO FEELS LIKE THERE IS A CATCH IN THE STEERING MAKING IT VERY EASY TO OVER CORRECT THE CAR. I HAVE HAD IT INTO KIA TO HAVE THE CAR LOOKED AT TWICE NOW. THEY HAVE CHECKED THE ALIGNMENT, TIRE PRESSURE... THEY DROVE A SALESMAN'S CAR AND A CAR OFF THERE LOT AND THEY TELL ME THIS IS THE WAY THEY ALL DRIVE. I FIND THIS VERY HARD TO BELIEVE, (ITS A WORKOUT TO KEEP THE CAR ON THE ROAD). I HAVE B
I WAS INVOLVED IN A LIFE THREATENING ACCIDENT THAT CAUSED MY CAR TO BE TOTALED WHEN THE ENGINE MADE A LOUD KNOCKING NOISE AND THE ENGINE SEIZED WHILE IN MOTION ON A BUSY HIGHWAY AT A SPEED OF 65 MPH WITHOUT ANY SUDDEN WARNING AND MY FAMILY IN THE CAR WE HAD LESS THAN 1 MINUTE TO ESCAPE BEFORE ANOTHER DRIVER SMASHED INTO THE CAR AT 65 MPH. THE CAR STOPPED SO FAST THERE WAS NO TIME TO PULL OVER TO SAFTEY OR A SOULDER
I WAS MERGING BACK ONTO THE FREEWAY AFTER I HAD A PANIC ATTACK DUE TO BEING OVER A BRIDGE WITH ALL THESE CARS AND THE CAR BEHIND ME PROCEEDS TO AGGRESSIVELY TRY TO CUT ME OFF FROM GETTING OVER AND HIT THE BACK OF MY CAR CAUSING DAMAGE.
I WAS DRIVING 60-70 MPH WHEN MY HYBRID SYSTEM ALERTED ME THAT MY BREAKS WERE AN ISSUE. I THEN TRIED TO SLOW AND COULD NOT. THE CAR SLOWED ITSELF AS A SAFTY PROCAUTION BUT I WAS IN 70 MPH TRAFFIC. NOT SAFE. IT WOULD NOT COMPLETELY STOP SO I WAS FORCED WITH THE OPTION OF HITTING A TREE TO MAKE IT STOP. KIA SAYS THAT IT MY BREAKS ELECTRICAL SYSTEM BUT THAT DOESN'T MAKE SINCE. I HAVE MY CAR WORKED ON REPEATEDLY TO AVOID THIS AND NOW LOOK? SOMETHING MALFUNCTIONED THAT SHOULDN'T HAVE.
Vehicle was broken into and stolen…steering wheel column damage, wheel locked, wreck…usb cord used to crank car..police report filed #2209013764ME
Showing the 15 most serious of 919 complaints filed with NHTSA.
