2018 Kia Optima Service and Repair Manual
Kia published one set of specifications for the 2018 Optima, and this factory service and repair manual carries exactly that set — matched to the year, engine and trim on your car, so any torque value or clearance you look up is the figure written for your sedan rather than one carried over from a neighboring model year.
Engines covered
- 2.0L inline-four (122 cu in) — DOHC, turbocharged, gasoline
- 2.0L inline-four full hybrid (122 cu in) — DOHC, naturally aspirated, gasoline
- 2.4L inline-four — DOHC, naturally aspirated, gasoline
- 2.0L inline-four plug-in hybrid (122 cu in) — DOHC, naturally aspirated, gasoline
- 1.6L inline-four (97 cu in) — DOHC, turbocharged, gasoline
Body styles covered
- 4-door sedan
Trims covered
- EX
- EX Pack
- EX Tech
- Hybrid EX
- Hybrid EX Premium
- Hybrid LX
- Hybrid Premium
- LX
- LX 1.6T
- Plug-In Hybrid EX
- Plug-In Hybrid EX Premium
- S
- SX
- SX Turbo
- SXL
- SXL Turbo
Known issues on the 2018 Optima. One recall is on federal record for this model year. It covers the trunk lid latch: the trunk latch base may crack, and a person inside the trunk compartment may become trapped, increasing their risk of injury. Owners have filed 324 complaints for the year and Kia has issued 110 technical service bulletins.
Whether you are replacing a trunk latch, servicing the hybrid or plug-in hybrid drivetrain, or working to a routine maintenance interval, this manual keeps you on the OEM procedure and the correct specification for your specific 2018 Optima.
Kia Motors America (Kia) is recalling certain 2017-2018 Kia Optima hybrid vehicles. These vehicles are equipped with a Voltage Protection Device (VPD), designed to protect the high voltage battery module, that may activate inadvertently.
If the VPD activates while the vehicle is being operated in Electric Vehicle (EV) mode, there may be a loss of power, increasing the risk of a crash.
Kia will notify owners, and dealers will remove the VPD switch and install two newly designed Battery Management Systems (BMS) that contain Overvoltage Protection Devices (OPDs), free of charge. The recall is expected to begin May 2018. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC162.
Kia America, Inc. (Kia) is recalling certain 2016-2017 Rio, 2016-2018 Optima, 2017-2018 Optima Hybrid and Optima Plug-in Hybrid vehicles. The trunk latch base may crack, preventing the opening of the trunk from the inside. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 401, "Internal Trunk Release."
A person inside the trunk compartment may become trapped, increasing their risk of injury.
Dealers will replace the trunk latch base subassembly, free of charge. Owner notification letters were mailed October 19, 2023. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC278.
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
VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS: ECM LOGIC IMPROVEMENT (SC340 REVISION 5) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black b
VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC340 FLIGHT 104 ) - This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign to improve the emissions software logic in the Ele
TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSION SECM LOGIC IMPROVEMENT (SC340 REV 4) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are
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
VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC340 FLIGHT 103 / JF) - This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign to improve the emissions software logic in the
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
Showing the 8 most recent of 155 technical service bulletins on file with NHTSA.
TL* THE CONTACTS DAUGHTER WAS A PASSENGER IN A 2018 KIA OPTIMA. THE CONTACT STATED THAT THE VEHICLE WAS REAR ENDED AND CRASHED INTO A TREE. THE FRONTAL DRIVER AND PASSENGER AIR BAGS DID NOT DEPLOY. THE CONTACT'S DAUGHTER AND THE DRIVER WERE INJURED AND TREATED AT A HOSPITAL. A POLICE REPORT WAS FILED. THE VEHICLE WAS DESTROYED AND TOWED. THE DEALER AND THE MANUFACTURER WERE NOT CONTACTED. THE FAILURE MILEAGE AND VIN WERE UNKNOWN.
ON NOVEMBER 18, 2019 @ 6:38 PM IN PHOENIX, ARIZONA ON 59TH AVE HEADING WEST I WAS IN A VERY TERRIBLE CAR COLLISION WHERE I WAS AT A STAND STILL AT A RED LIGHT AND WAS REAR ENDED BY A TOYOTA TACOMA GOING 45-60 MPH, UPON IMPACT I WAS FORCED FORWARD AND HIT THE BACK OF A FLAT BED TOW TRUCK AND COMPLETELY DESTROYED THE FRONT OF THE VEHICLE. THE AIRBAGS DID NOT DEPLOY UPON IMPACT.
I was rearended, all air bags deployed except steeringwheel
I WAS IN A CAR ACCIDENT AS I WAS DRIVING ON I65 AND MY AIR BAGS DID NOT DEPLOY AND MY SEAT BELT DIDN'T LOCK UP
TAKATA RECALL. I WAS INVOLVED IN AN ACCIDENT WHERE I WAS COMING OFF THE HIGHWAY, SLID ON WATER AND CRASHED INTO A STEEL POLE. THE BREAKS DID NOT WORK AT ALL AND WHEN I GOT OUT TO LOOK AT THE DAMAGE THE BREAK PADS WERE IN THE MIDDLE OF THE STREET LIKE THEY HAD JUST FALL OFF. NONE OF THE AIRBAGS DEPLOYED AND MY FRIEND'S HEAD CRACKED THE WINDSHIELD. CAR WAS TOTALED.
I was run off the road by a drunk driver I hit a tree at 35MPH MY AIR BAGS DID NOT DEPLOY NOR DID MY SEAT BELT LOCK!!!! I NOW HAVE MULTIPLE INJURIES I HAVE BROKEN BONES ALL THROUGHOUT MY FACE!!!!! A SEVERE CONCUSSION!!!!! Any time I call the the customer care center and try and get information or call someone I either get hung up or gave the run around and then hung up on my mother in law has also tried calling and have received the same response this is so unacceptable and unprofessional.
THE CV AXLE ASSEMBLIES SNAP LIKE THE 2016 MODELS DO KIA'S RECALL NUMBER SC139.
I slowly pulled into the parking lot at work coming around a corner with my break song slowly to see if anything was coming from the other side, pull it around to THE back looking straight ahead to pull into my parking spot as I pulled into my parking spot mind you I have had my foot on the break before. I got there and I got into the park spot. I hit the brakes and the brakes went to the floor multiple times and the car just searched straightforward into the brick wall of the building.
Took my vehicle for an oil change next day my vehicle was not working well stopped on me could start didn’t want to do damage so I stopped driving and had it told to a shop found out there is METAL IN THE ENGINE
The contact called on behalf of his son who owned a 2018 Kia Optima. The contact stated that while driving at approximately 25 MPH, the front of the vehicle crashed into the rear end of the vehicle that was in front of him whom made a sudden stop. The contact was concerned that the air bags were not deployed. No warning lights was illuminated. A police report was filed. No medical attention was sought, and no injuries were sustained. The vehicle was pronounced totaled at the scene. The contact a
TL* THE CONTACT OWNS A 2018 KIA OPTIMA. WHILE DRIVING 20 MPH, THE CONTACT WAS NOTIFIED BY OTHER MOTORISTS THAT FLAMES WERE PRESENT UNDER THE VEHICLE. THE VEHICLE WAS PULLED OVER TO THE SIDE OF THE ROAD AND SMOKE APPEARED UNDER THE HOOD. THE CONTACT AND A PEDESTRIAN EXTINGUISHED THE FIRE. THE FIRE AND POLICE DEPARTMENTS WERE AT THE SCENE, BUT THE CONTACT WAS UNSURE IF REPORTS WERE FILED. THERE WERE NO INJURIES. THE VEHICLE WAS TOWED TO NORTHSTAR KIA (46-05 NORTHERN BLVD, LONG ISLAND CITY, NY 1110
I drove the car to the park about 6 miles round trip with family. I came back home and started having lunch for about 25 minutes. I then attempt to start the engine to go to my appointment but then car didn't turn on. On third attempt I had a weird noise coming out of the hood and I went back inside the house to get my gloves. When i came outside of the house, the hood of the car was in flames. I called 911 to turn off the fire. The car is now at a total loss.
Was driving on the interstate. The only light on was the ABS light and the car started smoking. Had to come to a stop as they were sparks coming from out under the car through it into park at around 15 mph steel jumped out of the car and within a minute the car was fully engulfed in flames.
WHILE I WAS DRIVING MY VEHICLE ON THE STREETS; ITS AN 2018 KIA OPTIMA.ON AUGUST 2,2019 MY CAR ENGINE CAUGHT ON FIRE.PEOPLE WALKING ON THE SIDEWALK AND OTHER DRIVERS STOP TO ALERT ME THAT THEY SAW FIRE FROM THE BOTTOM OF THE CAR.THEN WHILE DRIVING I START TO NOTICE EXTREME SMOKE COMING FROM THE HOOD SO MUCH I COULDNT NO LONGER LOOK WHERE I WAS GOING.I PANICKED AND MIND WAS RACING Q HOW COULD THIS HAPPEN I GOT THIS CAR NEW LAST YEAR MAY 1,2018. WHEN I JUMPED OUT TO LOOK AT THE HOOD I SAW MY ENGIN
TL* THE CONTACT OWNS A 2018 KIA OPTIMA HYBRID. THE CONTACT STATED THAT WHILE DRIVING THE VEHICLE STARTED TO MAKE AN UNKNOWN NOISE, THE CONTACT COSTED TO THE SIDE OF THE ROAD AND CHECK UNDERNEATH AND AROUND THE VEHICLE TO SEE WHERE THE NOISE WAS COMING FROM BUT DID NOT FIND ANYTHING. THE CONTACT STATED THAT THE AIR BAG WARNING LIGHT ILLUMINATED. THE VEHICLE STATED THAT SHE WAS ON A WAY TO TAKEN THE VEHICLE FOR AN OIL CHANGE. THE TECHNICIAN HEARD THE NOSE AND INFORMED THE CONTACT THAT HE WAS WOULD
Showing the 15 most serious of 231 complaints filed with NHTSA.
