WenmarOpen by Wenmar Pro

Service bulletins for the 2015 Kia Optima

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

268 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
SC208_DP2021-08-25. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. SC208_DP: DEALER PRINCIPAL MEMO - This document is the announcement to the dealer principals that Kia America, Inc. is conducting a Voluntary Emissions Service Campaign to install an Auxiliary Canister Kit to improve evaporative system performance on certain 2011-2016 MY Kia Optima Hybrid vehicles manufactured from February 15, 2011 through July 22, 2015.
PI2104_TSB2021-08-02. Service bulletin. ENGINE AND ENGINE COOLING. PRODUCT IMPROVEMENT CAMPAIGN: THETA 2.4L MPI - KNOCK SENSOR DETECTION SYSTEM (KSDS) ECU LOGIC IMPROVEMENT (PI2104) - This bulletin provides information related to a software update to the Engine Control Unit (ECU) to install the Knock Sensor Detection System (KSDS), in order to protect the engine from excessive connecting rod bearing damage. This update is for certain 2014-2016MY Optima Hybrid (TF HEV) vehicles equipped with Theta 2.4L MPI engines, produced from December 11, 2013 through July 22, 2015.
PI2104_OWNR2021-08-02. Service bulletin. ENGINE AND ENGINE COOLING. PRODUCT IMPROVEMENT CAMPAIGN: OWNER NOTIFICATION - This document is the owner notification advising that Kia is conducting a Product Improvement Campaign to perform a software update on 2014-2016 MY Optima Hybrid vehicles equipped with 2.4-liter MPI engines to protect the engine from excessive connecting rod bearing damage. The update will be done free of charge and will only involve the addition of newly developed computer software for the Engine Control Unit ("ECU").
PI2104_QA2021-08-02. Service bulletin. ENGINE AND ENGINE COOLING. PRODUCT IMPROVEMENT CAMPAIGN: QUESTION AND ANSWER - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Product Improvement Campaign (PI2104).
PI2104_DPSM2021-08-02. Service bulletin. ENGINE AND ENGINE COOLING. PRODUCT IMPROVEMENT CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO - This document is the announcement to the dealer principals that Kia is conducting a Product Improvement Campaign to perform a software update to the Engine Control Unit (ECU) to protect the engine from excessive connecting rod bearing damage on 2014-2016 MY Kia Optima Hybrid vehicles equipped with 2.4-liter MPI engines, manufactured from December 11, 2013 through July 22, 2015.
PI2104_DP2021-08-02. Service bulletin. ENGINE AND ENGINE COOLING. PRODUCT IMPROVEMENT CAMPAIGN: DEALER PRINCIPAL MEMO - This document is the announcement to the dealer principals that Kia is conducting a Product Improvement Campaign to perform a software update to the Engine Control Unit (ECU) to protect the engine from excessive connecting rod bearing damage on 2014-2016 MY Kia Optima Hybrid vehicles equipped with 2.4-liter MPI engines, manufactured from December 11, 2013 through July 22, 2015.
TSB_ENG222_R22021-03-24. Service bulletin. ENGINE AND ENGINE COOLING. TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA 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. This bulletin provides information on diagnosing and/or repairing some 2011-2019MY vehicles (refer to table below for applicable model and engine), which may exhibit a symptom of excessive oil consumption.
PS6862021-03-04. Service bulletin. ENGINE AND ENGINE COOLING. PITSTOP/TECHNICAL OPERATIONS - SMOKE MACHINE NOT TO BE USED FOR EMISSIONS TESTING WITH HEV/PHEV MODELS - This Pitstop provides information to properly test the evaporative emissions system in all Kia 2011MY~ Hybrid (HEV) and Plug-In Hybrid (PHEV) model vehicles. A smoke machine should NEVER be used when testing the evaporative system in a HEV/PHEV model vehicle.
TSB_ENG222_R12021-02-02. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA 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. This bulletin provides information on diagnosing and/or repairing some 2011-2019MY vehicles (refer to table below for applicable model and engine), which may exhibit a symptom of excessive oil consumption.
TSB_CHA084_R62020-12-02. Service bulletin. ENGINE AND ENGINE COOLING; STEERING; ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR OF C-MDPS MOTOR, ECU, WORM GEAR AND/OR STEERING COLUMN HOUSING - 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 provides information regarding the partial repair of the Motor Driven Power Steering (MDPS) Motor, Electronic Control Unit (ECU), Worm Gear Assembly or Steering Column Housing on some 2010MY~ Kia models listed on page 8, equipped with a Column Motor Driven Power Steering (C-MDPS) unit.
TSB_CHA084_R52020-12-02. Service bulletin. STEERING; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR OF C-MDPS MOTOR, ECU, WORM GEAR AND/OR STEERING COLUMN HOUSING - 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 provides information regarding the partial repair of the Motor Driven Power Steering (MDPS) Motor, Electronic Control Unit (ECU), Worm Gear Assembly or Steering Column Housing on some 2010MY~ Kia models listed on page 8, equipped with a Column Motor Driven Power Steering (C-MDPS) unit.
PI1802YZ_TSB_R42020-12-01. Service bulletin. ENGINE AND ENGINE COOLING. PRODUCT IMPROVEMENT CAMPAIGN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802Y/Z) - 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 provides information related to the Technical Service Bulletin previously published in July 2018 (PI1802 Rev 10, 03/16/2020) titled “Knock Sensor Detection System - ECU Logic Improvement” equipped w/THETA II engine. Specifically, this bulletin provides instructions on which procedures to follow if, after installation of the KSDS, any one of the subject vehicles below returns to the dealer with Diagnostic Trouble Code (DTC) P1326 (Knock Signal Range/Performance).
PI1802_TSB_R122020-09-03. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. PRODUCT IMPROVEMENT - TSB_PI1802_R2 - Knock Sensor Detection System - ECU Logic Improvement - 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 provides information related to a software update to the Engine Control Unit (ECU) to install the Knock Sensor Detection System (KSDS) in order to protect the engine from excessive connecting rod bearing damage.
SC189_TSB2020-08-05. Service bulletin. ENGINE AND ENGINE COOLING. TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN - AUXILIARY CANISTER INSTALLATION AND EVAP LEAKAGE TEST (SC189) - This bulletin provides information on the installation of an auxiliary EVAP canister on some 2011-2015MY Optima (TF) vehicles equipped with Theta 2.4L GDI engines, produced from August 12, 2010 through July 23, 2015. This is to improve evaporative system performance and ensure compliance with Federal and California emission regulation standards.
TSB_ENG2192020-08-04. Service bulletin. ENGINE AND ENGINE COOLING. TECHNICAL SERVICE BULLETIN: MAINTENANCE REMINDER FEATURE - This bulletin provides information on setting the "Service Interval Reminder" feature available on most Kia vehicles. If the service interval reminder is set, the customer will be informed to have the next maintenance service performed, which can positively affect vehicle longevity and performance.
SC189_QA2020-08-04. Service bulletin. ENGINE AND ENGINE COOLING. Voluntary Emissions Service Campaign (SC189) - Questions and Answers
SC189_POC2020-08-04. Service bulletin. ENGINE AND ENGINE COOLING. Voluntary Emissions Service Campaign (SC189) - Proof of Completion Card
SC189_OWNR2020-08-04. Service bulletin. ENGINE AND ENGINE COOLING. Voluntary Emissions Service Campaign (SC189) - Owner Notification Letter - Dear Kia Optima Owner: Kia Motors America, Inc. is conducting a Voluntary Emissions Service Campaign to install an auxiliary evaporative canister in your vehicle to ensure the evaporative canister is not releasing excessive pollutants into the air.
SC189_Label2020-08-04. Service bulletin. EQUIPMENT:OTHER:LABELS; ENGINE AND ENGINE COOLING. Voluntary Emissions Service Campaign (SC189) - Completion Label
SC189_DPSM2020-08-04. Service bulletin. ENGINE AND ENGINE COOLING. Voluntary Emissions Service Campaign (SC189) - Dealer Parts and Service Manager Memo - Kia Motors America, Inc. is conducting a Voluntary Emissions Service Campaign to install an Auxiliary Canister Kit to improve evaporative system performance on certain 2011-2015 MY Kia Optima vehicles equipped with the 2.4-liter engine manufactured from August 12, 2010 through July 23, 2015. Kia has become aware of some 2011-2015 Optima vehicles that may have been produced with evaporative canisters that can cause the vehicle to release air pollutants, which exceed Federal and California emissions standards.
SC189_DP2020-08-04. Service bulletin. ENGINE AND ENGINE COOLING. Voluntary Emissions Service Campaign (SC189) - Dealer Principal Memo - Kia Motors America, Inc. is conducting a Voluntary Emissions Service Campaign to install an Auxiliary Canister Kit to improve evaporative system performance on certain 2011-2015 MY Kia Optima vehicles equipped with the 2.4-liter engine manufactured from August 12, 2010 through July 23, 2015. Kia has become aware of some 2011-2015 MY Optima vehicles that may have been produced with evaporative canisters that can cause the vehicle to release air pollutants that exceed Federal and California emissions standards.
PI1802YZ_TSB_R32020-08-03. Service bulletin. ENGINE AND ENGINE COOLING. PRODUCT IMPROVEMENT CAMPAIGN - ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802Y/Z_Rev3) - This bulletin has been revised to include additional information. - This bulletin provides information related to the Technical Service Bulletin previously published in July 2018 (PI1802 Rev 10, 03/16/2020) titled "Knock Sensor Detection System - ECU Logic Improvement".
PI1802YZ_TSB_R22020-08-03. Service bulletin. ENGINE AND ENGINE COOLING. PRODUCT IMPROVEMENT CAMPAIGN - ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802Y/Z_Rev2) - This bulletin has been revised to include additional information. This bulletin provides information related to the Technical Service Bulletin previously published in July 2018 (PI1802 Rev 10, 03/16/2020) titled "Knock Sensor Detection System - ECU Logic Improvement".
PI1802_TSB_R112020-07-06. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. TSB: PRODUCT IMPROVEMENT CAMPAIGN : KNOCK SENSOR DETECTION SYSTEM (KSDS) LOGIC IMPROVEMENT (PI1802_R11) - This bulletin has been revised to include additional information. This bulletin provides information related to a software update to the Engine Control Unit (ECU) to install the Knock Sensor Detection System (KSDS) in order to protect the engine from excessive connecting rod bearing damage.
TSB_ENG205_C2020-05-05. Service bulletin. ENGINE AND ENGINE COOLING. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: WIRING SIGNAL INTERFERENCE CHECK & ENGINE NOISE INSPECTION (SA379) - CLOSED - SUPERSEDED BY PI1802YZ/1803YZ.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.