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Service bulletins for the 2020 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.

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

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Only bulletins with type: Service bulletin are shown. Show all

Bulletins, newest first
SC367_TSB2026-09-19. Service bulletin. ELECTRICAL SYSTEM; ENGINE. TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: This bulletin provides information to upgrade the Electronic Control Module ‘ECM’ system software for certain 2019-2020 MY Optima vehicles manufactured from May 21, 2018, through June 1, 2020, equipped with the 1.6L T-GDI engine to ensure compliance with emissions. Kia has become aware that the subject vehicles may have been produced with engine calibrations that can cause the vehicle to release air pollutants that exceed Federal and California standards. These standards were established to protect the public’s health and welfare from the dangers of air pollution.
TSB_CLI049_R22026-09-02. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY/WIPER. TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR – ELECTRICAL A/C COMPRESSOR - 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 Air Conditioning (A/C) compressor assembly on some 2011MY~ Optima Hybrid (TF HEV, JF HEV/PHEV), 2015MY~ Soul EV (PS EV), 2017MY~ Niro (DE HEV/PHEV/EV), 2022MY~ EV6 (CV), 2021MY~ Sorento (MQ4 HEV/PHEV), 2023MY~ Sportage (NQ5 HEV/PHEV), and 2023MY~ Niro (SG2 EV/HEV/PHEV) vehicles.
CS2312_TSB_R22026-06-18. Service bulletin. STRUCTURE:BODY. 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 indicated by a black bar in the margin area. This bulletin provides information to install a Theft Deterrent Ignition Cylinder Protector on certain 2010-2022MY Kia vehicles outlined on page 20, which may not have been equipped with an immobilizer and whose Integrated Body Control Unit (IBU) / Body Control Module (BCM) did receive the Anti-Theft Software Logic upgrade under CS2301/02/03/04/05/06/07/08/09 TSBs. In an effort to help prevent thefts of Kia vehicles, a protective cover will be permanently affixed to the ignition cylinder. This Theft Deterrent Ignition Cylinder Protector prevents the removal of the key lock cylinder thereby preventing access to the ignition tumbler.
TSB_BOD3362026-06-17. Service bulletin. STRUCTURE:BODY. TECHNICAL SERVICE BULLETIN: KEY AND CYLINDER SET REPLACEMENT - This bulletin provides information to replace the driver’s door lock and trunk lid key cylinders on some 2019-2024MY Kia vehicles listed below. On affected vehicles, the stored key code may not correspond to the mechanical key profile, which can result in incorrect key cutting when the original key is lost or damaged.
TSB_CS2312_R12026-02-19. Service bulletin. STRUCTURE:BODY. 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 indicated by a black bar in the margin area. This bulletin provides information to install a Theft Deterrent Ignition Cylinder Protector on certain 2010-2022MY Kia vehicles outlined on page 20, which may not have been equipped with an immobilizer and whole Integrated Body control Unit (IBU) / Body Control Module (BCM) did receive the Ant-Theft Software Logic upgrade under CS2301/02/03/04/05/06/07/08/09 TSBs. In an effort to help prevent thefts of Kia vehicles, a protective cover will be permanently affixed to the ignition cylinder. This Theft Deterrent Ignition Cylinder Protector prevents the removal of the key lock cylinder thereby preventing access to the ignition tumbler.
TSB_CS23122025-12-24. Service bulletin. STRUCTURE:BODY. 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 2010-2022MY Kia vehicles outlined on page 19, which may not have been equipped with an immobilizer and whose Integrated Body Control Unit (IBU) / Body Control Module (BCM) did receive the Anti-Theft Software Logic upgrade under CS2301/02/03/04/05/06/07/08/09 TSBs. In an effort to help prevent thefts of Kia vehicles, a protective cover will be permanently affixed to the ignition cylinder. This Theft Deterrent Ignition Cylinder Protector prevents the removal of the key lock cylinder thereby preventing access to the ignition tumbler.
SC340_TSB_R32025-12-10. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340) - 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 to upgrade the Electronic Control Module ‘ECM’ system software for certain 2016-2022MY vehicles equipped with 2.4L Theta II engines listed in the table below. Kia has become aware that certain 2016-2022MY vehicles equipped with 2.4L Theta II engines may have engine calibrations that were not optimized for emissions standards under certain specific conditions. These calibrations may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect your health and welfare from the dangers of air pollution.
SC340_TSB_R22025-12-02. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340) - 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 to upgrade the Electronic Control Module ‘ECM’ system software for certain 2016-2022MY vehicles equipped with 2.4L Theta II engines listed in the table below. Kia has become aware that certain 2016-2022MY vehicles equipped with 2.4L Theta II engines may have engine calibrations that were not optimized for emissions standards under certain specific conditions. These calibrations may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect your health and welfare from the dangers of air pollution.
SC340_TSB2025-12-02. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340) - This bulletin provides information to upgrade the Electronic Control Module ‘ECM’ system software for certain 2016-2022MY vehicles equipped with 2.4L Theta II engines listed in the table below. Kia has become aware that certain 2016-2022MY vehicles equipped with 2.4L Theta II engines may have engine calibrations that were not optimized for emissions standards under certain specific conditions. These calibrations may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect your health and welfare from the dangers of air pollution.
SC340_TSB_R12025-12-01. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340) - 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 to upgrade the Electronic Control Module ‘ECM’ system software for certain 2016-2022MY vehicles equipped with 2.4L Theta II engines listed in the table below. Kia has become aware that certain 2016-2022MY vehicles equipped with 2.4L Theta II engines may have engine calibrations that were not optimized for emissions standards under certain specific conditions. These calibrations may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect your health and welfare from the dangers of air pollution.
WTY036_TSB_R12025-09-12. Service bulletin. AIR BAGS. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: SIDE AIRBAG (SAB) INSPECTION AND REPLACEMENT FOR DTC(S) B1380/B1384 (WTY036) - 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 associated with the ‘Warranty Extension Program’ (WTY036) to diagnose and repair certain airbag warning light 'ON' conditions on 2019-2020MY Optima (JFa) vehicles produced from May 21, 2018 through June 23, 2020. The affected vehicles may exhibit an airbag warning light 'ON' with DTC B1380 and/or B1384 due to the front seat Side Airbag (SAB) connector experiencing higher than normal resistance. The warranty coverage for repairs related to the front seat SAB due to illumination of airbag warning light has been extended to 15 years / unlimited miles, starting from the date the vehicle was first put into service.
TSB_TRA046_R52025-04-23. Service bulletin. POWER TRAIN. 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 provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, and the transmission oil cooler is transferred to the new transmission.
TSB_ENG222_R82025-04-18. Service bulletin. ENGINE. 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. This bulletin provides information on diagnosing and/or repairing some 2011-2024MY vehicles (refer to the table on pages 9 and 10 for applicable models and engine), which may exhibit a symptom of excessive oil consumption.
TSB_ELE3782025-03-26. Service bulletin. ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: KIA CONNECT MODEM RESET (SA611) - This bulletin outlines the procedure for resetting the modem in certain 2016-2025MY Kia vehicles listed on page 3 that are equipped with Kia Connect Services. The affected vehicles may encounter the following issues: remote Start/Climate Control function not working, vehicle Status on the Kia Access App not updating, connected routing not functioning properly.
TSB_ENG222_R72025-03-04. Service bulletin. ENGINE. 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. This bulletin provides information on diagnosing and/or repairing some 2011-2024MY vehicles (refer to the tables on pages 8-9 for applicable models and engine), which may exhibit a symptom of excessive oil consumption.
PI2108YZ_TSB_R12024-11-14. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: SUBSEQUENT REPAIR ACTION: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2108Y/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 (PI2108) titled “Knock Sensor Detection System - ECU Logic Improvement” for certain 2019-2020MY Optima P/HEV (JF P/HEV) vehicles equipped with Nu 2.0L GDI engine, produced from July 6, 2018 through October 28, 2019. Specifically, this bulletin provides instructions on which procedures to follow if, after installation of the KSDS, any one of the subject vehicles below return to the dealer with Diagnostic Trouble Code (DTC) P1326 (Knock Signal Range/Performance).
TSB_CLI0572024-10-30. Service bulletin. VISIBILITY/WIPER. TECHNICAL SERVICE BULLETIN: HEATING, VENTILATION, AND AIR CONDITIONING (HVAC) BLOWER MOTOR FUSE RELOCATION - This bulletin provides the procedure to relocate the Heating, Ventilation, and Air Conditioning (HVAC) blower motor 40-ampere fuse on some 2016-2020MY Optima (JFa) vehicles produced from August 28, 2015 through June 23, 2020 which may experience an inoperative blower motor due to a blown multi-fuse at position #3. The HVAC system provides cooling and heating to help maintain a comfortable environment inside the vehicle cabin. The blower motor provides primary airflow for the HVAC system. Extended use of the HVAC system at high fan speeds may cause damage to the multi-fuse terminals for the HVAC blower motor circuit, which can cause the blower motor to become inoperative, resulting in reduced heat and air conditioning.
CS2303_TSB_R42024-06-13. Service bulletin. ELECTRICAL SYSTEM. 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 bar in the margin area. This bulletin provides the procedure to upgrade the software logic of the Integrated Body Control Unit (IBU) or Body Control Module (BCM) system on certain 2011-2015MY Optima (TF), 2012-2015MY Optima (QF) and 2016-2020MY Optima (JF, JFa) vehicles produced within the dates outlined on page 10, which may not be equipped with an immobilizer. This logic upgrade will add anti-theft ignition start logic to the vehicle's system operation which activates when the vehicle is locked with the use of the key fob.
TSB_TRA046_R42024-06-04. Service bulletin. POWER TRAIN. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced.
PI2108_OWNR_2012024-05-06. Service bulletin. ENGINE AND ENGINE COOLING. PRODUCT IMPROVEMENT CAMPAIGN: OWNER RENOTIFICATION (PI2108) - This document is the owner renotification advising that Kia is conducting a Product Improvement Campaign to perform a software update on 2019-2020 MY Kia Optima Hybrid (HEV) and Plug-In Hybrid (PHEV) vehicles 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").
WTY036_TSB2024-04-03. Service bulletin. AIR BAGS. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION: SIDE AIRBAG (SAB) INSPECTION ANDREPLACEMENT FOR DTC(S) B1380/B1384 (WTY036) - This bulletin provides information associated with the 'Warranty Extension Program' (WTY036) to diagnose and repair certain airbag warning light 'ON' conditions on 2019-2020MY Optima (JFa) vehicles produced from May 21, 2018 through June 23, 2020. The affected vehicles may exhibit an airbag warning light 'ON' with DTC B1380 and/or B1384 due to the front seat Side Airbag (SAB) connector experiencing higher than normal resistance. The warranty coverage for repairs related to the front seat SAB due to illumination of airbag warning light has been extended to 15 years/unlimited miles, starting from the date the vehicle was first put into service.
WTY036_TSB2024-04-02. Service bulletin. AIR BAGS. TECHNICAL SERVICE BULLETIN: SIDE AIRBAG (SAB) INSPECTION AND REPLACEMENT FOR DTC(S) B1380/B1384 (WTY036) - This bulletin provides information associated with the 'Warranty Extension Program' (WTY036) to diagnose and repair certain airbag warning light 'ON' conditions on 2019-2020MY Optima (JFa) vehicles produced from May 21, 2018 through June 23, 2020. The affected vehicles may exhibit an airbag warning light 'ON' with DTC B1380 and/or B1384 due to the front seat Side Airbag (SAB) connector experiencing higher than normal resistance. The warranty coverage for repairs related to the front seat SAB due to illumination of the airbag warning light has been extended to 15 years / unlimited miles, starting from the date the vehicle was first put into service.
WTY036_REIMB2024-03-02. Service bulletin. AIR BAGS. WARRANTY EXTENSION: REIMBURSEMENT FORM (WTY036) - This document is a Reimbursement Request form that was mailed with the customer letter advising them to submit the form if they had paid for repairs for this same matter prior to the warranty extension program launch.
WTY036_QA2024-03-02. Service bulletin. AIR BAGS. WARRANTY EXTENSION: QUESTION AND ANSWER (WTY036) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Warranty Extension Campaign WTY036.
WTY036_OWNR2024-03-02. Service bulletin. AIR BAGS. WARRANTY EXTENSION: OWNER NOTIFICATION (WTY036) - This document is the owner notification advising that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for repairs related to the illumination of the Airbag Warning Light in 2019-2020 MY Optima vehicles from 5 years / 60,000 miles to 15 years / unlimited miles, whichever comes first, starting from the date the vehicle was first put into service. This warranty extension is to address the Airbag Warning Light ON condition.

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