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Service bulletins for the 2021 Kia K5

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.

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

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Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
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_TRA111_R22024-11-21. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. TECHNICAL SERVICE BULLETIN: 8-SPEED DUAL CLUTCH TRANSMISSION EOP SENSORLESS 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 to improve the Electric Oil Pump ‘EOP’ operation logic of the automatic transmission ‘A/T’ on some 2021-2023MY Sorento (MQ4a) vehicles produced from September 9, 2020 through December 29, 2023 and 2021-2023MY K5 (DL3a) vehicles produced from March 24, 2020 to December 18, 2023, equipped with a 2.5L T-GDI Theta III engines and 8-Speed Dual Clutch Transmissions (DCT). The affected vehicles may exhibit abnormal/harsh shifting, gear slipping, no gear engagement in Drive ‘D’ and/or Reverse ‘R’ shift selection, accompanied by a Malfunction Indicator Lamp (MIL) ‘ON’ illuminated on the instrument cluster with DTC(s) P1C2D03, P1C2D1C, and/or P1C2E92 stored.
TSB_TRA1132024-10-01. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: PRECAUTIONS FOR TRANSMISSIONS WITH ISG/EOP - This bulletin provides information related to the replacement or servicing of transmission assemblies on all Kia vehicles equipped with Idle-Stop-Go (ISG) and High-Flow Electric Oil Pump (HF EOP). The HF EOP protective connector cover may NOT have been installed on a new or remanufactured transmission during assembly. The HF EOP connector may become contaminated with debris during shipping and/or with oil/coolant during installation.
TSB_TRA111_R12024-08-29. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: 8-SPEED DUAL CLUTCH TRANSMISSION EOP SENSORLESS 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 to improve the Electric Oil Pump ‘EOP’ operation logic of the automatic transmission 'A/T’ on some 2021-2023MY Sorento (MQ4a) vehicles produced from September 9, 2020 through December 29, 2023 and 2021-2023MY K5 (DL3a) vehicles produced from March 24, 2020 to December 18, 2023, equipped with a 2.5L T-GDI Theta III engines and 8-Speed Dual Clutch Transmissions (DCT). The affected vehicles may exhibit abnormal/harsh shifting, gear slipping, no gear engagement in Drive ‘D’ and/or Reverse ‘R’ shift selection, accompanied by a Malfunction Indicator Lamp (MIL) ‘ON’ illuminated on the instrument cluster with DTC(s) P1C2D03, P1C2D1C, and/or P1C2E92 stored.
TSB_TRA1112024-08-01. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. TECHNICAL SERVICE BULLETIN: 8-SPEED DUAL CLUTCH TRANSMISSION EOP SENSORLESS LOGIC IMPROVEMENT - This bulletin provides information to improve the Electric Oil Pump ‘EOP’ operation logic of the automatic transmission ‘A/T’ on some 2021-2023MY Sorento (MQ4a) vehicles produced from September 9, 2020 through December 29, 2023 and 2021-2023MY K5 (DL3a) vehicles produced from March 24, 2020 to December 18, 2023, equipped with a 2.5L T-GDI Theta III engines and 8-Speed Dual Clutch Transmissions (DCT).
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.
TSB_TRA108_R12024-05-06. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: 4WD COUPLING ACTUATOR ASSEMBLY REPLACEMENT - 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 replace the AWD coupling actuator assembly on some 2021-2024MY Kia AWD models listed on page 4. The affected vehicles may exhibit an inoperative AWD system (also referred to as 4WD) capability concern which may be caused by abnormal wear of the motor brushes inside the actuator assembly. This condition will cause the warning lamps on the instrument cluster to illuminate with stored DTC(s) P195800 and/or P19600.
TSB_TRA105_R12024-05-06. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: 4WD COUPLING NOISE INSPECTION AND SNAP RING REPLACEMENT - 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 inspect for a knocking/clicking noise present in the rear of the vehicle during low-speed driving (25MPH or less) on some 2020-2022MY Kia vehicles equipped with All Wheel Drive (AWD). The 4WD coupling snap ring may have excessive play between the drive gear set shaft and coupling flange.
TSB_TRA1052023-12-05. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: 4WD COUPLING NOISE INSPECTION AND SNAP RING REPLACEMENT - This bulletin provides information to inspect for a knocking/clicking noise present in the rear of the vehicle during low-speed driving (25MPH or less) on some 2020-2022MY Kia vehicles equipped with All Wheel Drive (AWD). The 4WD coupling snap ring may have excessive play between the drive gear set shaft and coupling flange.
TSB_TRA1082023-10-01. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: 4WD COUPLING ACTUATOR ASSEMBLY REPLACEMENT - This bulletin provides information to replace the AWD coupling actuator assembly on some 2021-2023MY Kia AWD models listed on page 4. The affected vehicles may exhibit an inoperative AWD system (also referred to as 4WD) capability concern which may be caused by abnormal wear of the motor brushes inside the actuator assembly. This condition will cause the warning lamps on the instrument cluster to illuminate with stored DTC(s) P195800 and/or P19600.
PS7502023-10-01. Service bulletin. POWER TRAIN; STEERING; SUSPENSION. PITSTOP: AWD SYSTEM CONCERN DUE TO TIRE CIRCUMFERENCE - This Pitstop provides information regarding potential concerns with the All-Wheel-Drive (AWD) system due to tire sizes of differing circumference. Some customers may complain of a chatter sensation felt in the drivetrain of the vehicle and/or the failure of drivetrain component(s). A difference in tire size (width, aspect ratio, construction, rim diameter etc.) may be the cause.
PS7422023-04-06. Service bulletin. POWER TRAIN. PITSTOP: PRECAUTIONS FOR WET 8-SPEED DCT: This Pitstop provides information related to the replacement of an 8-Speed Wet Dual Clutch Transmission (WDCT) assembly on some 2021-2023MY K5 (DL3a) and Sorento (MQ4a) vehicles, where the High Flow Electric Oil Pump (HF EOP) protective connector cover may NOT be installed on the new/remanufactured WDCT assembly during production or remanufacturing. The HF EOP connector may become contaminated during shipping and/or may become contaminated with oil and/or coolant during installation.
TSB_TRA101_CLSD2023-04-06. Service bulletin. POWER TRAIN:CLUTCH ASSEMBLY. TSB_TRA101_CLSD: TECHNICAL SERVICE BULLETIN: SERVICE ACTION: 8-SPEED DUAL CLUTCH TRANSMISSION (DCT) S/W LOGIC IMPROVEMENT (SA502) - SA502 superseded by SA526, TSB CLOSED.
TSB_TRA046_R32022-12-06. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - 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, refer to applicable vehicles in the chart starting on page 2.
TSB_TRA101_R12022-09-09. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: 8-SPEED DUAL CLUTCH TRANSMISSION (DCT) S/W LOGIC IMPROVEMENT (SA502) - 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 update the software logic of the A/T system on certain 2021-2023MY K5 (DL3a) and 2021-2022MY Sorento (MQ4a) vehicles equipped with Theta 2.5L T-GDI engine and 8-Speed DCT. The affected vehicles may exhibit an abnormal shifting condition while driving, due to the amount of clutch oil flow consumption immediately after starting. In some cases, the cluster may display a transmission error message and/or MIL ON with DTC P086800 stored.
TSB_TRA1012022-09-01. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: 8-SPEED DUAL CLUTCH TRANSMISSION (DCT) S/W LOGIC IMPROVEMENT (SA502) - This bulletin provides information to update the software logic of the A/T system on certain 2021-2023MY K5 (DL3a) and 2021-2022MY Sorento (MQ4a) vehicles equipped with Theta 2.5L T-GDI engine and 8-Speed DCT. The affected vehicles may exhibit an abnormal shifting condition while driving, due to the amount of clutch oil flow consumption immediately after starting. In some cases, the cluster may display a transmission error message and/or MIL ON with DTC P086800 stored.
TSB_TRA1042022-08-26. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: 8-SPEED WDCT REPLACEMENT INSTRUCTIONS - This bulletin provides information to clear the line pressure information stored in the Transmission Control Module (TCM) prior to replacement of the reman transmission assembly on some 2021MY~ Sorento (MQ4a) and K5 (DL3a) vehicles, equipped with Theta III 2.5 T-GDI engine which may set transmission DTC(s) or have an external/internal leak condition or other concern.
TSB_TRA1002022-02-04. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN:CLUTCH ASSEMBLY; POWER TRAIN. TECHNICAL SERVICE BULLETIN: 8 SPEED WET DUAL CLUTCH TRANSMISSION (WDCT) JUDDER EVALUATION - This bulletin provides information to inspect for judder in the 8-speed Wet Dual Clutch Transmission (WDCT) and possibly replace the Dual Clutch Assembly on some 2021MY~ K5 GT (DL3a) vehicles produced from November 16, 2020 and later and Sorento EX trim and above (MQ4a) non-hybrid vehicles, produced from October 26, 2020 and later, which may exhibit clutch judder. If the vehicle body vibrates without the steering wheel shuddering when performing the creep driving test (driving the vehicle up to 3mph), the vehicle is exhibiting clutch judder. The creep test can be conducted by driving at a speed slower than 5 mph after releasing the brake.

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