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Service bulletin TSB_TRA105

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10245266
Published by NHTSA2023-12-05
Manufacturer's numberTSB_TRA105
Manufacturer's date2023-11-15
NHTSA componentPOWER TRAIN

NHTSA's summary

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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
KIA K52021, 2022
KIA SORENTO2020, 2021, 2022
KIA SORENTO PHEV2022 (the catalog's model; the bulletin names a series or trim of it)
KIA TELLURIDE2020, 2021, 2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20241872024-03-22. Powertrain
24V2140002024-03-20. POWER TRAIN:DRIVELINE:DRIVESHAFT
20225802022-10-12. Powertrain
22V7600002022-10-11. POWER TRAIN:AUTOMATIC TRANSMISSION

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB_CHA129_R12026-09-30. Service bulletin. TECHNICAL SERVICE BULLETIN: AWD COUPLER NOISE/VIBRATION LOGIC IMPROVEMENT (Revision 1) - 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 4-Wheel Drive ‘4WD’ system software on some 2020-2025MY Telluride (ON) vehicles produced from January 08, 2019 through December 17, 2025. The affected vehicles may exhibit a noise and/or a vibration, shudder, jerking, binding, or chattering sensation while turning at low speeds (10MPH – 15MPH). This concern may be caused by decreased oil friction within AWD coupling due to continuous vehicle operation in harsh conditions (high/low ambient temperatures, extended duration/distance driving).
TSB_CHA128_CLSD2026-05-23. Service bulletin. TECHNICAL SERVICE BULLETIN: 4WD COUPLING NOISE/VIBRATION LOGIC IMPROVEMENT) - CLOSED & SUPERSEDED BY CHA129 - This bulletin is now closed and superseded by CHA129. This bulletin provides information to upgrade the 4-Wheel Drive ‘4WD’ system software on certain 2020-2022MY Telluride (ON) vehicles produced from January 09, 2019 through September 01, 2022. The affected vehicles may exhibit a noise and/or a vibration, shudder, jerking, binding, or chattering while turning at low speeds (10MPH – 15MPH) located from the 4WD coupling caused by a decrease in the oil friction of the 4WD coupling due to continuous vehicle operation in harsh conditions (high/low ambient temperatures, long time/distance traveling).
TSB_CHA1292026-05-23. Service bulletin. TECHNICAL SERVICE BULLETIN: AWD COUPLER NOISE/VIBRATION LOGIC IMPROVEMENT - This bulletin provides information to upgrade the 4-Wheel Drive ‘4WD’ system software on some 2020-2025MY Telluride (ON) vehicles produced from January 08, 2019 through December 17, 2025. The affected vehicles may exhibit a noise and/or a vibration, shudder, jerking, binding, or chattering sensation while turning at low speeds (10MPH – 15MPH). This concern may be caused by decreased oil friction within AWD coupling due to continuous vehicle operation in harsh conditions (high/low ambient temperatures, extended duration / distance driving).
TSB_TRA1122025-09-12. Service bulletin. TECHNICAL SERVICE BULLETIN: TRANSAXLE ASSEMBLY REPLACEMENT & HCU LOGIC IMPROVEMENT - This bulletin provides information to replace the transaxle assembly and upgrade the Hybrid Control Unit Low-Voltage DC Converter (HCULDC) software on some 2022-2024MY Sorento Plug-In Hybrid (MQ4 PHEV) vehicles equipped with a 1.6L T-GDI engine and All-Wheel Drive (AWD), produced from June 29, 2021 through January 10, 2024. Some vehicles may experience an illuminated Malfunction Indicator Lamp (MIL) with DTC P0C4E00 stored, accompanied by a rough transition when the vehicle switches between EV and HEV motive power.
TSB_CHA1282025-05-01. Service bulletin. TECHNICAL SERVICE BULLETIN: 4WD COUPLING NOISE/VIBRATION LOGIC IMPROVEMENT - This bulletin provides information to upgrade the 4-Wheel Drive “4WD” system software on certain 2020-2022MY Telluride (ON) vehicles produced from January 9, 2019, through September 1, 2022. The affected vehicles may exhibit a noise, vibration, shudder, and/or chattering from the 4WD coupling assembly while turning at low speeds (10-15 mph) due to continuous vehicle operation in harsh conditions (e.g., very high or low ambient temperatures).
TSB_TRA046_R52025-04-23. Service bulletin. 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_TRA089_R12025-04-23. Service bulletin. TECHNICAL SERVICE BULLETIN: TCM MIL ON DTC P074100 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 the procedure to improve the logic of the Transmission Control Module (TCM) on some 2020MY Telluride (ON) vehicles, produced from February 6, 2019, through December 9, 2019, which may experience lack of engagement of the torque converter damper clutch with illumination of the MIL and DTC P074100. When this occurs, the vehicle retains motive power, but transmission gear change smoothness can be affected.
TSB_TRA111_R22024-11-21. Service bulletin. 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. 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.
SC303Z_TSB2024-09-03. Service bulletin. TECHNICAL SERVICE BULLETIN: SUBSEQUENT REPAIR ACTION: RIGHT FRONT DRIVESHAFT INSPECTION AND REPLACEMENT (SC303Z) - This bulletin provides information to inspect and, if necessary, replace the right front driveshaft on certain 2020-2024MY Telluride (ON) vehicles manufactured from January 9, 2019 through October 19, 2023 that previously had the campaign SC303 completed.