2025 Kia K4 Technical Service Bulletins

19 technical service bulletins (TSBs) are on record for the 2025 Kia K4. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11035251Jul 22, 2026Electrical system. TECHNICAL SERVICE BULLETIN: BODY DOMAIN CONTROLLER (BDC) REPLACEMENT (CA2515 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 regarding the Body Domain Control unit ‘BDC’ on certain 2025MY and 2026MY K4 (CL4) vehicles manufactured from May 1, 2025, through February…
• 11033217May 28, 2026Electrical system. TECHNICAL SERVICE BULLETIN: INFOTAINMENT SYSTEM SOFTWARE UPDATE USING UPDATE.KIA.COM - This bulletin provides information and service procedures for updating the infotainment systems on applicable Kia vehicles using the Kia Navigation Updater available at update.kia.com. The software update may improve system performance, enhance existing features, and apply the latest operating software for supported vehicles…
• 11031905Apr 28, 2026Electrical system. TECHNICAL SERVICE BULLETIN: BODY DOMAIN CONTROLLER (BDC) REPLACEMENT (CA2515) - This bulletin provides information regarding the Body Domain Control unit (“BDC”) on certain 2025MY and 2026MY K4 (CL4) vehicles manufactured from May 1, 2025, through Feb 9, 2026.
• 11031906Apr 14, 2026Electrical system. TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE - This bulletin provides information on the process for downloading infotainment software updates and preparing USB for installation on applicable Kia vehicles. The software downloads and USB preparation process is similar across all supported platforms; however, in‑vehicle installation procedures vary by head unit type.
• 11030344Mar 20, 2026Electrical system. TECHNICAL SERVICE BULLETIN: DCU COMMUNICATION LOGIC IMPROVEMENT - This bulletin provides the procedure to upgrade the Data Connectivity Unit (DCU) system software on some 2025–2026MY vehicles listed in the table below. Kia has identified that Connected Car Services (CCS) functionality may intermittently fail due to temporary DCU communication issues.
• 11026698Dec 9, 2025Back-over prevention (rear camera). PITSTOP: TECHNICAL OPERATIONS: EXTERNAL DAMAGE TO ULTRASONIC SENSOR: This Pitstop provides information related to Parking Distance Warning (PDW) alerts and repairs involving ultrasonic sensors. The PDW system alerts the driver while parking, by calculating distance based on the difference in signal transmission and reception times between the vehicle (ultrasonic sensor) and an object.
• 11026532Dec 2, 2025Engine, Electrical system. RELEASE NOTES: OVER-THE-AIR: SERVICE ACTION SOFTWARE UPDATE FOR WARNING LIGHTS (SA621) - This Over-the-Air (OTA) software update is designed to update the Engine Control Unit (ECU) logic of certain 2025 K4 vehicles. This update improves the processing logic of the Engine Control Unit (ECU) to reduce the unintended display of warning lights.
• 11023283Sep 13, 2025Engine. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: ECM JUDGEMENT LOGIC IMPROVEMENT FOR DTC P218100 (SA621) - This bulletin provides information to upgrade the Engine Control Module (ECM) system software on certain 2025MY K4 (CL4m) vehicles produced from July 03, 2024 through April 28, 2025 equipped with an Nu 2.0L MPI engine. The vehicles affected may exhibit a MIL ‘ON’ with DTC P218100 stored under certain driving…
• 11023288Sep 12, 2025Electrical system. RELEASE NOTES: OVER-THE-AIR: SERVICE ACTION: SOFTWARE UPDATE FOR RCM (SA620) - This Over-the-Air (OTA) software update is designed to update the Roof Control Module (RCM) of certain 2025 K4 vehicles. This update is designed to improve software logic for a smoother sunroof response during one-touch actuation.
• 11022347Aug 22, 2025Electrical system. PITSTOP: TECHNICAL OPERATIONS: DCU IDENTIFICATION AND DAIGNOSTIC AID - This Pitstop provides information on identifying the Data Connectivity Unit (DCU) in Kia vehicles equipped with Connected Car Navigation Cockpit (ccNC) and ccNC Lite head units, as well as a diagnostic aid when diagnosing Kia Connect concerns. When diagnosing non-operational Kia Connect concerns, under no circumstance should the DCU be swapped…
• 11021859Aug 7, 2025Electrical system. TECHNICAL SERVICE BULLETIN: BODY DOMAIN CONTROLLER (BDC) REPLACEMENT (CA2507) - This bulletin provides information regarding the Body Domain Control unit (BDC) on certain 2025MY K4 (CL4) vehicles manufactured from June 1, 2024 through May 1, 2025.
• 11019907Jun 27, 2025Electrical system. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: SUNROOF OPERATION LOGIC IMPROVEMENT (SA620) - This bulletin supersedes TSB SA595 (December 2024) and outlines the procedure to update the Roof Control Module (RCM) software on certain 2025MY K4 (CL4) vehicles produced between September 19, 2024, through May 28, 2025, which may experience inoperative sunroof operation (open/close) due to a software logic error. The updated…
• 11020011Jun 26, 2025Electrical system. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: SUNROOF OPERATION SOFTWARE LOGIC IMPROVEMENT (SA595) - CLOSED AND SUPERSEDED BY ELE390/SA620 - This bulletin provided the procedure to update the Roof Control Module (RCM) software on certain 2025MY K4 (CL4) vehicles produced from September 17, 2024 to November 01, 2024 which may exhibit an inoperable (open/close) sunroof operation due to a software logic error.
• 11019480Jun 5, 2025Exterior lighting. TECHNICAL SERVICE BULLETIN: REAR COMBINATION LAMP BULB REPLACEMENT (CA2506) - This bulletin provides information regarding the replacement of the rear turn signal bulbs and stop lamp bulbs in the rear combination lamps on certain 2025MY K4 (CL4m) vehicles produced from July 5, 2024, to February 15, 2025, and equipped with incandescent bulbs. The bulbs might prematurely become inoperative.
• 11017172Apr 17, 2025Transmission and drivetrain. 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…
• 11015426Mar 6, 2025Electrical system. TECHNICAL SERVICE BULLETIN: COMBINATION TSB/SERVICE ACTION: CCNC – DEALER MODE, FACTORY & NETWORK RESET (SA613) - This bulletin has been revised as a Combination TSB/SA and includes additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area.
• 11014570Feb 26, 2025Visibility (wipers, defrost, mirrors). TECHNICAL SERVICE BULLETIN: SERVICE ACTION: WINDSHIELD WASHER FLUID REPLACEMENT (SA606) - 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 replace the windshield wiper fluid on certain 2025MY K4 (CL4) vehicles produced from January 20, 2025 to January 21, 2025, which may…
• 11014374Feb 20, 2025Visibility (wipers, defrost, mirrors). TECHNICAL SERVICE BULLETIN: SERVICE ACTION: WINDSHIELD WASHER FLUID REPLACEMENT (SA606) - This bulletin provides the procedure to replace the windshield wiper fluid on certain 2025MY K4 (CL4) vehicles produced from January 20, 2025 to January 21, 2025, which may have been contaminated/mixed with engine coolant fluid during assembly. The coolant fluid may form an ‘oily/sticky’ mixture preventing proper cleaning of…
• 11013249Jan 29, 2025Electrical system. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: KIA CONNECT ACTIVATION FAILURE (SA600) - 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.

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