Service bulletin TSB_ELE385

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)
Type	Service bulletin
NHTSA id	11021859
Published by NHTSA	2025-08-13
Manufacturer's number	TSB_ELE385
Manufacturer's date	2025-08-07
Campaign id or software version	CA2507
NHTSA component	ELECTRICAL SYSTEM
Manufacturer's system	ELE

NHTSA's summary

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. Due to a communication issue between the key fob and the BDC, the affected vehicles may exhibit a NO START condition when the ignition 'START' button is pressed accompanied by the inability to move the shifter out of the Park (P) position; however, all other Key Fob functions such as the Lock/Unlock, Trunk Release, Alarm and Remote Start continue to operate normally.

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

Electrical system

Vehicles listed
KIA K4	2025

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

Recalls for the same vehicles and component
26V046000	2026-01-26. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

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_ELE414_R1	2026-07-28. Service bulletin. 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 9, 2026. Due to a communication issue between the key fob and the BDC, the affected vehicles may exhibit a NO START condition when the ignition 'START' button is pressed; however, all other key fob functions such as the Lock/Unlock, Trunk Release, Alarm, and Remote Start continue to operate normally.
TSB_ELE422	2026-06-03. Service bulletin. 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 (2021-2026MY All Models).
TSB_ELE417	2026-05-01. Service bulletin. 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.
TSB_ELE414	2026-05-01. Service bulletin. 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. Due to a communication issue between the key fob and the BDC, the affected vehicles may exhibit a NO START condition when the ignition 'START' button is pressed; however, all other key fob functions such as the Lock/Unlock, Trunk Release, Alarm, and Remote Start continue to operate normally.
TSB_ELE413	2026-03-31. Service bulletin. 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. This condition can impact convenience and connectivity features by causing the Remote Start and Remote Climate functions to become inoperative, prevent vehicle status updates in the Kia Access app, and interrupt connected navigation routing services.
OTA_SA621	2025-12-10. Over-the-air update. 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.
OTA_SA620	2025-09-23. Other. 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.
PS791	2025-09-02. Other. 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 with a known good DCU from another vehicle. Doing so may result in inoperative Kia Connect services on either vehicle and may require the replacement of the known good DCU. If a DCU needs to be replaced, the recommendation is to always order a replacement unit (with the correct P/N) to ensure proper Kia Connect services operations using the newly installed/replaced DCU.
TSB_ELE363_CLSD	2025-07-01. Service bulletin. 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. This logic improvement includes a factory mode activation/deactivation to reset the RCM module for sunroof initialization.
TSB_ELE390	2025-07-01. Service bulletin. 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 software includes improved logic to address this issue.