Service bulletin TSB_TRA115

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	11023285
Published by NHTSA	2025-09-23
Manufacturer's number	TSB_TRA115
Manufacturer's date	2025-09-19
Campaign id or software version	SA630
NHTSA component	POWER TRAIN
Manufacturer's system	TRA

NHTSA's summary

TECHNICAL SERVICE BULLETIN: SERVICE ACTION: 8-SPEED TRANSMISSION GEAR SHIFT LOGIC IMPROVEMENT (SA630) - This bulletin provides information to upgrade the automatic transmission software on certain 2025MY K5 (DL3) vehicles equipped with a Theta III 2.5L GDI produced from February 20, 2024 through April 23, 2025, which may exhibit abnormal roughness or hesitation during gear shifts. Follow the procedure outlined in this publication to upgrade the software logic of the automatic transmission ‘AT’ system to improve shift response during acceleration.

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 K5	2025

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

Other bulletins for the same vehicles and component
SC363_TSB	2026-05-01. Service bulletin. TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: OIL LEVEL PLUG (OLP) INSPECTION, AND OLP GASKET AND/OR ATF FILLER BOLT REPLACEMENT OR A/T REPLACEMENT (SC363) - This bulletin provides information to inspect the oil level plug and automatic transmission fluid (ATF) for signs of leakage and, if necessary, replace the oil level plug gasket and/or ATF filler bolt, or the 8-speed Automatic Transaxle (A/T) assembly on certain 2025-2026 Kia model vehicles listed in the table below. Also, dealers are to ensure the oil level plug is tightened to Kia’s factory specifications upon the completion of the inspection and necessary repair. The oil level plug in the subject vehicles may not have been installed properly during assembly. The oil level plug may be loose or detached from the 8-speed Automatic Transaxle (A/T) which may result in leaking automatic transmission fluid (ATF). A transaxle which is operated with excessively low ATF may become damaged over time.
SC363_QA	2026-05-01. Service campaign. VOLUNTARY SERVICE CAMPAIGN: QUESTION AND ANSWER (SC363) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Voluntary Service Campaign SC363.
SC363_OWNR_DL3	2026-05-01. Service campaign. VOLUNTARY SERVICE CAMPAIGN: OWNER NOTIFICATION (SC363) - This document is the owner notification advising that Kia is conducting a Voluntary Service Campaign on certain 2025-2026 MY K5 vehicles to inspect the oil level plug and automatic transmission fluid (ATF) for signs of leakage and, if necessary, replace the oil level plug gasket and ATF filler bolt and ensure the oil level plug is tightened to Kia’s factory specifications. If necessary, the 8-speed Automatic Transaxle (A/T) may require replacement based on the inspection results.
SC363_DPSM	2026-05-01. Service campaign. VOLUNTARY SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (SC363) - This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Voluntary Service Campaign to inspect the oil level plug and automatic transmission fluid (ATF) for signs of leakage and, if necessary, replace the oil level plug gasket and ATF filler bolt and ensure the oil level plug is tightened to Kia’s factory specifications. Depending on the results of the inspection, the 8-speed Automatic Transaxle (A/T) may require replacement in 12 units of 2025-2026 MY K5 vehicles manufactured from April 7, 2025 through October 1, 2025, 5 units of 2026 MY Sportage vehicles manufactured from June 11, 2025 through August 19, 2025, and 184 units of 2025-2026 MY Carnival vehicles manufactured from February 20, 2025 through September 17, 2025.
SC363_DP	2026-05-01. Service campaign. VOLUNTARY SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO (SC363) - This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Service Campaign to inspect the oil level plug and automatic transmission fluid (ATF) for signs of leakage and, if necessary, replace the oil level plug gasket and ATF filler bolt and ensure the oil level plug is tightened to Kia’s factory specifications. Depending on the results of the inspection, the 8-speed Automatic Transaxle (A/T) may require replacement in 12 units of 2025-2026 MY K5 vehicles manufactured from April 7, 2025 through October 1, 2025, 5 units of 2026 MY Sportage vehicles manufactured from June 11, 2025 through August 19, 2025, and 184 units of 2025-2026 MY Carnival vehicles manufactured from February 20, 2025 through September 17, 2025.
OTA_SA630	2025-10-01. Over-the-air update. RELEASE NOTES: OVER-THE-AIR: SERVICE ACTION: SOFTWARE UPDATE FOR TRANSMISSION CONTROL UNIT (SA630) - This Over-the-Air (OTA) software update is designed to update the Transmission Control Unit of certain 2025 K5 vehicles. This update is designed to improve the performance for smoother gear shifts.
TSB_TRA046_R5	2025-04-23. 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.