Service campaign SC373_DPSM

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 campaign
NHTSA id	11036315
Published by NHTSA	2026-08-21
Manufacturer's number	SC373_DPSM
Manufacturer's date	2026-08-20
Campaign id or software version	SC373
NHTSA component	ENGINE; VISIBILITY/WIPER

NHTSA's summary

VOLUNTARY SERVICE CAMPAIGN:DEALER PARTS AND SERVICE MANAGER MEMO (SC373) - This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Voluntary Service Campaign on certain 2024-2026 MY EV6 vehicles, manufactured from August 7, 2023 through June 18, 2026, to replace the 3-way coolant valve assembly with a new one. In addition, dealers will inspect the 3-way coolant valve harness connector for corrosion and, if necessary, replace the harness connector.

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

Engine, Glass, wipers and mirrors, Wipers and washers

Vehicles listed
KIA EV6	2024, 2025, 2026

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
SC373B_OWNR	2026-09-30. Service campaign. VOLUNTARY SERVICE CAMPAIGN: OWNER NOTIFICATION (SC373B) - This document is the owner notification advising that Kia is conducting a Voluntary Service Campaign on certain 2024-2026 MY EV6 vehicles to replace the 3-way coolant valve assembly with a new one. In addition, dealers will inspect the 3-way coolant valve harness connector for corrosion and, if necessary, replace the harness connector.
SC373_TSB_R2	2026-09-30. Service bulletin. TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: 3-WAY COOLANT VALVE REPLACEMENT (SC373 Revision 2) - 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 3-way coolant valve. In addition, inspect the 3-way coolant valve harness connector for corrosion, and if necessary, replace the harness connector on certain 2024-2026MY EV6 (CV, CVa) vehicles produced from August 07, 2023 through June 18, 2026. The 3-way coolant valve in the subject vehicles may become damaged and result in a coolant leak. As a result, corrosion may also be present in the 3-way coolant valve harness connector. An inoperative 3-way coolant valve or corrosion within the harness connector may result in reduced Heating, Ventilation, and Air Conditioning (HVAC) performance and/or in the illumination of the “Check electric vehicle system” or “Refill Coolant” warning messages in the instrument cluster.
SC373_TSB_R1	2026-09-30. Service bulletin. TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: 3-WAY COOLANT VALVE REPLACEMENT (SC373 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 replace the 3-way coolant valve. In addition, inspect the 3-way coolant valve harness connector for corrosion, and if necessary, replace the harness connector on certain 2024-2026MY EV6 (CV, CVa) vehicles produced from August 07, 2023 through June 18, 2026. The 3-way coolant valve in the subject vehicles may become damaged and result in a coolant leak. As a result, corrosion may also be present in the 3-way coolant valve harness connector. An inoperative 3-way coolant valve or corrosion within the harness connector may result in reduced Heating, Ventilation, and Air Conditioning (HVAC) performance and/or in the illumination of the “Check electric vehicle system” or “Refill Coolant” warning messages in the instrument cluster.
TSB_CLI049_R2	2026-09-02. Service bulletin. TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR – ELECTRICAL A/C COMPRESSOR - 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 partial repair of the Air Conditioning (A/C) compressor assembly on some 2011MY~ Optima Hybrid (TF HEV, JF HEV/PHEV), 2015MY~ Soul EV (PS EV), 2017MY~ Niro (DE HEV/PHEV/EV), 2022MY~ EV6 (CV), 2021MY~ Sorento (MQ4 HEV/PHEV), 2023MY~ Sportage (NQ5 HEV/PHEV), and 2023MY~ Niro (SG2 EV/HEV/PHEV) vehicles.
SC373A_OWNR	2026-09-02. Service campaign. VOLUNTARY SERVICE CAMPAIGN: OWNER NOTIFICATION (SC373A) - This document is the owner notification advising that Kia is conducting a Voluntary Service Campaign on certain 2024-2026 MY EV6 vehicles to replace the 3-way coolant valve assembly with a new one. In addition, dealers will inspect the 3-way coolant valve harness connector for corrosion and, if necessary, replace the harness connector.
SC373_TSB	2026-09-02. Service bulletin. TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: 3-WAY COOLANT VALVE REPLACEMENT (SC373) - This bulletin provides information to replace the 3-way coolant valve. In addition, inspect the 3-way coolant valve harness connector for corrosion, and if necessary, replace the harness connector on certain 2024-2026MY EV6 (CV, CVa) vehicles produced from August 07, 2023 through June 18, 2026. The 3-way coolant valve in the subject vehicles may become damaged and result in a coolant leak. As a result, corrosion may also be present in the 3-way coolant valve harness connector. An inoperative 3-way coolant valve or corrosion within the harness connector may result in reduced Heating, Ventilation, and Air Conditioning (HVAC) performance and/or in the illumination of the “Check electric vehicle system” or “Refill Coolant” warning messages in the instrument cluster.
SC373_QA	2026-08-21. Service campaign. VOLUNTARY SERVICE CAMPAIGN: QUESTION AND ANSWER (SC373) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Voluntary Service Campaign SC373.
SC373_DP	2026-08-21. Service campaign. VOLUNTARY SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO (SC373) - This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Service Campaign on certain 2024-2026 MY EV6 vehicles, manufactured from August 7, 2023 through June 18, 2026, to replace the 3-way coolant valve assembly with a new one. In addition, dealers will inspect the 3-way coolant valve harness connector for corrosion and, if necessary, replace the harness connector.