Kia service campaign SC373
What it saysVOLUNTARY SERVICE CAMPAIGN: 3-WAY COOLANT VALVE REPLACEMENT (SC373 Revision 1) - This bulletin has been revised to include additional information. NHTSA’s full summary ↓
Kia filed this with NHTSA as a service campaign dated Sep 23, 2026, received Aug 21, 2026, about the visibility/wiper — 6 documents under this number: SC373_TSB_R2, SC373_TSB_R1, SC373_TSB, SC373_QA and 2 more. It names 3 model years (2024–2026). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
Get the next Kia EV6 bulletin by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
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.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SC373_TSB_R2 | Service bulletin | Sep 23, 2026 | 11037607 | PDF, 1,382 KB |
| SC373_TSB_R1 | Service bulletin | Sep 8, 2026 | 11037606 | PDF, 1,375 KB |
| SC373_TSB | Service bulletin | Aug 21, 2026 | 11036626 | PDF, 2,190 KB |
| SC373_QA | Service campaign | Aug 20, 2026 | 11036316 | PDF, 112 KB |
| SC373_DPSM | Service campaign | Aug 20, 2026 | 11036315 | PDF, 84 KB |
| SC373_DP | Service campaign | Aug 20, 2026 | 11036314 | PDF, 108 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Email me new Kia bulletins for the EV6
A weekly email, sent only in a week when Kia files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 3 model years this bulletin names have filed 133 complaints with NHTSA since 2015. 12 of them name Engine — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the visibility/wiper
Source: same model, same component group3 other manufacturer communications filed against the Kia EV6 under the same component group (visibility/wiper), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| PS753 | Service bulletin | Dec 11, 2023 | PITSTOP: AIR CONDITIONER AUTO-DRY WHILE VEHICLE IS OFF - This Pitstop provides information regarding the new feature Air Conditioner Auto-Dr… |
| TSB_CLI054 | Service bulletin | Sep 5, 2023 | TECHNICAL SERVICE BULLETIN: AIR CONDITIONING REFRIGERANT COLLECTION AND RECHARGE (SA538) - This bulletin provides information to evacuate, v… |
| TSB_CLI049_R1 | Service bulletin | Jun 26, 2023 | TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR - ELECTRICAL A/C COMPRESSOR - This bulletin has been revised to include additional information.… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Kia, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Kia SC373 a recall?
No. A service campaign is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the SC373 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does SC373 cover?
The manufacturer filed it against 3 model years: 2026 Kia EV6, 2025 Kia EV6, 2024 Kia EV6. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: 2024-2026MY EV6 (CV, CVa ): built 7 Aug 2023 – 18 Jun 2026; EV6 (CV): built 7 Aug 2023 – 11 Apr 2025 — the build date is on the certification label in the driver’s door jamb.