Kia service campaign SC321
Kia filed this with NHTSA as a service campaign dated Aug 21, 2025, received Sep 18, 2024, about the service brakes — 7 documents under this number: SC321_OWNR_201, SC321_TSB_R1, SC321_OWNR, SC321_TSB and more. It names 4 model years (2019–2022). 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationTECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: IEB INSPECTION AND WATER PROOFING OR IEB REPLACEMENT (SC321) - 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 inspect the Integrated Electronic Booster (IEB) on certain 2019-2022MY Niro EV (DE EV) vehicles produced from December 5, 2018 through April 12, 2022, that were originally sold or are currently registered in one of the 28 states where heavy amounts of road salt are used. Over time, saltwater inflow into the Integrated IEB at the IEB fastening bolt hole may cause corrosion and lead to an inoperable IEB motor. Should this occur, the vehicle may experience illumination of the Anti-lock Brake System (ABS), Forward Collision-Avoidance Assist (FCA) warning lights, and/or a firmer brake pedal feel. The brakes remain operational. Kia is conducting this service campaign to improve corrosion resistance of the IEB assembly.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SC321_OWNR_201 | Service campaign | Aug 21, 2025 | 11022350 | not yet checked |
| SC321_TSB_R1 | Service campaign | Sep 27, 2024 | 11008143 | not yet checked |
| SC321_OWNR | Service campaign | Sep 20, 2024 | 11007894 | not yet checked |
| SC321_TSB | Service bulletin | Sep 18, 2024 | 11008033 | not yet checked |
| SC321_QA | Service campaign | Sep 18, 2024 | 11007895 | not yet checked |
| SC321_DPSM | Service campaign | Sep 18, 2024 | 11007890 | not yet checked |
| SC321_DP | Service campaign | Sep 18, 2024 | 11007883 | not yet checked |
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.
Common questions
Source: NHTSA, 49 CFR 579.5Is Kia SC321 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 SC321 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 SC321 cover?
The manufacturer filed it against 4 model years: 2022 Kia Niro, 2021 Kia Niro, 2020 Kia Niro, 2019 Kia Niro. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.