Kia service campaign SC323
What it saysVOLUNTARY SERVICE CAMPAIGN: VCMC LOGIC IMPROVEMENT (SC323) - This bulletin provides information to improve the software logic in the Vehicle Charging Management System (VCMS) on certain 2023-2024MY Niro EV (SG2 EV)… NHTSA’s full summary ↓
Kia filed this with NHTSA as a service campaign dated Oct 31, 2024, received Oct 30, 2024, about the fuel/propulsion system — 5 documents under this number: SC323_OWNR, SC323_TSB, SC323_QA, SC323_DPSM and 1 more. It names 2 model years (2023–2024). 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 Niro 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 communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
What 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: VCMC LOGIC IMPROVEMENT (SC323) - This bulletin provides information to improve the software logic in the Vehicle Charging Management System (VCMS) on certain 2023-2024MY Niro EV (SG2 EV) vehicles produced from July 11, 2022 through February 23, 2024. While charging using a 240-V AC (“Level 2”) charger, the subject vehicles may experience an interrupted charging session or a lower charging speed due to a degraded electrical connection from exposure to a damaged charging cable connector. Dealers are to update the ‘VCMS’ ECU with improved software to improve charging speeds and reduce interrupted charging sessions.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SC323_OWNR | Service campaign | Oct 31, 2024 | 11009488 | PDF, 107 KB |
| SC323_TSB | Service campaign | Oct 29, 2024 | 11009490 | PDF, 365 KB |
| SC323_QA | Service campaign | Oct 29, 2024 | 11009489 | PDF, 63 KB |
| SC323_DPSM | Service campaign | Oct 29, 2024 | 11009487 | PDF, 42 KB |
| SC323_DP | Service campaign | Oct 29, 2024 | 11009486 | PDF, 61 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 Niro
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 2 model years this bulletin names have filed 84 complaints with NHTSA since 2015. 37 of them name Electrical System, Fuel/Propulsion System — 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.
The 12-volt battery system in my 2024 Kia Niro (VIN: ) has suffered two total failures in under one year of ownership (approx. 10,000 miles). In both instances, the vehicle was completely unresponsive, with no power to essential systems. Safety Risks and Incidents: 1. : Vehicle experienced a total power loss.
2024 Kia Niro · Electrical System · filed with NHTSA Jan 7, 2026 · ODI 11709314
Check electric vehicle system warning light indicator illuminates and car stops driving on highway! A/C and defrost won't work properly and when turned on causes the above warning light and malfunction. Car will not charge at "fast" charging stations and will leave you stranded on highway.
2023 Kia Niro · Electrical System · filed with NHTSA Jun 15, 2026 · ODI 11744166
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 fuel/propulsion system
Source: same model, same component group3 other manufacturer communications filed against the Kia Niro under the same component group (fuel/propulsion system), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SC338 | Emissions | Sep 12, 2025 | TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: BMS S/W LOGIC IMPROVEMENT FOR DTC P1BB2 (SC338) - This bulletin has been r… |
| SA512 | Service bulletin | Mar 3, 2025 | TECHNICAL SERVICE BULLETIN: SERVICE ACTION: INVERTER COOLANT/DEBRIS FLUSHING/REPLACEMENT FOR CLUSTER MESSAGE “REFILL INVERTER COOLANT”… |
| TSB_ELE298 | Service bulletin | Sep 18, 2023 | TECHNICAL SERVICE BULLETIN: EV BATTERY POOR/NO CHARGING CONCERN ICCU REPLACEMENT - This bulletin provides information regarding a poor EV ba… |
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 SC323 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 SC323 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 SC323 cover?
The manufacturer filed it against 2 model years: 2024 Kia Niro, 2023 Kia Niro. 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: 2023-2024MY Niro EV (SG2 EV): built on or after 11 Jul 2022; Niro EV (SG2 EV): built 11 Jul 2022 – 23 Feb 2024 — the build date is on the certification label in the driver’s door jamb.