Hyundai service campaign 9C5
Hyundai filed this with NHTSA as a service campaign dated Sep 9, 2026, received Aug 21, 2026, about the fuel/propulsion system — 4 documents under this number: 9C5 OL, 26-01-065H DCS, 26-01-065H TSB, 26-01-065H DN. It names 8 model years (2019–2023). 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 communicationCertain Kona Electric (OS EV) and Ioniq Electric (AE EV) vehicles are eligible for a Battery Management System (BMS) software update. This update to the BMS software improves the system's diagnostic capability. Follow Technical Service Bulletin (TSB) 26-01-065H to complete the BMS software update.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 9C5 OL | Service campaign | Sep 9, 2026 | 11037293 | PDF, 164 KB |
| 26-01-065H DCS | Service campaign | Aug 17, 2026 | 11036686 | PDF, 44 KB |
| 26-01-065H TSB | Service campaign | Aug 14, 2026 | 11036311 | PDF, 409 KB |
| 26-01-065H DN | Service campaign | Aug 13, 2026 | 11036685 | PDF, 519 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.
Common questions
Source: NHTSA, 49 CFR 579.5Is Hyundai 9C5 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 9C5 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 9C5 cover?
The manufacturer filed it against 8 model years: 2021 Hyundai Ioniq, 2020 Hyundai Ioniq, 2019 Hyundai Ioniq, 2023 Hyundai Kona, 2022 Hyundai Kona, 2021 Hyundai Kona and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.