Kia bulletin PI2603
Kia filed this with NHTSA as a manufacturer communication dated Jun 17, 2026, about the electrical system — 5 documents under this number: PI2603_OWNR, PI2603_TSB, PI2603_QA, PI2603_DPSM and more. It names 3 model years (2020–2022). A manufacturer communication is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationTECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: BMS BATTERY DIAGNOSTIC LOGIC IMPROVEMENT (PI2603) - This bulletin provides information regarding a Battery Management System (BMS) software update for certain 2020–2022MY Niro (DE EV) vehicles produced from June 2, 2020, through November 8, 2021. Kia has developed improved battery health monitoring software to enhance the BMS diagnostic performance of the high-voltage battery (HVB) cells produced by a specific supplier in the subject vehicles. This improved software will enhance the long-term issue detection capabilities of the high-voltage battery in the subject vehicles.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PI2603_OWNR | Other | Jun 17, 2026 | 11033932 | not yet checked |
| PI2603_TSB | Service bulletin | Jun 15, 2026 | 11033933 | not yet checked |
| PI2603_QA | Other | Jun 15, 2026 | 11033931 | not yet checked |
| PI2603_DPSM | Other | Jun 15, 2026 | 11033930 | not yet checked |
| PI2603_DP | Other | Jun 15, 2026 | 11033929 | 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 PI2603 a recall?
No. A manufacturer communication 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 PI2603 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does PI2603 cover?
The manufacturer filed it against 3 model years: 2022 Kia Niro, 2021 Kia Niro, 2020 Kia Niro. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.