Polestar bulletin 37421.4.0
Polestar filed this with NHTSA as a service bulletin dated May 6, 2026, received Jul 14, 2026, about the unknown or other. It names 3 model years (2024–2026). A service bulletin 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 communication- This is a Technical Journal: Wind Noise from Side Window. Before replacing any parts, follow the checklist below. 1. Check the calibration of the window. Recalibrate if needed. 2. Inspect the sealing for any damages or deformations. Replace if needed
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 37421.4.0 | Service bulletin | May 6, 2026 | 11035008 | 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 themAlso filed against model years this site has no page for: 2024 Polestar Polestar 3.
A 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 Polestar 37421.4.0 a recall?
No. A service bulletin 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 37421.4.0 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 37421.4.0 cover?
The manufacturer filed it against 3 model years: 2026 Polestar 3, 2025 Polestar 3, 2024 Polestar Polestar 3. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.