Service bulletin B520120
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11034458 |
| Published by NHTSA | 2026-07-03 |
| Manufacturer's number | B520120 |
| Manufacturer's date | 2026-06-27 |
| NHTSA component | SEATS |
NHTSA's summary
When getting in or out of the vehicle, a groaning noise can be heard from the opening (aperture) in the seat backrest. The noise may be heard from one or both of the front seats.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Seats
| BMW 230I | 2024 |
|---|---|
| BMW X2 | 2024 |
| BMW Z4 M40I | 2024 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| B521225 | 2025-09-22. Service bulletin. A clicking noise can be heard from one or both front seat backrests. This noise is heard when leaning against the backrest of the seat or while the vehicle is cornering. |
|---|---|
| B520425 | 2025-03-21. Service bulletin. Customer states he/she sees a check control message for the rear seat not being locked. The following fault codes stored in the air bag ACSM6 control module: 930C19 - Backrest Sensor right 2nd seat row: open circuit 930D76 - Function rear restraint system restricted |