Service bulletins for the 2021 BMW X4
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.
168 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Seats are shown. Show all
| B521823 | 2024-01-03. Service bulletin. SEATS. A noise can be heard from underneath the seat while the seat is being moved either forwards or backwards. This can occur to the driver’s and/or the passenger’s front seat. |
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| B520122 | 2022-06-21. Service bulletin. SEATS; SEAT BELTS. A groaning noise can be heard when accelerating and cornering from the area of the shoulder safety belt support(s). The complaint can occur in both the driver's seat and the front passenger seat. |
| B520221 | 2022-05-16. Service bulletin. SEATS. Milky-white stains (discolorations) in the leather are observed in the second-row seat bottom, backrests and/or headrests. Refer to attachment for details. This only affects vehicles with the Merino leather. |
| B520221 | 2022-01-24. Service bulletin. SEATS; EQUIPMENT. Milky-white stains (discolorations) in the leather are observed in the second-row seat bottom, backrests and/or headrests. |
| B110321 | 2021-07-06. Service bulletin. SEATS. B58 ENGINE: ENGINE OIL FILTER REMOVAL PROCEDURE AND TOOLS . A. For the B58 engines, a BMW Oil Catch special tool for use in conjunction with removing the engine oilfilter insert is now available. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.