Service bulletins for the 2020 BMW M340i
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.
251 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Body and frame are shown. Show all
| B510220 | 2020-02-18. Service bulletin. STRUCTURE. RATTLE NOISE FROM COWL TRIM: A rattle noise is present while driving from the cowl area under the windshield at temperatures below 50C°F. The rattle may be present from either or both sides (right and/or left). At temperatures below 50C°F the cowl panels below the windshield can contact the adjacent panels. |
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| B541519 | 2020-01-21. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY; VISIBILITY; STRUCTURE. GROANING NOISE FROM SUNROOF: A groaning noise is present from the sunroof glass panel while driving over rough road surfaces or during body flex. The noise may also be present while the sunroof is opening into the vented position. Interference between the sunroof glass panel perimeter seal and the vehicle roof. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.