BMW 330I 2019–2020 — technical service bulletin
Bulletin B510220 · NHTSA communication 10171490 · issued Jan 1, 2020
Technical service bulletin
communication type
Structure
component
2019–2020
model years
3
vehicle entries
Official summary
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.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.