BMW X3 2018–2020 — technical service bulletin
Bulletin B610220 · NHTSA communication 10174017 · issued Apr 1, 2020
Technical service bulletin
communication type
Back Over Prevention
component
2018–2020
model years
5
vehicle entries
Official summary
KNOCKING NOISE FROM WASHER FLUID RESERVOIR: When driving over uneven pavement or cobblestones a knocking noise is present from the passenger side front area (A pillar). Once the vehicle is driven on a flat even surface; the noise is no longer present. CAUSE Washer fluid reservoir movement caused by mounting bracket clearance.
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.