BMW 228I 2016–2021 — technical service bulletin
Bulletin B640520 · NHTSA communication 10182921 · issued Oct 1, 2020
Technical service bulletin
communication type
Equipment
component
2016–2021
model years
17
vehicle entries
Official summary
CONDENSATION FROM AIR CONDITIONING LEAKS INTO PASSENGER FOOTWELL: Condensation from the air conditioning systems evaporator drips, below the instrument panel, into the passenger's footwell. During assembly, the cover of the fresh air intake was not fully seated when the screws were tightened. This cover can then leak condensation out through the existing gap.
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.