BMW 320I 2012–2015 — technical service bulletin
Bulletin 510514 · NHTSA communication 10147936 · issued Jan 1, 2014
Technical service bulletin
communication type
Equipment
component
2012–2015
model years
20
vehicle entries
Official summary
Service Action: Remove Water Drain Plugs from E-Box. The water drain plugs for the left- and right-side E-box may clog. This can lead to water collection/corrosion and allow water to enter the passenger compartment. CAUSE The water drain plug slots are too small.
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.