BMW 320I 2012–2015 — technical service bulletin
Bulletin 510514 · NHTSA communication 10147972 · issued Feb 1, 2014
Technical service bulletin
communication type
Structure
component
2012–2015
model years
20
vehicle entries
Official summary
Service Action: Remove and Discard Water Drain Plugs from E-Box. Water leaks into the cabin due to clogged drain plugs in the E-boxes. CAUSE The drain plug slots are too small and clog.
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.