BMW 320I 2012–2014 — technical service bulletin
Bulletin B270215 · NHTSA communication 10147134 · issued May 1, 2015
Technical service bulletin
communication type
Electrical System
component
2012–2014
model years
13
vehicle entries
Official summary
Rattling Noise from Transmission Tunnel. A rattling or knocking noise is heard in the area of the gear selector switch (GWS) during engine load reversal. CAUSE The vent tube for the transfer case is making contact with the transmission tunnel.
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.