BMW Z4 2009–2014 — technical service bulletin
Bulletin 160313 · NHTSA communication 10147928 · issued Jan 1, 2014
Technical service bulletin
communication type
Fuel System, Other
component
2009–2014
model years
6
vehicle entries
Official summary
N52K, N54 and N20 Engine - Noise from Fuel Tank. The customer complains of a noise from the underside rear portion of the vehicle. When diagnosed the noise is coming from the fuel tank. CAUSE A manufacturing defect inside the electric fuel delivery unit (in-tank fuel pump) pressure limiting valve will result in a noise while driving. This defect will not lead to fuel pump failure or loss of power.
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.