BMW 525D Xdrive 2014–2016 — technical service bulletin
Bulletin B160316 · NHTSA communication 10146785 · issued Nov 1, 2016
Technical service bulletin
communication type
Engine and Engine Cooling
component
2014–2016
model years
4
vehicle entries
Official summary
BUZZING OR CLICKING NOISE FROM THE SCR TRANSFER PUMP. There is a buzzing or clicking noise coming from under the car that can be heard from the passenger compartment when the engine is at idle. Normal operation of the SCR transfer pump delivering diesel exhaust fluid (DEF) from the passive to active tank.
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.