This bulletin applies to 2019 BMW 430i Gran Coupe vehicles. While driving slowly with low engine rpm or while idling, a faint knocking or fluttering noise can be heard from inside the fuel tank. The customer may describe this noise as a “helicopter” noise from the rear of the vehicle.
BMW Engine Specialty Tools
Specialty tools are available for oil pump/sprocket service on all BMW models with B3x, B4x or B5x engines. An oil pump sprocket tool P/N 83 30 2 463 965 includes an extension bar and T30, T40 and T45 drivers.