Necessary preliminary work

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2014 BMW Alpina B7L, 2014 BMW Alpina B7, and 2013 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

Follow BMW diagnosis instruction
Remove OIL PRESSURE SWITCH

Special tool 11 4 050 is equipped with a sealing ring (1).

IMPORTANT: Tightening torque of special tool 11 4 050 max. 20 Nm.

Fig 1: Identifying Special Tool (11 4 050) And Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Screw special tool 11 4 050 into crankcase to max. 20 Nm.

Secure union nut (1) of special tool 13 3 063 to max. 15 Nm.

Fig 2: Identifying Union Nut And Special Tool 11 4 050

Courtesy of BMW OF NORTH AMERICA, INC.