Necessary preliminary tasks

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.

Read out fault memory of DME control unit
Switch off ignition
Remove ACOUSTIC COVER

Picture shows the left side, the procedure for the right side is identical.

Unlock plug (1) and remove.

Release screws (2).

Tightening torque 13 62 6AZ .

Pull air-mass flow sensor (3) out of upper section of intake filter housing.

Installation:

Replace gasket on air-mass flow sensor.

Fig 1: Identifying Air-Mass Flow Sensor With Plug And Mounting Screw

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check stored fault message.
Now clear the fault memory.