Necessary preliminary tasks

WARNING: This page is about a different car, the 2012 BMW 328xi, 2011 BMW 328xi, 2010 BMW 328xi, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect BATTERY NEGATIVE LEAD .
Remove FRONT LEFT WHEEL ARCH COVER (REAR SECTION) .

Release screw (1) and remove grounding cable.

Unlock plug (2) with a suitable tool and detach.

Open cable tie (arrowed).

Unclip cable holder (4).

Unlock plug (3) with a suitable tool and detach.

Installation:

Replace faulty cable holder (4).

Fig 1: Locating Cable Holder, Plug And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew nut (1).

Tightening torque 32 43 1AZ .

Release screw (2).

Tightening torque 32 43 1AZ .

Remove active front steering control unit (3).

Fig 2: Identifying Active Front Steering Control Unit, Screw And Nut

Courtesy of BMW OF NORTH AMERICA, INC.