66 31... Replacing screws on ACC sensor unit

WARNING: This page is about a different car, the 2010 BMW M5, 2009 BMW M5, 2009 BMW 550i, 2008 BMW M5, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove ACC sensor .

IMPORTANT: Visually inspect sensor housing for damage/leaks.
Replace ACC sensor if sensor housing is damaged.

Grip sensor housing (1) by screw in a vice (2).

Release screw by turning sensor housing (2).

IMPORTANT: After releasing screws, check sensor housing (1) again for damage.
Replace ACC sensor if sensor housing (1) is damaged.

Fig 1: Sensor Housing In Vise

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: For purposes of clarity, graphic show ACC sensor holder removed.

Replace plastic nuts (1).

Fig 2: Identifying Plastic Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Carry out rough adjustment of ACC sensor (1) at adjusting screws (2).

Measurement A [mm]: 42.5 to 43.5

Fig 3: Identifying ACC Sensor And Adjusting Screws
Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Adjust ACC sensor