Necessary preliminary tasks

• Remove REAR BUMPER TRIM 
• If necessary, release exhaust system suspension elements

Release screws (1) on both sides.

Unclip cable from fixture.

Remove trailer tow hitch support member (2).

Disconnect all plug connections.

Fig 1: Identifying Trailer Tow Hitch Support Member With Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Only vehicles up to production date 07 March 2005: 

Knock out studs (1) towards inside and replace with M12x40 hexagon bolts.

Fig 2: Identifying Studs

Courtesy of BMW OF NORTH AMERICA, INC.