Necessary preliminary tasks

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

Remove COIL SPRING AT REAR
If necessary, remove jointed rod of ride-height sensor from camber arm bracket
Remove rear SHOCK ABSORBER FROM RUBBER MOUNT
Remove CAMBER ARM FROM WHEEL CARRIER
Remove TRAILING ARM FROM WHEEL CARRIER

Pull out and remove ball joint with special tools 33 4 465, 33 4 466, 33 4 475, 33 4 474 and 33 4 482.

Fig 1: Removing Ball Joint Using Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Push in new ball joint until it stops using special tools 33 4 481, 33 4 474, 33 4 475, 33 4 466 and 33 4 465.

Fig 2: Installing Ball Joint Using Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.