Adjusting pretension

Slacken nut (3) with reversing ratchet (2) of special tool 51 3 300 (consisting of 51 3 301, 51 3 303, and 51 3 304 .

Turn the knob (1) on the special tool 51 3 300 to turn the stud (4) and thereby alter the pretension.

Tighten nut (3).

Tightening torque 51 33 1AZ, see 51 33 POWER WINDOWS, FRONT .

Check adjustment, repeat procedure if necessary.

Fig 1: Identifying Slacken Nut With Reversing Ratchet Of Special Tool 51 3 300

Courtesy of BMW OF NORTH AMERICA, INC.

Checking run-in of door window glass:

Door window glass must strike the inside of the seal.

Check adjustment of rear side window  , adjusting if necessary.