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Old 11-20-2009, 01:39 PM
llando88 llando88 is offline
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Location: On The Move
Join Date: Jul 2003
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Mein Auto: Ram 2500 4x4
So here we go:


This DIY procedure is to replace a failed window regulator for a 2003 E46 330i Sedan, LHD.

Your car may be different. Work slowly and carefully. Your mileage may vary. Do not swim within 30 minutes of eating.


Torx T30
Torx T20
8 mm socket
10 mm socket
1/4" 4" Socket Extender
1/4" 6" Socket Wrench
Petzl 3xAAA Headlight
Swiveling Inspection Mirror
6" duck-bill pliers
Plastic Pry Tool or similar

Parts Used

1 x BMW OEM E46 Right Rear Window Regulator Part No. 51358212100 (see picture three).


Prior to beginning: If possible, lower window approximately 2 / 3 of the way down. (this is to aide access to the window/regulator retaining fitting later in the procedure.)

1) Use plastic pry-bar tool, loosen trim strip at rear and pry out (trim strip is retained by 4 x press-lugs). Set trim strip aside.
2) Use plastic pry-bar tool, loosen 2 x panel attachment trim covers from underside of armrest
3) Remove two T20 torx screws from under side of armrest
4) Use plastic pry-bar tool, loosen door window switch trim panel and lift door window switch up and out.

Caution: wire fitting will hold switch to door.

5) Remove T20 low-thread count screw from upper (forward upper)
6) Remove T20 torx screw from upper side of door panel (rear upper)
7) Remove T20 torx screw from within the window switch area

8) Starting at lower rear of door panel, insert fingers and gently but firmly start to pop door panel plastic rivets.

Note: Work your way slowly under the side, then up and around the forward and rear edges of panel, popping plastic rivets loose.

9) Lift door panel 6" out at the bottom, then work the whole panel loose from the top edge attachment points.
10) Hold door panel away from door and dis-engage pittman arm from door lever.
11) Separate the electrical connector from the door speaker.

12) Carefully remove the door inner weatherproof seal cover.

Note: Take care not to tear weatherproof seal as you separate the seal from the door. The black plastic goo is very sticky. Set cover aside.

13) Lower the window (by hand, either from inside the window or from above) approximately 2 / 3 down, until the window/regulator regaining fitting can be seen.

14) Undo the window/regulator retaining bolt.

Caution: Retain the nut from behind with your fingers so that it does not fall into the bottom of the door as the bolt is withdrawn. (8 mm Socket) (see picture two)

15) Raise the window (by hand, either from inside or from above) all the way to the top. Wedge in position (duct tape, wedge, helper etc.)

Note: This gets the window glass out of the way when the regulator is removed.

16) Unplug the the window motor electric connection and remove from the window motor.

17) Remove the three regulator retaining nuts (10 mm Socket). (see picture one)

18) Manouevre the regulator out of the door (rotate counter-clockwise and slide out forward.)

19) On the work bench, remove the 3 x T30 Torx bolts attaching the window motor to the regulator and remove the motor from the old regulator. (see picture one)

20) Attach the window motor to the new regulator.
21) Reinstallation is the reverse of removal.

Caution: Do not over-torque the window retaining bolt.


1) 10 mm socket wrench on the middle of the three regulator retaining nuts. Also shows the T30 Torx on the one of the three motor/regulator retaining screws
2) 8 mm socket wrench on the window/regulator retaining bolt
3) New vs Old (top/bottom) window regulators.
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“Character is doing the right thing when nobody’s looking. There are too many people who think that the only thing that’s right is to get by, and the only thing that’s wrong is to get caught.”

- J.C. Watts Jr.

Last edited by llando88; 11-20-2009 at 01:48 PM.
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