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Window regulator replacement, BMW 3 Series, 1998-2005

The following is what happened to Colin from our customer service team when he realised that his window regulator was knackered. It's proves one thing....Impossible is nothing! 

------

Operate window switch, hear the sickening noise of the cables letting go in the window regulator....

Release a volley of expletives.

Check up on internet how easy it appears to be to replace the window regulator. Convince yourself that this is easily within your ability!

Go out to shed to collect ratchet, 12mm socket, 10mm socket, ratchet screwdriver with assorted Torx and Phillips bits, thin pry bar and nitrile gloves. Fall over bicycles in shed and release a volley of expletives. Still convince yourself that this is easily within your ability.

Open boot and disconnect negative battery lead, so as not to introduce an airbag warning into ECU. Manually lock boot-lock, in case boot lid closes, causing mayhem with trying to open boot again with battery disconnected!

Remove this trim panel on door to reveal two Torx screws. Remove mirror switch to reveal another Torx screw. Remove two by oval screw covers under door handle to reveal the last two Torx screws. Remove these five screws and gently prise the door trim panel away from the door. Unclip the wiring looms from the speaker. Undo and remove the three 10mm bolts from the side airbag in the door and unclip the block connector. Relax the clench in the buttocks when you have put this explosive item down safely.

Remove the vapour barrier from the door, using a craft knife, avoiding lacerations and horrendous blood loss.

Stare in at the window regulator as your self confidence rapidly evaporates!!

Remove the three bolts and block connector that relate to the motor and remove the motor.
Remove the five bolts that secure the window regulator in place. Release a volley of expletives as you wrestle the knackered regulator out of the door frame. Ensure the glass does not fall into door frame by using a wedge. I used some cardboard from the new regulator box, although any suitable wedge would work, plastic, wood, beer mats or a bundle of Euro notes if you are flush with cash!

Offer motor to new regulator and realise there is a subtle difference in how the motor is held in place and release a volley of expletives. Take another trip out to the shed to find suitable nuts and bolts. Drop a box of assorted nuts and bolts on the shed floor. Release a volley of expletives, inventing new expletives to emphasize your clumsiness!

Find three suitable nuts and bolts in among the carnage now adorning the shed floor and give yourself a virtual high-five. Clean up the nuts and bolts back into their box, including the three that you need. Release a volley of expletives before spilling out contents again and retrieving the required items. Fall over bicycles in shed yet again and release a volley of expletives!

Fit motor to regulator and start the trick job of fixing the glass to the regulator. Fill yourself full of belief that this is a job that you can do, because you are not going to admit defeat and get a 'grown up' to help you.

Reconnect airbag and battery negative cable to facilitate testing of the regulator. A liberal spraying of silicone spray into the glass run guides helps here. Disconnect battery again and remove airbag.

In time honoured Haynes manual fashion, refitting is the reverse of removal.

Stand back and bask in the warmth of knowledge that accompanies your self- belief that this job was well within your abilities.

Apologise to your elderly neighbours for subjecting them to such atrocious language.

Round up all the tools and do not put them away, after all you do not want to fall over the bikes a third time in one day, do you?!!

Category: About Us

Author: The Filter Blog Team

4 February 2024
  • BOSCH10 Jan 26
  • Noco December 2025

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