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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

 
 
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Old 10-21-2006, 02:02 PM
Mister Chow's Avatar
Mister Chow Mister Chow is offline
Officially Welcomed to the 'Fest
Location: Toronto
 
Join Date: Jan 2006
Posts: 889
Mein Auto: 1999 528i
Repairing Power Seat Switch-DIY

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So the switch for the power seat snapped off and I figured it was going to be a "cheap" fix with a new plastic stud from BMW. Well no, the little plastic stud is part of the whole switching control box and costs a bundle.

I tried to glue it back together but it was like building a ship inside a bottle so I decided to open'er'up and try to do a better fix.

First thing, remove the switch covers. They pull straight out. Don't twist!

You'll have to take the side trim panel of the seat off. This photo is looking from the driver's footwell. You need to pop out a plastic clip (that took a lot more force than I thought!) and undo a torx screw. There's another plastic clip on the back of the seat but it's possible to access everything without having to pop that one out.
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The switching control box is clipped to the trim panel and is plugged into the actuators.
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Disconnect the plug and unclip the control box.
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And this is what it looks like. I took the picture after I fixed it so both studs are complete.
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This is the toughest part of the job. To open the box up you have to flip open all 8 plastic clips simultaneously and pry the box open. Thankfully there's no glue. I used bits of cut up plastic to hold each clip open and then used a thin screwdriver to pry the box open.
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