car Alex on 02 Nov 2009
DIY window repair with $2.99 nylon cable ties
If you’re the owner of a BMW E46, you should be well aware of the infamous “window fuck-up problem”. This is a problem where your driver/passenger side window doesn’t go up or down. Even if the window manages to go up and down, it makes a nasty cracking/popping sound that sounds like glass grinding against metal. You’ll also find out that to fix this problem you’ll have to replace something called the window regulator, which will cost you in the neighborhood of $400 bucks + tax at the dealership. Sounds a little excessive don’t you think?
Not wanting to give the “stealer”-ship a chance to rip me me off again, I did a little research and decided to this myself. Now there are two ways to do this, either buy the window regulator from the dealership and replace the part yourself, or repair the existing one. Buying a new regulator will cost you about $160 + tax, going with the repair route will cost you about $2.99 (yep that’s right, two dollars and ninety-nine cents) in nylon cable ties. Being the cheap-ass that I am, I decided to go with the repair route. Here’re the tools you’ll need :
8mm socket
10mm socket
Torx20 driver
Torx30 driver
The magic nylon twist ties
1. Disconnect the battery. This prob. isn’t necessary, but I heard horror stories of strange fault codes being thrown from the computer when you start taking things apart and don’t disconnect the battery. So just to be safe, disconnect the negative battery terminal using the 10mm socket.
2. Roll down the window about half way. Don’t ask why, but I find this helps with detaching the window glass from the regulator later on.
3. We are now ready to take out the door panel. To remove the panel, you’ll need to expose 5 torx screws :
- One is located under the mirror control/insert cover
- Three are located under the trim
- The last two are located under the arm-rest
4. After you’ve pried all the door panel clips, you’ll notice several wires attached to the door panel. You’ll notice some (I had two) wires going to the speaker, a door opening wire, and if its the driver side there are two wires going to the mirror control. Disconnect all of these and remove the door panel entirely.
5. Now we need to remove the airbag. Careful with this one, apparently its an “explosive” device so be gentle. There are 3 screws holding the airbag, use the 10mm socket to remove them. After you remove the airbag, you can disconnect the wire and put it some place safe. I’m lazy, so I used one of those magic nylon cable ties and hung it on my door frame. Careful if you want to disconnect it though, I heard that if you reconnect the power while the airbag is disconnected, the SRS light will come on and you will need to reset that some how (most likely by paying the “stealer”-ship)
6. Here’s the “hardest” part. Actually, maybe not the hardest but this is the most time consuming and tedious part. That grey foam stuck to the door is actually the vapor barrier. This vapor barrier is fused to your door by some black shit, possibly some kind of weather chalking. You’ll need to carefully remove the vapor barrier without ripping it, otherwise you’ll have a very wet floor after a rainy night. I find the use of a heat gun (or if you’re ghetto like me, a hair dryer) really useful for this task. The heat gun (hair dryer) can also be used to re-apply the vapor barrier when you’re done with the repair.
7. After the vapor barrier is removed, you can now see the window regulator and the window regulator motor. The motor is secured using 3 torx 20 screws. Go ahead and remove them and take out the motor. You can unhook the motor I suppose, but I was lazy and I just let it hang there.
8. Before we can take out the window regulator, we’ll need to detach the window from it first. Remember how I said to lower the window half way? The window regulator is attached to the window with two clips. These needs to be unscrewed, and the only way to reach these screws are through a metal hole/slit. Lowering the window will put the position of these clips closer to the hole/slit. If you can’t find the clips you can use your hand to push/pull the glass up and down until they’re aligned. Once you located the clips you can go ahead and loosen them. I think they’re a 8mm socket.
9. After you loosen the clips, pull the window all the way up with your hands. You will not be able to remove the regulator unless you move the window up.
10. Now you can remove the 4 bolts (I think 10mm) holding the window regulator. Once the bolts are undone you can take out the window regulator. Removing the regulator requires a little imagination : The regulator itself is two steal bars held by criss-crossing wires. The wires are flexible so you can twist it to take it out. After I took out the regulator, I laid it on the floor. This thing doesn’t really look like any kind of a regulator to me. What is it trying to regulate? I’m not sure about that. What I’m sure is this stupid thing sure isn’t worth $160.
Fucking BMW sure knows how to make sturdy parts. This “regulator” is built like a tank, the metal is thick and the wires are tough. Be careful or you’ll cut your damn finger off when you pull this thing out. Why then, you ask, would such a sturdy part break? Take a look at the two metal “clips” which attaches to the window regulator. You’ll find the same high quality steel construction, but wait. What’s this? Some cheap ass plastic part that got broken off!!!
This little clip is what breaks 99% of the time. The metal cylinder on the wire is suppose to sit in the notch inside the plastic part. I guess over time this plastic gets brittle and breaks, so the cylinder pops right out and your window doesn’t move. Why the FUCK would those damn engineers build everything in metal but this part in plastic? It almost felt like they planned for this thing to fail.
11. If you bought a new regulator, simply throw this piece of garbage out and put in the new one. Since I didn’t even want to pay the $160 to fix some stupid plastic, I decided to repair this piece of crap. At this point, whip out your magic nylon ties. The idea is to bind the metal cylinder to the clip, mimicking what the broken plastic part was doing (and still would be doing if it was built fucking correctly in the first place). When tying the wire to the clip, make sure the cylinder is in the right place. Remember, we want to mimick the $160 piece of junk errr I mean hardware with our $2.99 nylon ties.
Recall there are two of these clips on your regulator. Might as well do the same thing to the other clip even if its not broken, hell this is German engineering so its just a matter of time till they break.
That’s it. Put everything back together in reverse order, connecting your battery last. Congratulations, you’ve successfully saved $400 bucks using a couple of $2.99 nylon cable ties.