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General E46 Forum
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Old 05-15-2014, 08:03 PM   #1
segments
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Join Date: Jan 2014
Location: NY
Posts: 37
My Ride: '03 E46 325i
Sunroof Problems :(

It looks as if one sides slides back and forth fine, and the other side doesn't slide. I have videos of what I mean.
http://s71.photobucket.com/user/DanA...e6881.mp4.html
http://s71.photobucket.com/user/DanA...tml?sort=3&o=0
Lemme know guys, maybe its off track ? Thanks !
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Old 05-15-2014, 08:17 PM   #2
hailstorm350
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Join Date: May 2014
Location: Sunnyvale
Posts: 4
My Ride: '03 330i
Your video looks EXACTLY like what happened to me, and I've seen this on multiple occasions. The cassette is likely broken. What this means is the cable on the side that is refusing to slide is actually popping out of the track that holds it in place.

If you want to diagnose it, you'll need to take your roof liner off enough to see what's happening right near the dash lighting cluster and underneath the sun shade on the side of the sunroof that's not sliding. Get your eyes under there and you should be able to see the large black metal piece bend down towards the ground and the cable coming out towards the front of the car (that's where mine broke).

If you don't want to damage things any further, and what I recommend, is to go in and actually unplug the sunroof motor so that you don't mess it up anymore. Of course get it in the standard closed position first. If you keep messing with it, you'll have to physically unmount the glass and put it into place so that you won't get rained on.

bmrparts has some cheaper replacement cassettes (ask for it without the glass if you don't need it), but the labor to replace it is extremely expensive (listed as 6 hours in the dealership), so I've held off and you will likely too. If you do decide to fix it, make sure to buy the $80 slider upgrade kit so that things work even better.

Good luck!
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Old 05-15-2014, 08:42 PM   #3
KieranG
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Join Date: Mar 2014
Location: NJ
Posts: 157
My Ride: 2000 323i
Do a quick search about it, this is a thoroughly covered topic and has many DIYs written about all the issues that have been had with sunroofs. Good luck!
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