I hit up the local pick and pull to get a replacement sunroof guide. The first car I worked on was a 2003 A4 V6. Now that I know how easy it is to pull the glass I had it out in five minutes and with a bit of careful prying I had an intact guide. I also pulled the dome light assembly apart so I could move the window. I noticed that the V6 had some extra map lights in the assembly.
EDIT: I looked up the part number and its actually a IR motion detector, I had no idea. Some info on it:
https://www.audizine.com/forum/showt...4-Shock-Sensor
Looking at my new part I noticed a faint silver line in one of the arms on it. That sure looks like a crack, and its where the others have broken. I figure I should try and find one that looks better. I checked out a B7. The B7 uses the same basic design but the casting is reinforced right where mine broke. I got the part out in one piece (it takes some patience). Once I had the new part I tested the one that looked bad, and sure enough the arm broke off with very light pressure. I did the same test on the other end with the same result, both arms were fatigue cracked and just hanging on.
I was pretty psyched to figure out that the part used in the B7 is an upgrade and fixes the one of the sunroof rattle issues (broken support).
Photos:
On the left you can see differences between the B6 vs the B7 sunroof metal bars. The B7 part (lower) has a lot more reinforcement at the base of the arm. On the right I have a the map light insert from the V6 model, it replaces the white plastic insert and the harness already has a connector for it (it turns out its an interior motion sensor for the alarm).
Screenshot 2025-04-06 160933.jpg
Headliner shell after it big cleanup.
Screenshot 2025-04-06 160830.jpg
Removing the deteriorated foam with a putty knife. The foam had turned into gooshy sticky goo. I used solvent to wash off the remaining sticky film. The insert still has a bit of a tacky feel, so it's not perfect but I got it as clean as its going to get.
Screenshot 2025-04-06 162235.jpg
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