Question about 2003 Audi A4 Cabriolet

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Rear window glass has loosened from the roof

The glass which is the rear window on my 2003 audi a4 convertible has loosened from the cloth roof in the lower right and left corners. It has been glued a couple of times, but every time it loosenes again quickly. Water seeps in when it is raining. I have even been in touch with 3M to see if they have a glue strong enough to stand the strain from the roof going up and down. Tried one of their glues without luck. It only lasted a few days. Audi claims that a replacement roof will run me 5,000 USD... How can I fix this?

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  • lilico3 Oct 23, 2008

    My rear window glass has loosened and they also offered me the 5000 dollars solution.They told me glues do not work.

  • peterbl Nov 03, 2008

    Same problem. I've not found anyone that is confident about gluing. I've got some heavy duty contact adhesive from 3M that I'll probably try.

  • geekspeak58 Dec 05, 2008 too, guess it sux to be us. Even worse mine is a 2005 with 70k miles. Problem really is the florida's so hot! I've tried gluing it, same result as you guys. I found a shop here in Orlando with a $1500 price, same guy who did my Mitsubishi Eclipse top. Love the car, hate the idea of fixing this....might just trade it in.

    Good luck all

  • lwboyd Jan 05, 2009

    I have a 2003 A4 Cabriolet. The car just has 30000 miles on it and the rear glass has become separated from the soft top. I've been told that the only solution was a new top to the tune of $4000. Audi needs to stand behind their product. No one in my area will even attempt to fix it. This car stays in a garage unless I'm driving it. If anyone has a better solution please let me know.

  • serjkiborg Mar 01, 2009

    Hi. I have the same problem with my 2003 convertible. However I am trying o fix it myself. I really like the idea of geekspeak58 with the 5$ glue. I am really curious to find out if it lasts untill now.

    Please, could you give me an update on your convertible, geakspeak 58. 

  • MariaFeliz Mar 04, 2009

    Same problem with my 2003 Audi A4 Cab. The car is garaged M-F and only has 30K miles. I had an upholstery shop here in Los Angeles, glue mine back. Batz in Culver city charged me about $95 last summer. Seems to be holding OK, but I'm a little leary about using the top.

  • Anonymous Apr 20, 2009

    Have any of you had the glass taken out and had a plastic window sewn in? Much cheaper option than to replace the entire roof.
    Scott NJ

  • dalonso May 04, 2009

    I have an '04 S4 and same issue. The Audi dealer (Miami) says the only way is to replace the whole thing ($4,500). What's worse is I purchased the extended warranty with all bells and whistles (close to $2,000) to cover anything that could happen. But guess what, they say this is trim and therefore not covered. How can glass on the roof be trim? This is a convertible, of course the roof is made out of cloth - but it is still the roof!!!
    I think this is clearly a manufacturing issue on Audi's behalf. There is no reason we (and most likely anyone else with a convertible -'03, '04, '05 and maybe other years? - Audi owners (which as you all know cost a pretty penny) should have to resort to creativity, trial and error and anything else to make our rear glass stick to the un-sticking roof!
    I say we all put our signatures together in a letter to Audi. It's time they take care of this.

  • Tinker V May 10, 2009

    I had the same issue with my 2003 A4 last year and agree with one of the posts that this is a manufacturing issue and something should be done. I wrote a letter, made many calls and through much determination and perseverance (headache), Audi replaced the top at no cost. 

    Outside of this, my warranty just ended & I'm searching for a reliable, trustworthy extended warranty company to cover any future issues. Especially with all the computer systems & fuses that start to malfunction and are expensive to replace. Any suggestions would be greatly appreciated.

    ALSO, Anyone have a recommendation of a trustworthy Audi technician in the Studio City, CA area? My convertible top will no longer go down when pressing the button. the windows go down but then nothing happens.



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Well I went to Lowes and shopped for a construction adhesive. I picked PL brand Polyurethane Premium Construction Adhesive because it is (so they say) 3 times stronger than ordinary adhesives.
It is also water and weather proof
Bonds to wood, metal, stone, concrete, masonry, bricks, vinyl, plastics
It came in a tube (you know.. chaulking gun style)

How could it NOT hold glass to fabric??? Thats what I said to myself.. well when we have nothing to lose, we'll try anything.

I put a good bead about 3/8 of an inch in between the glass and fabric, waited 7 days and then razored the excess off the glass. Applied black permanent marker and I'm done. So, it's been about 2 weeks and it's holding well so far.
I'm a betting man, but I won't bet this is going to hold... would you?

Posted on Dec 18, 2008

  • geekspeak58 Jan 02, 2009

    Still holding ..

    I'm very happy with this construction glue.

    I've already shaved off the extra and colored it with black magic marker.

    This tube of glue cost about $5

    Oh, I put a pillow in the back windo to take the pressure off the glass when I glued it.


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We have had success in regluing back glasses to convertable tops for 2 years.We are located in LEE COUNTY south west florida.CALL 2392753747

Posted on Sep 26, 2011

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I had the same problem on a 2005 S4. My Audi dealer here in Pittsburgh sent me to an auto trim shop that sealed the window with "an epoxy after releasing the pressure around the glass" (their words).

It only cost $450. The shop said they've done this before and were confident it would solve the problem.

If you're in the Pittsburgh area the shop is called Michael's Auto Trim Shop and it's in Penn Hills on Leechburg road.

If you're not in the Pittsburgh area I would suggest trying to find an auto trim and upholstery shop that might be able to do the same thing.

Posted on Dec 18, 2008

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I just had my top replaced due to the same problem (glass loose). Audi told me this was the first year karmann (I believe of karmann ghia fame) made the convertible tops and the 2003 models have had a bunch of failures in the 4+ year range. They also told me the newer tops last longer. Be careful if you get the top replaced, ask for Audi original. I didn't ask the repair shop for the true Audi top and got an OEM replacement. I notice there is no flat seam next to the rear window, so when it rains the water tends to pool up near the bottom of the glass and the top is wavy under the rear glass.

Posted on Nov 11, 2008

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