Convertible BMW Window Installation Instructions
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This repair will require 2 people (One person working from the inside, and one person working on the outside). Expect to spend at least an hour.

Repair should be done at temperatures at or above 68 Degrees F. Take off all jewelry (watches, rings).

Roll down all the side windows.

Lift Convertible top up about 6 Inches.

Starting in the Middle of the window on the outside, lift the piping with a butter knife and pull the fabric out of the profile, being careful not to damage the profile or your top.


Remove the rectangular shaped retaining clips (on the inside and outside of the window) by prying with a screwdriver.


Using a butter knife, or screwdriver unzip the zipper by prying between the 2 zipper ends. (you can also use an oversized zipper slider to unzip the window.) Once the zipper has been opened, it seperates easily, even without any tool.

Gently press the old window from the outside pushing in to remove the window.

Install the new window from the inside.


Put the provided zipper slider on the new window first.

Working from the inside of the car, start the zipper on the zipper end that is more toward the outside of the car. Have your assistant hold the window into position, so you can see how far (how many teeth) to push the zipper slider on the window. You will notice that there is no starting tab on the window, so the zipper must be started on the window first. Now zip the new window in.

The factory install guide allows only 1 tooth offset to the right or left. If you have diagonal wrinkles, it means that the window is skewed either to the right or left. It's OK to have vertical wrinkles.

Put the top back up all the way, but do not lock it.

Using a needle and thread, sew both ends of the zipper closed.


Apply the contact cement to the underside of the canvas trim on the new window and the corresponding part of the top that will seal and let it dry for 10 minutes or until it gels. Do not connect those two sections for at least 10 minutes. I would apply a second round of glue after 5 minutes, because most people don't apply enough glue, but you still have to wait 10 minutes.

After 10 minutes, insert the top material and into the canvas flap. If a corner will not stay glued, you can reglue it and as a last resort, you can sew it down.

If you have finished the installation and you have diagonal wrinkles in the window plastic, then the window isn't aligned correctly. By looking at the diagonal wrinkles, start the window either to the right or left of your original starting point. Note that if you move the bottom of the window to the left, the top of the window will be moved to the right.