I've talked to a bunch of owners about this issue and it seems that the cars that were built in March/April have the "older" 20v Turbo cover on the engine. The cars built in May or later (like mine) have the "newer" 1.8t cover on them. VW just used the leftover 20v covers that they had in the parts bin until they ran out, then started with the new ones. My dealer had a couple of 2003 GTI's that just came in and they all had to 1.8t cover on them.
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