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From seeing everyone's pictures, I suspect I may have an older-style fan on my car. Mine is the variety with no "cage" and (I think) fewer blades. All of the S3 pics I've seen have more blades (again, I think...I didn't count them) and a cage or fan grill around it.
Do I have an older-style fan? Should I care? It works...I'm not worrying about keeping everything original...however if there is a significant improvement in efficiency, I might consider going to the newer style.
Thanks for the info. From other folks' pictures, I'm guessing I should have the one with the cage, but I won't worry about it unless something happens to this one.