Bosch makes the part for Porsche. Porsche stencils their part number onto it, boxes it and marks it up. If you remove the old part, record the Bosch part number and order that one with pigtail, you should be just fine and your wallet finer by a bunch. I was twice for my '01S.
There is a table
here listing O2 sensors part numbers from Porsche and Bosch. It is, to the best of my knowledge, accurate as of a few years ago. I invite corrections.
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