Verifying parts

Reefmaile

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Joined
Dec 27, 2024
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Hi

just wondering if there is a way to verify factory parts that came with my Audi A7 sline premium plus car. Every time I take it to the dealer for service it seems to run a lot harder and less smooth. Can people switch parts for basic Audi parts to enhance their car? What could I do to verify that all my motor part are the one specific to my sports car?