High-end German carmaker, part of the Volkswagen group.

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Audi a4 2007 2.0T boosts but poor performance, fuel economy

My 80,000 mile 2.0TFSI Turbo Audi has lost a lot of performance but no check-engine-light (CEL) or codes. One month ago an independent garage looked at it and did $2200 of work including transmission ...