The Volkswagen Passat was a stellar car in the 2000s. Volkswagen reached a pinnacle with the design, the car drove better and lasted longer than before. But the parts used in the 2000s Passat were still problematic once the car aged. As a used car, the Passat was one of the most expensive models to keep on the road (via Readers Digest).
Special editions such as the W8 only amplified that fact with an engine notoriously difficult to repair. The Passat had some strong attributes, but the high price of repairs can’t be ignored. There were better cars from the same era that required less attention in the maintenance department.