I have a 2001.5 New Passat with the V6, currently with 49K miles. In 12/04, with 29k miles the breather tube with the integral pcv valve clogged. I noticed it because there was such a strong vacuum being pulled inside the valve covers that air being sucked through minute openings sounded like a squeaky belt. Once I figured out it really wasn't a belt squeak I took it to the dealer for repair. Unfortunately, thinking it was just a belt squeak I ignored it for a while and the vacuum also collapsed the brake booster hose which had to also be replaced. 13 months later in January 06, it clogged again. Same sqealing sound but I caught it quickly. Just the breather tube replacement this time. 10 months later and I just noticed the valve covers are under intense vacuum again (I can tell because the vacuum makes tough to get the oil filler cap off when the engine is running and up to temp). I'm sure its the breather tube again. The question I have is what might be causing these frequent failures? I can accept a periodic failure, but this seems excessive. Is there something else my friendly dealer isn't catching that could be causing this? Or, is this a common problem on the V6 B5.