CAM Adjustment

My 2001 1.8T Passat (73K)went in for service today due to leaking oil and lagging power on the start. Dealer called and said it was the following:
Bad O2 Sensor - Covered under warranty
Cam Shaft Adjustment - valve and seal replacements - not under powertrain warranty.
Vaccum Throttle value need to be replaced and excess carbon build up removed.

Total cost $1,100.

Can anyone help me out to determine if any of the other parts being replaced are covered under the powertrain warranty.

Thanks

Are you the original owner?

Are you the original owner?

I am the original owner. On the Cam the part number listed are gasket sets. The bill stated that they removed valve cover and replaced cam adjuster seal and valve covers.

I also have a call into the VW advocate line who is going to contact the dealer for specifics. VW is under the assumption that it should have been covered under the powertrain.

Not sure if dealer is being honest. The bill for this was about $550. six hours of labor

First owner the cam adjuster and seals and cam seals are covered to 100k miles.

The o2 sensor is not covered under warranty after 50k.

Whats a vacuum throttle valve? do you mean throttle body?