I have really enjoyed the TDIs. My wife bought the first one and I would occasionally drive it to work. If fact, I enjoyed it so much that I bought another one within 6 months. I had my TDI chipped using the UpSolute solution and the performance increase was outstanding. Even after installing the chip, I still average about 50 MPG while driving with the AC on at 80 MPH. I have also occasionally run BioDiesel in the TDI and milage and power stayed the same. I bought the TDIs for their motor, not for any great love of VolksWagon. The TDI also suffers from Mass Air Flow (MAF) failures, much like I have been reading about here in these forums.

My TDI is at 54,000 and I just got my first Check Engine Light (CEL). I suspect it is probably MAF related. Cannot be sure until I take it in for service. I have also had a problem with the power window closing and then reopening when it gets to the top. It has been in the VW dealer's shop several times. They replaced a bunch of stuff, but never got it consistantly working. I just live with it.

My wife's TDI has had no mechanical issues either, but both of her power windows have come off the track and had to be take in for repair. Both times the dealer covered the repair cost and parts, but only after I made a big stink.