When I worked at a shop a while back, I got the professional scoop on how cars are built and how often they break down and why.
General overview:
The US used to make good cars, but now they build them to fail around 80-100k. Toyota and Honda are now the two makes to buy if you want your car to run 200k+
Some cars just suck, always have certain problems, 4runners have this odd MAF thing, always...
But anyway, just to show you that patterns are noticed, on to VW:
While I was there a 2005 jetta had a water pump failure, took a full two days for one of the mechanics to completely disassemble the front of of the car to fix it...and for 10 hour days at 80 and hour (shop charge)...that's a big bill.
One of the first days I was there I worked on a Golf that had a bad fuel pump, it hadn't been done all day because no one wanted to work on it since it was in so often and was considered a cursed car.
I remember two golfs with phantom wiring issues throwing cels for problems or parts that never existed in the first place, lots of cursing.
I got stuck on a lot of VWs because no one wants to do them since they always take longer to repair than the book has listed for the average car (most jobs are under/around book)...
Out of any car that came in, the older mechanics disliked VW the most, because they're always there and aren't built to be worked on.
I had been a huge VW fan until then. They're still okay looking though,