Typical is easy.
Trade talk information + forum posts on many forums world wide.
Do a search for VW recent car issues.
Here's a few off the top of my head.
Mk5 golfs,
Rust issues, wings, rear door sills, hatch badge hole, front of sills on early cars due production robot gripping it.
Cam issues,
DSG mecatronics unit failures.
1.4 TSI mk5 engine failures see below as well.
TDI mk5 turbo failures.
1.4 TSI polo, fabia, a1, cupra
chain tensioner issues, = new engine
Fueling issues, = new engine.
DSG 7 speed box issues. = new gearbox or mecatronics unit.
Early cars paint issues and panel fit issues.
Mk6 GTI golfs
Chain tensioner issues
Water pump issues
Diverter valve issues
Turbo issues,
Breather pipe issues,
Waste gate issue,
TDI turbo failures.
DSG mecatronic unit failures....
I could go on but I think you may get the point I get to hear about things from people who work in the motor trade...