My wrapsheet - 2000 Jetta 2.0L (suppositely a very reliable motor)...
- 20k = front brake problems, driver side door lock starts acting up (will only lock with key manually), driver side door starts leaking water into cabin in the rain (top of door/window frame starting bending out for some reason?? apparently i read this frequently happens to Audi's and older Porsche's as well)
- 42k = blown cat
- ~50k = valve cover gasket starts spewing oil
- 60k = "plastic propelled" water pump breaks into 3 pieces (put new "metal propelled" water pump in, changed the timing belt, thermostat, serp. belt, etc. - was a pain in the ass)
- 70k = valve cover gasket oil leak starts getting bad so i replace the gasket only to find out the bolts on the valve cover were finger tight (that good 'ol German-engineered / Mexican-assembled combination) also changed spark plugs while i was in there, that was fun - the whole intake manifold had to come off to get to them, spark plug wires broke when i removed them (ceramic coating on the inside?), dealership gave me updated wires with metal coating since they obviously had problems with them
- 85k = tried to do a tranny service on the auto tranny but it's sealed, could have done it myself but looked at the DIY and started getting suicidal, took it to a tranny place they told me only the dealer could do it, took it to the dealer, $365 for new fluids, gasket, etc. - what a deal! also around this time the overhead domelight's switch just fell off... some pieces of copper were floating around up there and shorted the fuse which disable my entire car (had no idea fuse was associated with the alarm, i tried jumping it - i was stumped), so it wouldn't start, locks didn't work...searched VWVortex for a day until i found someone else with the same problem, started pulling fuses and found and replaced it, car started right up
Sorry for the novel, there's way more problems to that car but they're just the major ones on the top of my head.
Consumer Reports gave the MK5's a pretty bad rating if I recall correctly. Good safety ratings but that's about it.