Actually the water pump is an interesting topic all of it's own. I've seen (over the years) loads of threads concerning the leaking plastic thermostat housings, and subsequent revisions never really seemed to cure it. It seems to be the MK7's only real common mechanical issue ?
What's the general view on the units used in MK7.5 performance Golfs, are they the same quality as the earlier MK7's and thus still prone to failure, or are they a better design by now, and less likely to fail ?