for anyone interested -
not just VAG, but all euro makes that are using the GT15, GT17 VNT turbo's seem to be having a few more failures than we might expect. VNT's are still in early life in terms of production units compared with the olden times sleeve bearing wastegated turbo's and sorting out just how best to look after them (with engine management) over the long term is something that only comes from extensive experience. Also, VNT's provide a new set of rules - generally the VNT's work a lot harder than wastegated turbo's, because the're so good at what they are supposed to do (make boost). i think its fair to say a VNT fitted to a modern diesel vehicle will generally speaking have a hard life.
better reliability will come with time. but hey, you guys bought brand new european vehicles with latest technology - this is the price you pay
(same goes for my theory with electronic goods - never buy something top of the line and newly released, because you'll end up paying too much for something that will break down )
'07 Touareg V6 TDI with air suspension
'98 Mk3 Cabriolet 2.0 8V
'99 A4 Quattro 1.8T
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