Thats funny Tommo didn't really find/hear of any reliability issues, I think the 2.0 T4 was a bit more reliable than the 1.9 T4, the engines meant to be a bit stronger. I think the only well known issue is the fuel pump but that tends to be around the 100k mark, and mines only on 67k so should be good for while longer. To be honest I love the car its very fast for a big car (7secs to 60) and its very torque which makes it very easy and enjoyable to drive. I wanted sleeper but I like the new wheels so had to be done ;-). I can highly reccommend the T4 best car I've owned, having said that looking forward to next year when hopefully I can get an almera GTi as a weekend/fun car.
I had a boost guage to go in Garry but the guy at the local garage I went to said that the diesel wouldn't boost enough to register on the guage, & I didn't know any different :-(, Its definately A bit softer on the old back than the Almera was expecially when it was lowered, think I probably would have kept it longer if I hadn't done the lowering although it made the handling a lot better