Timing belt needed replacing.
Sunroof leaks.
Excellent car, no major mechanical problems in the year that I have owned it.
It could be a little quicker. I recommend the turbo, I've driven both and it helps a lot.
Don't let the high miles scare you, Volvo's really do run forever.
I too own a 1989 wagon with turbo and it is the best car I have ever owned. I recommend the 740 model for anyone, reliable, with the turbo good pick up. and for the squeaky brakes (which most volvos have) get raybestos pads.
Volvo for life.