I have a 98 S90 with just under 70,000 miles and there have been no significant repairs/problems with it. The PNP sensor went out at about 67,000 miles. I do most all my own work so they are fixable by the shadetree mechanic. I do maintain it properly and only use OE Volvo parts.

The 95 960 we have on the otherhand is another story. We bought it used with 109,000 miles on it and it was apparently not treated very kindly by the previous owner (other than consistent 5k oil changes). The car currently has just under 153,000 miles on it and still is a blast to drive and gets great mileage on the highway. But it's been a learning experience for me.

DEWFPO
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1998 S90 068,300 and 1995 964 152,300