Are there any notes about the cost of changing the belt, part number, labor time, who did the work, etc....?

Serpentine(accessory) belts are usually changed for free or very little cost.

Timing belts usually cost upwards of $100 to change.

The timing belt on your S90 has a 70,000 mile recommended change interval. That being said, the previous owner of our 95 960 had it changed the first time at 89,000 miles.

If the work was done at a dealer or independent shop they might have records that will help you determine which belt it actually was.

If you can't determine which belt was changed, then common sense and safety would say to change the timing belt. You can't afford to have this one break.

DEWFPO
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1998 S90 064,250 and 1995 964 148,450