At 280000 Miles, fuel problem. Replace Fuel filter, fuel pump, in tank fuel pump.
Low 200000 miles, electrical problem (not as bad as the 760 series)
Sunroof was stuck closed un-evenly. On both 740 and 760.
I love these Volvos! Owned 3 so far. Still have my 740 with B-230F engine non-turbo as well as 760 Turbo!
B-230 F engine are bullet proof. This engine will go and never stop. It is so bullet proof, when I broke my timing belt, it doesn't have any effect on the engine :) The car continued to run again.
Major headache is the electrical.
Kept getting problem with electrical both on 740 or 760.
These are very reliable car and very comfortable..But just beware of the electrical problem.
The reason the timing belt breaking is because of how the engine is designed, not how tough it is. Timing belt breakage is meant to be non-interfering, so that if it is overlooked during maintenance, it won't cause damage to the engine if it breaks.