There have been regular failures of minor things -- windshield has stress crack, interior power plug (lighter) sockets have collapsed, rear window trim has popped off several times.
Engine mounts have been replaced.
Just today replaced front brake rotors. That's all smaller stuff.
The bigger stuff has been staggering. Second timing chain failed at 100,000 miles, and more recently the head gasket failed. Those were each $4000 disasters.
Dealer replaced interior sensor and other components of A/C system at a cost of $800, and gave the car back to me still blowing hot air!
A very costly car to maintain. I have lost confidence in the brand, and regrettably the dealer's ability to correctly diagnose and fix problems.
Will feed it money for at least another winter, because it is a terrific snow and ice car. Next year another car, but not a Volvo.
I don't now if you are aware, but it has 185,000 miles. You will get problems at this mileage - just wear and tear!
Timing chain? These use a timing belt and if the belt fails just like on ANY interference engine, the cost of repairs will be very high.