Perennial brake rotor vibration and replacement.
Cruise control went out at 100K.
Entire new valve job at 120,000, but I think it was the dealer's fault due to faulty timing belt installation.
Radiator thermostat out at 112K.
Minor light/electrical bugaboos.
Sunroof jammed recently.
Then $600 to fix the ignition (car thought it was in park).
Despite all the above I really like this car! It is super comfortable, solid and surprisingly quick especially when you choose sport shift mode, it's just very pleaureable to drive, even around the bends, safe feeling.
I think the valve job was unlucky, the endless rotor replacement is irritating and there is never a satisfactory answer from the dealer. However, it has never let me down starting.
I think I read a solution to this, or at least a way of preventing it. Check the website http://www.kinovolvo.cjb.net
IPD (http://www.ipdusa.com) have replacement rotors for the brakes that may well fix this problem. They are also cheaper than the original rotors.
The problem is not the rotors ITS THE HUB!
A frequent cause of rotors distorting on Volvos is over tightening of the wheel nuts.
Most shops put them on with an air impact wrench with the torque set way too high.
It doesn't take a lot of torque to secure them.
Do it by hand and use a torque wrench to the specification listed in your handbook, you should have no problem with distorted rotors.
The other common cause on any vehicle is repeated heavy braking.