Two transmissions in 88,000 miles, rear wheel bearing, lots of expensive brake jobs compared to my Chevy Suburban.
Don't get too comfortable if you have a transmission replaced in your XC-90. We had one go out at 62,000 miles 14 months ago, and it just happened again at 88,000. We were told that the warranty is only for 12 months, so we are out of luck. We love the Volvo's, but they are just too expensive to maintain, and will be buying a Chevy or Toyota next time. Too bad they can't step up and fix the problem.
We bought a used 2004 T6 with 42,000 miles. The transmission was replaced at 46,000 miles. It was covered by the warranty and replaced free of charge. At 48,000 miles, the transmission went again as it had a major slip when accelerating. The dealer took the car back and replaced it with a 2005 2.5T as Volvo covered the difference. The dealer admitted there is a problem with the T6 and has since stopped selling them. So far, the 2.5T has been great.