You don’t mention which model. They all have great seats, durable paint, resist rust, and great safety and construction.
The 5 cylinder turbo engines are reliable and durable. The PCV system is a maintenance item. I’ve done the PCV on each of the cars. It’s a timing belt engine. Timing belt every 90,000 or 105,000 (depending on year). Water pump should be done on the second timing belt. A variety of displacement and turbo options mean they range in power from 168 to 300HP.
2001-2002 5 cylinders had the Aisin Warner AW-55 transmission with bad valve bodies. Early intervention by replacing or rebuilding the valve body gives them a long life. 2003 and up are good.
AWD models have the angle gear, a front differential and known weak spot because they’re not looked after, they only hold 700cc of fluid. A bit of a leak and they burn up. Cared for, with even infrequent fluid changes, they’ll last a long time. A Service bulletin for fixing leaks was issued in 2003. Updated angle gears don’t leak. Mine don’t leak, and I installed a drain plug while they were apart for the resealing work.
2001-2002 AWD models use a viscous clutch in front of the rear differential. It can be burned up by running tires with different tread depth. 2003+ AWD models use a Haldex system with electric pump and clutch. The fluid can, and should, be changed, along with the filter, or you kill the pump. The clutch itself lasts forever. The pump ain’t cheap.
Electronic modules sometime have issues. CEM, or central electronic module controls a lot, and can overheat. XEMODEX can rebuild it and it will be plug and play. DIM or instrument cluster can go out, again, XEMODEX.
The XC-90 is roomy. Lots of cargo space. Ponderous. Heavy. Safe. Slow. Nice driving. Wonderful seats. I’d buy one for my kid or my wife in a heartbeat.
Avoid the 6 and 8 cylinder versions. The transmissions don’t last. It’s a P2 chassis, so the front lower control arm bushings wear out often. IPD makes a HD lower control arm with upgraded bushings.
The V70 is the sweet spot of room, ride, and handling. The XC model is higher ground clearance with a softer ride. Same P2 chassis issues. Same reliable 5 cylinder. Same transmission. The S60 is the same car, same powertrain, everything but the cargo room.
My wife’s 2002 XC70 has about 286,000 miles on it. Original engine, turbo, angle gear and transmission. It’s had two complete suspension rebuilds. Three timing belts. One water pump. Valve body done at 115,000. DIM and CEM done.
The 2.4 base model is a bit slow, with 168 HP, but a good car.
The 2.4T is a bit quicker, with 190 HP, and XC has the 2.4T. (2005 and up are the 2.5T with about 210 HP due to a bump in displacement and VVT on the intake cam).
The T5 model comes with sport seats, a 2.3 turbo with 247 HP, bigger roll bars and larger brakes. The larger brakes are an easy retrofit to 2.4 and 2.4T models requiring only the larger rotors and T5 brake caliper brackets. Later T5 have the VVT on the intake and are a bit over 250 HP.
My 2002 V70 T5 was my daily driver for many years. Quick. Reliable. Lots of room. Great handling. Good MPG. It’s got over 210,000 on it now. It had the Valve body done at 100,000. One suspension rebuild. Two timing belts. One water pump.
My son has a 2001 V70 T5 with IPD cat back and down pipe. He runs it hard. It’s doing very well. Did the timing belt, water pump, and suspension pre-emptively before giving it to him three years ago.
The 2004-2007 R models are somewhat rare and highly desired. 300HP 2.5 turbo with a GM auto transmission or six speed manual. Sport seats. Electronically adjustable suspension. Four piston Brembo brakes. Big rotors. Haldex AWD. Some unique body panels. They’re fun, but rather expensive. Unique parts make them more expensive to maintain.
My 2004 R is, well, just great. Quick. Fun. Room for skis.
hope this helps.