I would say any "used" unit you buy is going to have a failing Pinion Bearing. I bought a unit off eBay $558 CarPartsInc, Pittsburgh PA the the pinion bearing was failing. I am in the process of rebuilding the unit with new Bearings, Seals. Had to purchase the Pinion Nut Tool off Amazon at...

I measured 326 mm but wasily had 2 mm of error in my measurement, with wheel on

I do confirm the two pot, two piston calipers

Maybe the US market, as we got the 2.5T XC90 in Ocean Race here as well as the XC70.

Neil.