Camshaft-driven vacuum pump for brake booster was leaking engine oil onto the transmission. Shaft seal had failed. Apparently common on this engine. Took the dealer 3 tries, but finally repaired under compulsory used car warranty.
See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how
frequently 2009 Volvo V70 problems occur, check out our car reliability stats.