The upper engine mount may wear prematurely. Symptoms may include a harsh feeling when the transmission is shifting and roughness when the engine is idling. Worn engine mounts should be replaced as necessary.Google+
Car Problem Reports
Volvo S60 Upper Engine Mount May Wear Prematurely
Volvo S60 Problem
Drive Trains Affected: FWD, w/o AWD
Visitor, 2005 Volvo S60, w/o AWD, 75,000 mi
The car drove fine in the morning. At the end of the work day, I cranked it, it was fine for about a minute, and then the idling became progressively rougher. I thought the car would stall, but it did not. It was idling so rough that I was concerned that I would damage the car. We took it to the mechanic who diagnosed worn upper engine mounts. They were replaced, and problem fixed!