The passenger side on the front end rattles and vibrates really bad.
Heavy vibrations on passenger side of vehicle when driving. on 2002 Volvo S60
It's hard to know exactly what is going on without experiencing this, but my initial thought is the upper strut mount is broken. It's quite common on these Volvos and it's really easy to diagnose. Have a repair shop inspect the vehicle t be sure. Here are some in your area: http://repairpal.com/directory?address=75233&car_brand_names=Volvo