i think i have a bad motor mount. left upper. mostly when car is cold . drive away slow left wheel turned.feels like motor mount is bad. sounds like something touching the frame. you can feel the engine in the frame coming and going.just checking if any body had motor mount problems on a s40.some times driving step on the gas hard it goes away.let off on gas comes back.

 

Not all that uncommon. you can search the board for some other threads with pics.

 

Easy fix for DIY. Get help here:

S40/V50 Technical Information, How-To, DIY, FAQ, and More

 

There are 4 mounts. Two main ones on top, two small ones on bottom.

On my 2001 you could feel the vibration through the brake pedal with the car idling and in gear. I replaced all 4 but after inspection only the bottom 2 were cracked.

Be careful if you change the main mount (right side as you are sitting in drivers seat). Volvo changed the mounting arm too so it's an extra expense. The left side trans mount on mine was perfect and didn't need to be changed.