My 2005 S40 was in a front end collision. After getting the car repaired I noticed a vibration while driving. This was new and not there prior to the accident. I had all of the suspension components checked, alignment, tires, rims, you name it. It all came up normal. The car has about 78K miles on it so it was determined that the engine mounts were a bit sloppy those were replaced. Now the car vibrates in a different way, feels more like a rough idle. Plus when I am driving, the overall vibration felt throughout the car is still there. Getting the new motor mounts made everything actually a bit worse overall. Does anyone know if motor mounts can be installed incorrectly or can be adjusted? Any clue as to what the driving vibration could be related to?

I seem to be going in the wrong direction in getting this problem diagnosed and fixed.

 

Flat spotted tires can do that. They get worse the more you drive it. Did your car skid at all?

 

It's possible. I did have the tires checked out first, they told me they were fine. It was a pretty minor accident according to the body shop. How can I check for flat spots myself?

 

If it was minor then it's probably something else. Are you missing any of the lead weights that are used to balance the tires? I've thrown them off before under normal driving.