Clanking when pressed side ways.
 

The rear passenger tire area on my s40 clanks and makes loose metal noises when hitting bumps.

When I bounce the rear end it does not make noise, when I press it back and forth (sideways) it makes the clanking. I just cannot get under the car all the way and create the noise at the sometime.

Has anyone had this issue? And fixed it.

Thanks for reading.