Not sure if its my rear shocks/struts(original, r53 bought new in 2005) or its my wider set wheels(215/50 16) but I've been noticing a knock sound from my rear when I hit bumps in the road going at higher speeds with either heavier items in the trunk or a passenger/with passengers. Don't know if its a rubbing sound or its the shocks. I do have a rear sway installed also.

Anyone else have this issue or help me diagnose?

 

Check the fender liners to see if there are abrasions from the tires. I run 215/45x17 and they occasionally rub the liners. Also, your struts are 15 years old and it's way past time to replace them.

 

Yeah I'm thinking of buying some coilovers. Those have both shocks and struts right? I never got learned too much on the suspension, just always was solid to me.