Ok this is probably a stupid question but Ive noticed that on bumps there is a decent rattle sound coming from the front drivers side. I was thinking maybe a bad strut, but there is no excess hop and car still rides perfect. Any ideas?

 

Check the sway bar end link. If it is loose or worn it will knock a bit over bumps.

 

the sub frame can bounce around
IPD has some sub frame O-rings that rid the problem

 

What happens if you dont fix it?

I have a clanging and rattling sound from the front also.