I've been experiencing a front end rattle/clacking noise when going over slight breaks in the pavement. I think I found the culprit yesterday as I was replacing the front brakes......it appears that the right side upper strut mount/spring isolator is broken. I can wiggle the spring quite easily. Time for new front strut/spring assemblies, eh?

 

http://www.carparts.com/results/?Ntt=+W0133-1657762



Part number is W0133-1657762

If that link doesn't do it's stuff.