I was driving my 2007 Mustang GT to town today and I started hearing a loud metallic/rattling sound. Really bad noise. So I took my car to my mechanic and it was determined that the noise is coming from the rear left shock area. They are the Koni Sport 8241 1240 Sport. We removed the shock and I drove the car a short ways and no more metallic rattling sound. I drove the car home without the shock installed (3 miles and the noise was gone. But these shocks are only 4-1/2 years old and I only drive the car approximately 4000 miles per year. So by removing the Koni and not hearing the bad noise can we determine its the shock? This is a gas shock. If anyone can tell me how to check the shock please do so. But like I said that once we removed it the noise went away.

 

Is there a charge in the shock yet ? Does it rattle at all when you compress and release it ?

Could it have been a loose mounting bolt, or a worn/missing top bushing?

 

reinstalled the koni shock and the noise has seemed to disappear. maybe it was loose like you suggested.

 

Good to hear, I've never heard a shock with an internal rattle, at least one that was still in one piece lol.