I purchased an 07 infiniti m35x and had several issues with it. the major issue was due to a "dragging, rasp rattling, rocks in a can sound" coming from underneath the car; which i fought with the dealership on for over a year. since then; i worked a deal with the new and current gm on a 09 m35 sport and the same rattling has aroused again; "rocks in a can" sound coming from the car after putting just a couple hundred miles on it. i brought it back to the dealer on july 8th; in which they kept it for 3 days. changed out the installation and heat shields; the problems is still there. there are an abundance of reports on the internet about this; with dealership tech's giving customers different opinions about the issue and even admitting it to be a known problem. the issue gets worst over a period of time and as the system gets hotter and hotter. i'm afraid that at some point with me driving this new vehicle; that something could possibly go wrong while driving on the highway and cause a major accident. vehicle location in the virginia beach area currently. *tr