I am at 43,000 miles with my 2009 G37 Sedan (Leasing). Last month it started stalling, bucking. It was scary! I took it in to the infiniti service department and (really I can't remember what they replaced without the workorder). It ran fine until Friday, January 13th. The bucking and stalling was so frightening, I did not want to drive the car anymore. I was lucky to be only a few feet away from my drive way because I had to put it in neutral and it cruise on in. I took the car back to the infiniti service department on Saturday morning and they reprogrammed the ECM. I've been driving it for one day now but I find myself afraid to accelerate once I 've stopped. Not sure I can get back in my comfort zone driving that particular car. Can anyone say that reprogramming the ECM fixes the problem?
