One problem related to engine belts and pulleys has been reported for the 2003 Infiniti G35. The most recently reported issues are listed below.
I've recently been having issue with the engine where the car stalls. The car start fine when I do a cold start but when the car warms up the car stalls at times. I've been hearing a lot of the stories from other people on different forums where this is a common issue for this model. The culprit are either the trottle body which I had already replace three years back, the 2 cam position sensors and crank position sensor. I recently found out that there is a recall on the cam position sensors and crank position sensor. I'm hoping that that my VIN# is part of that recall. The second issue I have been having with this car is the radio and temperature control. That I recently had changed with the factory radio attached to the temperature control. The radio would stop working. I have no control over the temperature control and the ac unit would turn on by it self. I recently just installed an after market radio. With everything after buying what was required to do a double din conversion and installation. It cost me a good amount of money. Another issue this car has is the seat belt issue. It doesn't retract properly and the passenger side it's a chore just trying to put on the seat belt.