One problem related to engine noise has been reported for the 2004 Infiniti G35. The most recently reported issues are listed below.
Car fire. . My car caught fire while in my office parking lot. I noticed a buzzing noise in my door panel when I rolled my window up. This may be coincidental , 15 minutes later while inside my office I notice my car in flames. The car is a total loss. I had never received any recalls for my car so something is terribly wrong. I was not injured thank god. The fire dep. Said this was the 2nd infinity in 2 weeks they have put out fire on.