Two problems related to engine have been reported for the 2003 Infiniti M45. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Infiniti M45 based on all problems reported for the 2003 M45.
Vehicle consumes 1 quart of motor oil every 1000 miles. It causes carbon buildup in the combustion chambers. I was told I would have to pay to get the carbon cleaned periodically. Vehicle has 24000 miles and is still under warranty. Manufacturer says this type of consumption is normal and does not want to anything. Service rep stated that they are having the same issues with all models with this v8.
The contact owns a 2003 Infiniti M45. On approximately nine occasions, the vehicle would completely shut off and sometimes would not restart. The vehicle had to be towed to the dealer approximately four times. They stated that the failure could be caused by the shift lock or the fuel system, but there was no resolution. The current mileage was 50,300 and failure mileage was 5,000.