One problem related to engine exhaust system has been reported for the 2003 Infiniti I35. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Infiniti I35 based on all problems reported for the 2003 I35.
Replaced complete exhaust system, all O2 sensors, both cam sensors, fuel pump with strainer, fuel pump relay, spark plugs and coils, fuel regulator, had key programmed, key antenna replaced, vehicle fails to start.