RepairPal Certified shops can diagnose and repair your 2003 INFINITI I35. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
My initial impression is that the battery is not strong enough to provide enough power to crank the engine over. Have the battery checked for state of charge and the ability to sustain a load.
If the battery is good, then connections of cables should be checked next - it sounds like insufficient power.
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