I have an 03 350z 6MT, the other day i got in the car and tried to go to work and it didnt start, the car didnt even crank nothing. I got the battery checked even though i purchased it at the beginning of summer it ended up being good, next i thought maybe it was the clutch pedal sensor so i bridged the connector and still nothing. Then i went over every single fuse i could find on the car and they were all good. next i went to check the relays and even went to a local 350z parts guy which i managed to purchase a whole IPDM. I swapped over the relays and still nothing, so then i switched over the whole IPDM and nothing. Starter was my next guess so i managed to get the car started by pushing it and dumping the clutch in gear which allowed me to get it to my driveway. Which is where i finally i got some spark. i took a wire connected it to the battery and ran it straight to the starter and the car cranked not problem. So only thing i could come up with was that the starter was not receiving power somewhere and now im lost and ready to give up.

 

Welcome- at least you know the starter is intact and functioning. Have you tried checking and cleaning the battery connections? A buildup of corrosion to the ground cable should also be eliminated.