After a long week waiting, I finally went to a friend’s auto repair shop. He scanned the car, and found out that #5 coil is the one giving me headaches… not working?! So, that means, probably, that the other next 5 coils are in the final chapters of their purpose in life $$$.
Where can I buy Nissan electric parts without paying a lot?

Sedan G35 2003

 

Easy question to answer....Riverside Infiniti 1-800-919-8130 ask for Tony or
Mike These guys give Driver members a major discount compared to the
other stealerships!
Gary

 

Plasma Direct has some replacement coils, but I don't know how they compare to OEM in terms of price. I have a set and they work quite well.

 

Where can I find those Plasma Direct?

 

Be careful many aftermarket copies may be rejects or not tested in compliance to oem standards [life up to warranty and beyond].

 

So, what is your recommendation?

 

Plasma Direct coils are superior to OEM. Check out the specs at http://www.okadaprojects.com/usa/products_direct.htm. If you are having to replace them, I would say the OEM ones do not support "life up to warranty and beyond". I have had mine for two years so far - no issues.
EDIT: Fixed the link...

 

Mother of GOD!! $995.00 each coil? Thats roughly $6,000.00 for the whole set!?!?
Anyway, the G35, I35, FX35 and Nissan 350Z, all share the same coil, right?

 

A Google search on ignition coils turned many coil pack options for Nissan [Infiniti] 3.5 engines.* Speedy Auto Parts turned up coils way less expensive than NOS.* Another option Stillen or other performance suppliers.

 

no, that's for the whole set, not each coil