SOURCE: 2003 Infiniti G35 Starter location
Downloaded a PDF detailed service manual online. Gives you diagram and everything else you need.
SOURCE: My 03 G35 is overheating and no heat in the cabin
No heat inside the cabin is a clear sign of a heater core obstruction.
The heater core sits near the A/C blower and flows hot radiator fluid through it to warm the air when the interior thermostat (temperature selector) is set to a temperature higher than ambient.
The inexpensive solution is to get a radiator flush and hope that the heater core unblocks itself. This could also be resolved if there is a large air bubble in the heater core preventing the proper flow of fluid.
The more expensive solution, is to have the dealership or other mechanic, pull the heater core to see what's causing the blockage.
I would try the less expensive method first and make sure that the shop you take it to knows how to remove air from the radiator/heater core (this is usually done by flowing new fluid into the system while pulling out the old).
Hello,
Most likely this is the sending unit which you would have to remove your gas tank to replace. It's actually a common problem with these cars.
I found a good thread regarding this issue on some forums located here:
http://www.6mt.net/forum/g35-coupe/31981-g35-fuel-gauge-issues.html
I hope this helps at least guide you in the right direction and save you some money at the same time.
I wish I could be of more assistance, but most likely it's the sending unit like I had mentioned above which would need replaced if it is indeed a faulty sending unit that's causing the issue (From research I've done and having a friend with the same car and same problem, it IS most likely the sending unit, but there are other things that could be causing it as well).
I hope this helps! Best of luck to you and your G35! Beautiful cars! It's a shame for them to have such an annoying issue. It may actually be a factory recall or covered by some type of factory warranty. You may want to call a dealer and inquire a bit.
Take care,
James Trageser
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