Post YOUR G35s mileage thread!
stuff that went bad due to hardware failure:
exploded 4 transmissions changed O2 sensors, crankshaft sensor, camshaft sensors, a/c fan motor, at 220k somehow the crank became loose and managed to FLY OUT of place
.... motor mounts, I packed the transmission mount with McMaster .60A urethane. Reasons for failures:
Transmissions: Overheating, lack of proper cooling due to intense driving.
o2 sensors = motor mounts failed, caused Catalytics to fail thus causing chunks of **** to damage them.
sensors = wear n tear
a/c fan motor = wear n tear
Crank =
best GUESS is the oil i was using was too thick (15-50 Valvoline VR1) causing oil pressure problems I haven't ripped the engine apart to know the facts so I am speculating.Fixes:
Transmission(s) = Installed Transmission Cooler (somewhat large 8x10x1/2inch) This transmission has survived through countless track days, and 110k+ miles with no signs of foreseeable failures. Other transmissions have failed nearing 20k miles.
The rest of the fixes are just self explanatory.
I replaced the engine with a 2006... The differences are simply sensors... you have to use your 2003 sensors and engine wiring harness and it's plug and play.
So far I am up to 260,591 Miles. I think at this pace I should be up to 500k by 2015
Registered User
Joined: Sep 2012
Posts: 136
Likes: 15
From: BROOKLYN!!!!
2004 Obsidian Black 6M/T Sedan 137,426 and going 
I had timing issues, which was fixed
Still have oil burning
Need to:
- change valve cover
- replace wires & plugs
- upgrade clutch & flywheel
- fix or change mid-pipe(leak)
- change lower control arm bushings
I had timing issues, which was fixed
Still have oil burning
Need to:
- change valve cover
- replace wires & plugs
- upgrade clutch & flywheel
- fix or change mid-pipe(leak)
- change lower control arm bushings
Registered User
Joined: Jan 2013
Posts: 22
Likes: 0
From: Frederick, MD
2004 G35 Sedan 114K miles.
some quirky engine problems, body still in good shape, no rust.
interior showing some wear on the leather but still in good shape. no rattles or looseness.
Need my 120K maintenance soon.
some quirky engine problems, body still in good shape, no rust.
interior showing some wear on the leather but still in good shape. no rattles or looseness.
Need my 120K maintenance soon.
Dang, some low mileage G's on here. I just rolled over 77K. I've put more miles on mine in the last 6 months than I did in the previous year. Moving to a big city isn't all it's cracked up to be.
