Hello, I just hit 100,000 miles and was wondering what maintenance to perform on my 2009 g37x
sedan?

 

I guess the answer at this point is depends. Do you know what's been done already? Drive belt, Radiator Hoses and Thermostat, Transmission and Diff service, Plugs, throttle body cleaning?

There's a high level guide here: https://infinitig37.com/maint-sched.html

But many of us have already serviced the items listed prior to 100K.

I'm always wondering about the items that are never listed in a service schedule, like the water pump.