I recently got an 09 g37x sedan. So far, I have changed the battery and I have changed the oil. What other maintnance do I need to do to it before moving on to performance mods? Im planning on checking all of the fluids as soon as I get the chance. Im also planning on replacing the breaks, wheels, and tires because the car has 93k miles on it.

 

Welcome- the last major service on your G was at 60K. Did it come with a service history?

 

Driveline fluids (front and rear differential, transfer case), and transmission fluid would be on my to do list. Coolant is due as well - I believe it should be changed every 10 years or 100k miles; whichever comes first. Brake fluid should also be completed if it hasn't been done recently and never hurts to do power steering fluid as well; especially given how easy it is.

 

At 93K miles, the other items to consider are air filters for engine and cabin, along with new NGK spark plugs. I recommend the new Ruthenium coated plugs that supersede the older NGK Irridium ones.