I think your fine for now just tapping up the brake fluid.
Since your at 25k mark have your brakes bleed and change to motul rbf 600.
Thats what I have now never had any issues at all.
With the power steering you can always tapp it with any ATF fluid. I used Castrol Dextron-VI at autozone.
At 30k miles change the transmission and differential fluid with Redline differential fluid.
https://www.z1motorsports.com/g37_37...63fh5afss433f5
https://www.z1motorsports.com/g37_37...63fh5afss433f5