I just noticed that my front bakes are dragging - not enough for burnt brake pad smells or warped/discoloured rotors, but the wheel is reluctant to move at all.
Looks like I'm going to go for a rebuild/major clean-up in the near future.
Probably just needs a good cleaning and fresh flush. Nissan 4 pot calipers are very easy to rebuild, I have done a few sets and just reuse the pistons 95% of the time and just order some new seals and pads.
Clean everything really well, then use some synthetic lube on the slide pins and piston to pad contact points on the back of the pads. She will be good to go.