N14 1.6 Pulsar AD18V front brakes
This has to be one of the best bang-for-your-buck upgrades to any micra. The factory front brakes aren't too crash hot, they're designed for mum running down to the shops and back. Enthusiastic micra drivers will discover pretty quickly that you don't have to be racing around Wakefield raceway to get them to fade. Two or three successive hard corners under brakes in a row and they'll start to fade on you. But who cares when a set of chunky ventilated 1.6 pulsar brakes are so cheap? Off you go to the local wreckers then.
From my experience, I would recommend just buying the calipers and sourcing some brand new DBA rotors. Disc rotors from wreckers can quite often be warped and its pretty impossible to tell by picking them up and seeing if they look straight. They'll usually be covered in surface rust aswell. DBA rotors represent excellent value for money, are 100% straight and have a number of other advantages. I ended up spending about the same as a new set of DBA rotors would have cost and then I found that my used discs were warped anyway.