So apparently the 350z doesn't have a sensor light for low brake pads. Mine had been a bit squeaky for a while but I wasn't overly worried as no warning light (I know now!). Then the inevitable metal on metal noise started, so it was off to TGM Sport for a full set of Brembo discs and pads. I went for sport ones on the front as Tom at TGM was able to get a good deal on them. No more noisy brakes and confidence in my stopping power!