My 740 failed the MoT test on corroded front discs. I didn't think
they looked too bad until I took one off. The outer side isn't too bad
but the inner has a lot of rust and the shiny part of the disc is about
half the width. The pad seems to have worn top and bottom and only
really contacting in the middle. I've never seen this before.
Here's some pics... (just click on the picture)