The brake wear warning light is showing on the dash. Does the Mk1 have the sensor on all four discs, just the front discs, or on just one of the front discs? Also, if the sensor has been triggered does it mean it will also now have to be replaced? Thanks.

On my VRS the front passenger side inner pad has the wear sensor. It's built into the pads - when the pad wears down it makes/breaks a circuit (not sure which) and the light on the dash illuminates. There's no wear sensor on the discs.

 

Sounds like you'll probably need front pads soon. Depending on how worn/pitted/scored/corroded the front discs are it might be worth changing them at the same time. Get the rear ones checked out too.

3 hours ago, mbp said:

just one of the front discs

Just the inside pad on the LHF disc.