The rear brake pad change service notification has been on for a while. The car has just had an MOT and no advisory re brake pads, so I think this means more than 3mm left on them. So they do not need replacing. My car now has the brake light illuminated and keeps telling me to service the brake pads, overdue by 12 miles. Do I need to change the brake pads as they are perfectly fine according to MOT? Thank you