Heavy rear brake wear on Seat Exeo I've done 30,000 miles in my Seat Exeo, but am getting what I consider to be unusual brake wear. The front pads are 20 per cent worn, if that, which I feel is about right for my style of driving, yet the rears need replacing. Seat claims it is normal for the rear brake pads on bigger cars to wear more quickly. Should I press Seat to examine the brakes under warranty? This must be the 1,000th time I've had to repeat this information. Brake discs corrode all the time the vehicle is left standing, particularly in rain or when condensation is heavy. It's worst in the winter. About 95 per cent of a car's braking is done through the front - the rears only come into play to provide balance during heavy braking. Every morning, braking cleans the night's surface corrosion from the front discs but little or none from the rear. Corrosion gradually eats into the rear discs and they become grooved, leading to heavy wear of the pads.