How often should you change rear brake pads?

There really is no set time or even mileage. If good quality brake pads and s hoes are fitted, they will last a long time. Most disc brake pads have 'squealer' plates, these are thin tin plates that screech when your pads need to be replaced. I like to keep a good eye on all essential features of my car, so I take off the wheels and check my pads and shoes at least twice a year.