2001 - 2003 Mercury Sable Organic Brake Pads - Rear (4-Pad Set) (part#ENAD 610)

A:

They snap into the notch. Usually the pads come with them already in place. Even the economy ones come with the springs so there's no need to reuse the old ones from the pads you're replacing. The economy ones don't come with the shims which you can easily reuse from the old ones.

Be careful when installing the pads that the springs are placed correctly. They rest against the inside of the caliper. They sometimes poke through the slot on the back of the caliper as you slide the caliper back in place. You have to make sure they don't do that. They have to straddle that slot and each end of the spring must be resting against the inside of the caliper.

Also be aware that all rear disc brakes work differently than front disc brakes. The brake piston can't simply be pressed straight back into the piston bore. It must be rotated in. Sometimes you can use a pliers on the exposed part of the piston, but in this case you must borrow the special tool to rotate and press it in simultaneously.