Auto Repair Encyclopedia
Brake Pads Replacement |
Sometimes referred to as Brake, Brakes, Pads, Pad
Brake pads are located in the brake calipers at each wheel. Each time the brakes are applied, brake pad material wears down.
As the brakes are applied, brake pads come into contact with the brake rotor to slow the vehicle down. The brake rotor (or disc) is comparable to the rim of a bicycle tire. And as with a bicycle, the harder the brakes are applied, the quicker the vehicle stops.
Brake pad material wears out over time. Brake pads should be periodically inspected for wear, which is highly variable and depends on vehicle weight and driver habits. Brake pads must be replaced before the friction material is worn away completely. If it isn't, metal-to-metal contact will occur between the brake rotor and the worn-out brake pad. If metal-to-metal contact occurs, the brake rotor will be damaged. It will then need to be resurfaced or replaced.
To replace the brake pads, the wheel is removed to gain access to the brake calipers. The brake pads are withdrawn from the brake calipers, and the calipers, brake hardware, and brake rotors are inspected for damage and wear.
About this Repair: Brake Pad(s) Replacement
Recommendations
The brake rotors should be inspected when the pads are replaced, and may need to be replaced or resurfaced.
Shops will often refer to brake pad wear as a percentage of material remaining. Ask the shop to be specific about how much of the pad is remaining. We recommend that brake pads are replaced when there is 20% or less material remaining.
We recommend braking gently for the first 40 to 50 miles of driving on new pads. This will allow them to adjust to the rotors and may help prevent squeaking.
Why this happens
Worn brake pads often result in a loud squeaking or grinding noise while driving, especially at low speeds. Replacing your brake pads early may prevent the brake rotors from being worn or damaged beyond repair.
Brake pads will wear out more quickly as they age. The second half of a brake pad will wear away more quickly than the first.
