Brake Caliper
The brake caliper holds the brake pads and squeezes them against the disc when you brake.
What is Brake Caliper?
Floating calipers have pistons on one side and slide on pins; fixed calipers have pistons on both sides. Many rear calipers include the parking brake mechanism. Guide pins need clean grease to move freely; rubber boots keep dirt out of the pistons.
How it works
Hydraulic pressure pushes the pistons out, pressing the pads onto the rotating disc.
Why it matters for your car
A sticking caliper can make the car pull, overheat a wheel and wear pads unevenly. Caliper repair kits with new seals exist for many calipers, but replacement calipers are common.
Other terms
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