The Acura TL A1-CarDone calipers operates just like a small hydraulic clamp designed with  pads on each side to grip the rotor and brings your car to a stop. The calipers are a clamping device with a piston or pistons on one or both sides of the clamp. The brake pads ride on the out side of the  calipers pistons, and the rotor spins in the middle of the calipers. When you push your Acura TL's brake pedal, high-pressure fluid is directed from the master cylinder down to the brake calipers where it pushes the piston or pistons in-ward. The piston  action moves the pads against the spinning brake rotor, and the friction stops your Acura. Since the brake calipers are fixed to your Acura's front suspension and the rotor is attached to the wheel hub your car starts to slow down and stop. Much of the heat energy is dissipated by the rotors and pads (which is why they are replaced the most), The pulling and twisting forces the brake calipers has to endure requires that it be extremely strong. If your brake fluid isn't changed often enough, moisture in the fluid and the extreme heat of the brake fluid will begin to pit and rust out the inside of your brake calipers,causing the O rings to leak resulting in brake fluid loss and your Acura pulling to one side when you apply your brakes. The problem is, you may not even realize when you have a bad brake caliper if you're not paying attention to how your car drives. So make sure you're attuned to any pulling, squealing, or leaks that may come from a bad brake caliper.   Eventually the brake calipers will cease to function altogether, significantly diminishing your Acura's stopping ability.  If and when you find a problem, replace the brake calipers immediately with a high-quality new Acura TL A1-CarDone brake calipers.

• If your brake fluid isn't changed often enough, moisture will get in the fluid .