Keep the rear brakes clamping smoothly with the Carlson Rear Disc Brake Caliper Piston 7020. This is the piston that rides inside the rear brake caliper bore — hydraulic pressure from the brake system pushes it outward so it presses the brake pad against the rotor, and it retracts slightly when you release the pedal. It installs as a direct-fit replacement for many vehicles, including the 2011-2020 Hyundai Elantra and 2011-2016 Kia Optima.
Rear-specific replacement: cataloged for the rear caliper position on the listed applications.
Mechanical job: transfers hydraulic force to the pad so the caliper can apply and release the rear brake.
Signs it may need replacing: a seized, pitted, or corroded original piston that drags, sticks, or leaks past the seal during a caliper rebuild.
Sold individually: the listed applications use two — replacing both rear caliper pistons together is recommended for even, balanced braking.
Diagnose the cause of any brake concern before replacing, since dragging or uneven braking can also come from the caliper seals, slides, hose, or pads. See the "Vehicles it fits" section for the full list of covered Hyundai and Kia models.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
What does this Carlson 7020 piston do?
It sits inside the rear brake caliper. Hydraulic pressure pushes it out to press the pad against the rotor, then it retracts slightly when you release the pedal.
Is this a front or rear part?
It is cataloged for the rear caliper position on the listed Hyundai and Kia applications.
How many pistons do I need?
It is sold individually. The listed applications use two, so replacing both rear caliper pistons together as a matched set is recommended.
What vehicles does it fit?
It fits many vehicles, including the 2011-2020 Hyundai Elantra and 2011-2016 Kia Optima. See the "Vehicles it fits" section for the full list.
When should I replace the caliper piston?
Consider it during a caliper rebuild if the original is seized, pitted, or corroded and drags or sticks. Diagnose the cause first, since seals, slides, or hoses can cause similar symptoms.
