Deliver steady hydraulic clamping force to your front brake pads with the Carlson Brake Caliper Piston (P/N 7161), the piston that rides inside your front brake caliper. It fits the front calipers on many vehicles, among them the 2009-2016 BMW Z4, 2007-2013 BMW 335i and 2007-2013 Mazda 3. When you press the pedal, pressurized brake fluid drives this piston outward to squeeze the pads against the rotor — a corroded, scored, or seized piston can drag, apply unevenly, or leak past its seal. This is a front-position replacement, and each listed application uses two pistons.
What it does:
Signs this piston may need replacing: a piston that won't retract, brake drag, uneven pad wear, or fluid seepage past the piston seal. Diagnose the cause before replacing, as these symptoms can have other sources.
See the Buyer's Guide tab for the complete list of vehicles this piston fits.
What does a disc brake caliper piston like the Carlson 7161 do?
It's the piston inside the front brake caliper. Brake-fluid pressure drives it outward to press the pads against the rotor, applying braking force when you hit the pedal.
Is this a front or rear part?
This is a front-position caliper piston, cataloged for the front brake calipers on the listed applications.
How many do I need?
It's sold individually, and each listed application uses two. Replacing both together is recommended for balanced front braking.
What are the signs of a failing caliper piston?
A piston that won't retract, brake drag, uneven pad wear, or brake fluid leaking past the piston seal. Diagnose the cause before replacing, as these can have other sources.
Does P/N 7161 fit my vehicle?
It fits front calipers on many Audi, BMW, Mazda, Saab, Volkswagen and Volvo models. Check the Buyer's Guide tab for the full list by year.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
