Keep front braking firm and responsive with the Carlson Disc Brake Caliper Piston 7122. This front caliper piston is the hydraulic plunger that rides inside the brake caliper bore — when you press the pedal, brake fluid pushes the piston outward to clamp the pad against the rotor, then it retracts as pressure releases. It fits as a direct-fit replacement for the 2003-2005 Infiniti FX35 (All), 2003-2005 Infiniti FX45 (All), and 2003-2012 Nissan Murano (All), with the listed applications calling for two pistons per application.
- Front caliper piston: transfers hydraulic pressure to the brake pad for clamping force at the front axle.
- Direct-fit replacement: designed to install in the caliper bore for the listed applications.
- Application quantity: the listed vehicles use two pistons; order to match your caliper setup.
A pitted, scored, or corroded original piston can cause a spongy pedal, fluid seepage past the seal, uneven pad wear, or a dragging brake. If a worn caliper piston is the cause, replacing it with 7122 helps restore proper piston travel and sealing. Inspect the caliper bore and seals during service, and replace both sides together as a matched pair for balanced braking.
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Frequently Asked Questions
What does this caliper piston do?
It sits in the brake caliper bore and transfers hydraulic pressure from the brake fluid to the pad, pushing the pad against the rotor when you press the pedal and retracting as pressure releases.
Which vehicles does the Carlson 7122 fit?
It is a direct-fit replacement for the 2003-2005 Infiniti FX35 (All), 2003-2005 Infiniti FX45 (All), and 2003-2012 Nissan Murano (All). See the "Vehicles it fits" section to confirm your vehicle.
Is this a front or rear piston?
This is a front disc brake caliper piston for the listed applications.
How many pistons do I need?
The listed applications call for two pistons per application. Confirm the count for your caliper setup and order accordingly.
What are signs my caliper piston needs replacing?
A spongy pedal, fluid seepage past the seal, a dragging or sticking brake, or uneven pad wear can point to a pitted or corroded piston. Diagnose the cause before replacing.
