Carlson Disc Brake Caliper Piston P/N:7739

Move the brake pad against the rotor with the Carlson Disc Brake Caliper Piston 7739. This piston seats inside the disc brake caliper bore, where it transfers hydraulic brake-fluid pressure to the pad. It's cataloged as a direct-fit replacement for the listed front and rear disc brake caliper applications, covering a range of 1968-1980 Mercedes-Benz models and 1979-1993 Volvo models — see the Buyer's Guide tab for the full list.

• Hydraulic actuation: when you press the brake pedal, fluid pressure drives the piston outward so the pad clamps against the rotor.
• Front and rear: cataloged for both the front and rear disc brake caliper positions on the listed vehicles.
• Application quantity: the listed applications use two pistons per vehicle; order the quantity your calipers require.

Signs this piston may need replacing include fluid seepage at the caliper, a sticking or seized piston, or uneven pad wear. Diagnose the cause before replacing, and renew the piston seal and dust boot as directed by the service procedure. If a corroded or stuck original piston is the cause of your braking issue, this replaces it. Manufacturer part number 7739.