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    Piston, brake caliper

    Product number: D025122
    ART: D025122 / EAN: 8430320074368

    AUTOFREN SEINSA
    Advised products
    Price incl. vat.
    € 8,66
    Add to cart
    Leverdatum: 29-05-2026

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    Manufacturer Model Version Engine code Construction type Construction start Construction end Pk Power kw
    FORD FORD
    JAGUAR JAGUAR
    RENAULT RENAULT
    Manufacturer Productnumber
    FORD 1121821
    FORD 1121822
    FORD 1121850
    FORD 1121851
    FORD 1126721
    FORD 1126962
    FORD 1130121
    FORD 1133215
    FORD 1133216
    FORD 1144076
    FORD 1144077
    FORD 1144078
    FORD 1144079
    FORD 1478338
    FORD 1478340
    FORD 1478420
    FORD 1478421
    FORD 1522074
    FORD 1522075
    FORD 1522076
    FORD 1522077
    FORD 1S71 2552 BC , 1S712552BC
    FORD 1S71 2552 BE , 1S712552BE
    FORD 1S71 2553 BE , 1S712553BE
    FORD 1S712253AE
    FORD 1S712552AA
    FORD 1S712552AE
    FORD 1S712552AF
    FORD 1S712552BC
    FORD 1S712552BE
    FORD 1S712552BF
    FORD 1S712553AA
    FORD 1S712553AE
    FORD 1S712553AF
    FORD 1S712553BC
    FORD 1S712553BE
    FORD 1S712553BF
    FORD RM1S7J2552AC
    FORD RM1S7J2552BC
    FORD RM1S7J2553AC
    FORD RM1S7J2553BC
    FORD RM4S712552BB
    JAGUAR C2S18003
    JAGUAR C2S18004
    JAGUAR C2S43448
    JAGUAR C2S43449
    RENAULT 7701207477
    RENAULT 7701207478
    RENAULT 8252972
    RENAULT 8252973
    Usage numbers
    Piston, brake caliper

    The Piston, brake caliper (D025122) applies hydraulic force to the brake pads, ensuring strong and reliable braking performance. Replacing a worn piston restores smooth caliper function and consistent stopping power. Use Porza’s smart search to find the correct piston.

    FAQ

    A brake caliper piston is a cylindrical component inside the brake caliper that converts hydraulic pressure into mechanical force. When the brake pedal is pressed, brake fluid pushes the piston outward, pressing the brake pads against the disc to create friction and slow the vehicle. The piston then retracts slightly after braking to maintain proper clearance between the pads and the disc.

    Key specifications include piston diameter, height, material type, and surface finish. Pistons are commonly made from steel, aluminum, or phenolic (composite) materials. Steel pistons offer strength, while phenolic pistons provide better heat insulation. Surface treatments such as chrome plating or anodizing improve corrosion resistance and reduce friction. The piston must withstand high temperatures (often exceeding 200°C) and hydraulic pressure while maintaining dimensional stability.

    Replacement is necessary when the piston is corroded, pitted, seized, or causing brake fluid leaks. Symptoms include uneven braking, sticking calipers, or reduced braking performance. Pistons are often replaced during caliper overhaul along with seals and dust boots to restore proper function.

    Porza offers a fit guarantee option where your vehicle details, such as license plate or VIN, are checked against product specifications. This ensures the piston matches the exact diameter and design required for your brake caliper, minimizing the risk of incorrect fitment.

    Porza supplies high-quality brake components with fast delivery across Europe. Customers can order online or choose in-store pickup in the Netherlands, Germany, or Belgium. This allows quick access to essential parts for both professional workshops and individual users, with reliable availability and service.

    If you select the fit guarantee, Porza verifies compatibility before shipment. If the product does not fit or meet expectations, it can be returned according to the return policy. This ensures a secure and risk-free purchasing experience.

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    Straelseweg 52, 5911 CR
    Venlo
    The Netherlands

    Willem de Rijkelaan 15a, 5616 HH
    Eindhoven
    The Netherlands

    info@porza.nl
    085 401 1901
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