Ford Focus Mk3 ST Rear Brake Disc Set Perforated BV61-2A315-BA

Visual condition of the part

The product shows signs of use visible in the photos. Ford Focus Mk3 ST Rear Brake Disc Set Perforated is an original set from the Brake discs group, designed specifically for the rear axle of the sporty ST version. The perforated design promotes stable heat and gas dissipation, which improves braking efficiency during dynamic driving and increases the consistency of the braking system's performance.

Specifications and technical data

• SKU: 1704765
• Mark: Ford
• Condition: Used
• OEM Part Number: 1704765
• Substitutable numbers: BV61-2A315-BA, BV612A315BA, 1704765, 55390
• Location on the vehicle: Rear
• Part type: Brake Disc Rotor
• Category: Brake Disc Rotors

Purpose and fitment for Ford Focus Mk3 ST

The presented set of rear brake discs has been developed as a component of the braking system dedicated to the ST version of the third-generation Focus. This ensures proper fitment to the calipers, hubs, and suspension geometry, as well as maintaining the factory operating parameters of the brake assist systems. Thanks to the use of an original design solution, installation is predictable, without the need to modify mating components. This is a beneficial solution for users expecting consistency with factory braking characteristics and for workshops that want to reduce the time required for replacement.

Construction of the perforated rear discs

A key feature of the set is the perforated working surface, which supports the dissipation of gases and dust generated during intensive braking. This type of construction helps maintain stable friction between the pad and the disc, which is particularly important in high-performance cars such as the Focus ST. The arrangement of the holes in the disc is significant for even temperature distribution and limiting the phenomenon of surface overheating. In practice, this translates into a more predictable brake pedal response and better resistance to performance fade during repeated, heavy braking.

Operating characteristics on the rear axle

As a component mounted on the rear axle, the set of perforated discs is responsible for vehicle stabilization during braking, working in conjunction with the vehicle's electronic systems. Properly selected friction characteristics for the rear axle help maintain the correct balance of braking force between the front and rear, which is important for both safety and the durability of the entire system. Perforation also promotes more even wear of the working surface, which can help maintain predictable vehicle behavior over a longer period of operation, provided that proper maintenance and the selection of compatible brake pads are observed.

Benefits of choosing original used components

Using original, used braking system components allows for a combination of cost control and the preservation of factory technical specifications. For many Focus ST users, this is a reasonable compromise between price and performance, especially in the case of components with precisely selected geometry and friction characteristics. If you want to better understand how to safely use recycled parts in a braking system and how to assess their suitability, it is worth reading the guide: Brake calipers under the microscope: how to reduce braking system repair costs using proven used parts. The article discusses practical selection criteria and safety issues when using original dismantled components.

Support for Ford braking system upgrades

If you are planning a comprehensive repair or upgrade of the braking zone in your Ford and need other components from the same group, such as additional discs, compatible pads, or supplementary lines, check the available parts in the Ford brake discs category. For more extensive repairs, especially after collisions, a practical guide on the economical rebuilding of a vehicle using original recycled parts may also be helpful: repairing a car after a collision using original OEM parts. It makes it easier to plan the scope of work and select appropriate components from a technical and budgetary perspective.