Ford Transit Custom Brake Fluid Reservoir 2.0 EcoBlue Diesel MK8 BK21-2K478-BA

Ford Transit Custom Brake Fluid Reservoir 2.0 EcoBlue Diesel is an original brake system component designed for MK8 generation Transit Custom models with a diesel engine. Thanks to its factory-fit design, it ensures stable fluid supply to the brake system and proper integration with other components, which translates into predictable brake performance and driving safety.

Specifications and technical data

• SKU: RHD-BK21-2K478-BA
• Mark: Ford
• Condition: Used
• OEM Part Number: BK21-2K478-BA
• Substitutable numbers: BK21-2K478-BA, BK212K478BA
• Fuel type: Diesel
• Category: Reservoirs & Caps

Purpose and function in the brake system

The presented reservoir is part of the Brake fluid reservoirs and caps group, responsible for storing the fluid and ensuring its stable flow to the master cylinder. The design, tailored to the 2.0 EcoBlue diesel unit in the Ford Transit Custom MK8, ensures proper venting, fluid level monitoring, and compatibility with factory equipment.

A properly selected reservoir minimizes the risk of air entering the system, facilitates maintenance (checking and topping up fluid), and helps maintain constant operating pressure. This is particularly important in commercial vehicles, where the brake system operates under variable loads and in diverse operating conditions.

Benefits of using an original Ford component

Using an original brake fluid reservoir dedicated to the Ford Transit Custom allows for maintaining the factory operating parameters of the system. Key advantages include:

• secure fitment to the master cylinder and lines,
• preservation of the correct mounting geometry in the engine bay,
• proper cooperation with the fluid level sensor (if present in the vehicle configuration),
• maintenance of the reservoir capacity specified by the manufacturer.

As a result, the brake system maintains stable operating parameters, and the risk of leaks resulting from ill-fitting aftermarket replacements is limited.

Product characteristics and condition

The offered brake fluid reservoir is a used part, sourced from the dismantling of a Ford vehicle. Such a component, provided it is airtight and the body is undamaged, can be successfully reused, offering an economical solution while maintaining the original manufacturer's specifications.

Choosing a used, original component is particularly beneficial for vehicles in intensive use, where reasonable repair costs are important while maintaining the factory design of the brake system.

Selection and application in service practice

When selecting a brake fluid reservoir for a Ford Transit Custom MK8 with a 2.0 EcoBlue diesel engine, it is crucial to match it to the specific version of the brake system and the vehicle's model year. An original component from the same model family facilitates installation and eliminates the need for system modifications.

To better understand how to optimally combine used brake system components and reduce service costs without compromising safety, it is worth reading our guide: Brake calipers under the microscope – how to choose verified recycled parts for the brake system.

If you are planning a comprehensive repair or upgrade of the braking area in your Ford and need other components from the same group, such as reservoirs, caps, or bleeding elements, check out the available parts in the Ford brake fluid reservoirs and caps category.