Audi A4 B8 Brake Servo Booster Master Cylinder Braking Unit 1K2614105BN

Audi A4 B8 Brake Servo Booster Master Cylinder Braking Unit is a factory-original braking system component designed for Audi models, ensuring stable transmission of force to the brake pedal. This complete assembly, including the servo booster and master cylinder, has been engineered for precise pressure regulation and safe, consistent brake system operation, which is crucial for daily vehicle use.

Specifications and technical data

• SKU: RHD-1K2614105BN
• Mark: Audi
• Condition: Used
• OEM Part Number: 1K2614105BN
• Substitutable numbers: 1K2614105BN, 1K2 614 105 BN
• Category: Master Cylinders

Purpose and function in the braking system

The described brake servo and master cylinder assembly is responsible for boosting braking force and transmitting it to the hydraulic circuits. In practice, this means the driver receives a clear vehicle response with relatively light pressure on the brake pedal, while the system maintains predictable operating characteristics.

As a part of the Brake master cylinders group, this component works with other system elements – lines, calipers, and discs – to create a cohesive, leak-proof, and efficient system responsible for driving safety. Using an original Audi solution allows you to maintain the factory braking characteristics without the need for vehicle modifications.

Benefits of using an original Audi assembly

Choosing an original Audi brake servo and master cylinder assembly translates into a number of practical advantages:

• Factory fitment for the Audi A4 B8 braking system, with no need for modifications to mounts or installation.
• Consistent brake pedal feel, in accordance with the vehicle manufacturer's specifications.
• Ability to utilize the existing braking system architecture, which facilitates service and diagnostics.
• A solution designed for durability and resistance to typical operational loads.

Thanks to this, maintaining stable braking performance is possible without interfering with the vehicle's construction, and technicians can be confident working with a component that complies with Audi's technical documentation.

Condition, verification, and selection by part numbers

This item comes from a group of used parts, which allows for optimized repair costs while maintaining the manufacturer's original specifications. The brake servo and master cylinder assembly has an assigned OEM part number and interchangeable numbers, which facilitates precise identification and selection for a specific vehicle configuration. Before installation, it is recommended to perform a standard check of the system for leaks and proper operation of the booster mechanism, in accordance with Audi service procedures.

Professional installation and operation

Due to the importance of the braking system for safety, the installation of the brake servo and master cylinder assembly should be performed by an experienced workshop, following bleeding and leak-check procedures. A correctly installed component ensures:

• stable pressure in the brake circuits,
• consistent pedal response in various road conditions,
• seamless operation with the vehicle's factory ABS/ESP system.

After installation, it is worth performing a test drive and checking the braking force at a diagnostic station to confirm the proper cooperation of all system components.

Expanding the Audi braking system – related items

If you are planning a comprehensive repair or upgrade of the braking area in your Audi and need other items from the same group, such as pumps, servos, or booster modules, check out the available parts in the Audi brake master cylinders category.

Part selection by numbers and cost optimization

When replacing braking system components, much like with the fuel system, it is crucial to correctly match parts using OEM and interchangeable numbers. A detailed discussion of selection principles by part numbers, diagnostics, and regeneration can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which organizes the approach to working with components of similar complexity.

If you are interested in a broader context regarding the use of pre-owned components in the VAG group and want to better plan your repair budget, it is also worth reading the material on Volkswagen engines – Volkswagen 1.9 TDI vs 1.4 TSI – evolution of VW engines and repair costs. This will allow you to better assess how using original, pre-owned components affects the total cost of vehicle maintenance.