Audi A8 D3 Brake Servo Booster Master Cylinder Brake Unit 4E2612105G

Audi A8 D3 Brake Servo Booster Master Cylinder Brake Unit is an original brake system component designed for Audi brand models. It provides proper brake pedal force assistance, stabilizing the operation of the entire system and allowing you to maintain the factory braking parameters in your Audi A8 D3.

Specifications and technical data

• SKU: RHD-4E2612105G
• Mark: Audi
• Condition: Used
• OEM Part Number: 4E2612105G
• Substitutable numbers: 4E2612105G, 4E2 612 105 G, 4E2 612 107 A, 4E2612107A, 4E0 611 301 A, 4E0611301A
• Part type: Brake Servo & Master Cylinder
• Category: Brake Servos

Purpose and function in the brake system

The presented Audi A8 D3 Brake Servo Booster Master Cylinder Brake Unit is responsible for braking force assistance and precise pressure distribution in the brake circuits. Combined with other system components, it allows for a predictable pedal response, shorter braking distances, and vehicle stability during heavy braking.

As a part of the Brake Servos and Proportioning Valves category, this component works with the vacuum system and brake hydraulics, providing the driver with clear yet controlled assistance without excessive pedal "sponginess."

Original origin and installation compatibility

The product comes from the Audi OE line, which means factory-fitment for the Audi A8 D3 design. Original manufacturing translates into:

• maintaining factory-compliant geometry and mounting points,
• proper cooperation with the factory ABS/ESP system,
• no need for installation modifications when the correct model is selected.

Thanks to this, the brake servo with master cylinder can be used as a replacement part for a worn-out unit, restoring the original performance of the brake system.

Performance characteristics and benefits of use

Choosing an original brake servo with master cylinder for the Audi A8 D3 allows you to maintain the consistency of the entire brake system according to the manufacturer's specifications. Key benefits include:

• stable brake assistance across the full load range,
• repeatable, predictable brake pedal operation,
• reduced risk of system malfunction resulting from part mismatch.

This component is particularly important in high-end vehicles such as the Audi A8 D3, where vehicle weight and performance require an efficient, well-tuned brake system.

Condition and practical application

The offered part is used, which allows for an economical repair of the brake system while maintaining the manufacturer's original specifications. This type of solution is often chosen for comprehensive repairs when replacing several components at once is necessary, and maintaining compatibility with the factory design remains a priority.

Before installation, standard service procedures are recommended: checking the system for leaks, bleeding the brakes, and verifying the correct operation of the brake pedal after installation, in accordance with the vehicle manufacturer's guidelines.

Expanding the Audi brake system

If you are planning a comprehensive repair or upgrade of the braking zone in your Audi and need other components from the same group, such as servos, proportioning valves, or complete assistance modules, check out the available parts in the Audi Brake Servos and Proportioning Valves category.

More on selecting used OEM parts

When planning a brake system repair, it is worth making an informed choice regarding used original components. Practical tips on comparing used OEM parts with aftermarket replacements, along with examples of applications in popular models, can be found in the article 5 reasons why a used OEM part is a better choice than a replacement.

If you are simultaneously servicing other vehicle systems, such as air conditioning or heating, the general principles of selecting and maintaining OEM components described in the post Air conditioning and heating – part selection and maintenance for year-round comfort may be helpful, which can be analogously applied when planning the maintenance and repair schedule for your Audi.