Audi A3 8V Brake Servo Master Fluid Reservoir Expansion Tank Bottle 5Q2611301H

Audi A3 8V Brake Servo Master Fluid Reservoir Expansion Tank Bottle is an original brake system component designed to work with the brake servo and master cylinder. This used, factory-spec reservoir ensures stable storage and monitoring of brake fluid levels, which directly impacts the efficiency and safety of your Audi's braking performance.

Specifications and technical data

• SKU: rhd-5Q2611301H
• Mark: Audi
• Condition: Used
• OEM Part Number: 5Q2611301H
• Substitutable numbers: 5Q2611301H, 5Q2 611 301 H
• Category: Reservoirs & Caps

Purpose and function in the brake system

The offered reservoir is part of the Brake fluid reservoirs and caps category, responsible for storing fluid and supplying it to the brake master cylinder and servo. The manufacturer's design allows for:

• maintaining the correct fluid level throughout the entire operating range of the system,
• stable supply to the brake master cylinder during pressure changes,
• compatibility with the fluid level sensor (if present in the specific vehicle configuration),
• proper venting of the space above the fluid level.

By using an original component, the factory operating characteristics of the brake system are maintained, which is crucial for precise braking force modulation.

Original origin and fitment for Audi

As an Audi brand product, the reservoir was designed specifically for the brake system architecture of the A3 8V generation model. This means:

• mounting geometry compatible with the factory brake servo/master cylinder,
• properly shaped hose connection ports,
• compatibility with the factory cap and seals specified by the manufacturer.

Choosing an original reservoir from disassembly allows you to maintain the structural integrity of the entire brake system without the need for modifications or adapters.

Condition, inspection, and preparation for installation

The item is offered as used, which means it has been removed from a vehicle and verified for further serviceability. Before installation, it is recommended to:

• thoroughly flush the inside of the reservoir with appropriate brake fluid,
• check the connection ports for leaks and mechanical damage,
• verify the condition of the cap and any seals that interface with the servo.

This approach allows you to fully utilize the potential of a used part while maintaining safe and consistent brake system operation.

Benefits of using an original used reservoir

Using an original brake fluid reservoir from the secondary market is a solution that combines economic benefits with the preservation of the parameters specified by the vehicle manufacturer. In practice, this means:

• lower cost compared to a new part while maintaining factory design,
• guaranteed fitment for the Audi A3 8V brake system without modifications,
• ease of replacement within standard service procedures.

If you want to better understand how to safely use recycled parts in the brake system and how to optimize repair costs, it is worth reading the article: Brake calipers under the microscope – how to reduce brake system repair costs by choosing verified recycled parts.

Expansion and modernization of the Audi brake system

If you are planning a comprehensive repair or upgrade of the braking area in your Audi and need other components from the same group, such as additional reservoirs, caps, or parts that work with the system, check out the available parts in the Audi brake fluid reservoirs and caps category.

Summary

Audi A3 8V Brake Servo Master Fluid Reservoir Expansion Tank Bottle is a practical solution for users who want to restore proper brake system function while maintaining the original design. By choosing a factory-spec used component, you gain compatibility with the Audi brake system and the possibility of an economical, yet technically correct, vehicle repair.