Audi RS4 B8 Brake Servo Booster Vacuum Pipe Electric Pump Line 8T0611931C

Audi RS4 B8 Brake Servo Booster Vacuum Pipe Electric Pump Line is a component from the Brake hoses, lines and connectors group, designed for the brake booster system in Audi vehicles. It is responsible for the stable delivery of vacuum to the brake servo, which translates into predictable brake pedal response and safe deceleration. This is a solution for users looking for a technically matched component for the demanding, high-performance design of the RS4 B8.

Specifications and technical data

• SKU: 8T0611931C
• Mark: Audi
• Condition: Used
• OEM Part Number: 8T0611931C
• Substitutable numbers: 8T0611931C, 8T0 611 931 C
• Part type: Pipe
• Category: Brake Hoses, Lines & Fittings

Purpose and role in the braking system

The brake servo vacuum pipe in the Audi RS4 B8 works in direct connection with the intake system and the brake servo, ensuring the appropriate level of vacuum to assist the force applied to the pedal. A properly selected pipe reduces the risk of decreased braking efficiency, unstable pedal operation, or increased braking distance.

Due to the characteristics of the RS4 B8 power unit, the vacuum system is under more load than in standard versions, which is why proper pipe fitment is essential for maintaining consistent braking parameters during dynamic driving.

Construction and performance parameters

The pipe belongs to the group of components responsible for transporting the working medium in the braking system, with an emphasis on resistance to vacuum and temperature changes in the engine bay. The design is engineered to:

• maintain airtightness under variable braking system loads,
• preserve stable geometry near hot engine components,
• reduce vibrations transmitted to the brake servo.

Thanks to its factory fitment for the RS4 B8 platform, the pipe routes the medium as intended by the manufacturer, maintaining appropriate bending radii and mounting points. This facilitates installation and reduces the risk of improper routing in the engine bay.

Use in service and repairs

This component is particularly important when diagnosing issues with a hard brake pedal, uneven booster operation, or suspected leaks in the vacuum circuit. Replacing the brake servo vacuum pipe is recommended, among other situations, when:

• a leak or micro-cracks have been identified on the existing pipe,
• intermittent drops in brake booster efficiency occur,
• the braking system was disconnected during major service work in the engine bay.

Choosing a pipe dedicated to the Audi RS4 B8 allows for maintaining compliance with the factory braking system concept, which is important for both safety and subsequent service diagnostics.

Product characteristics and condition

The offered pipe comes from an Audi vehicle and is classified as a used part. This means it has been previously used but can still perform its function in the braking system, provided it is correctly installed and verified for compatibility with the specific vehicle configuration. For users looking for an economical solution to repair the vacuum system, this is a reasonable alternative to purchasing a new part.

Before installation, a standard visual inspection and a leak test under workshop conditions are recommended. A properly selected and installed brake servo vacuum pipe helps maintain stable braking system performance, which is crucial for the daily operation of a high-performance vehicle.

Safety and selection of used brake components

When choosing used components from the brake area – including vacuum pipes – it is worth considering not only the price but also the origin and compatibility with the specific model. For drivers who want to deepen their knowledge on the safe selection of aftermarket braking system components, we have prepared a practical guide: Second-hand braking system: how to safely choose discs, calipers, and ABS?.

If you are planning a comprehensive repair or upgrade of the braking area in your Audi and need other elements from the same group, such as flexible hoses, rigid lines, or servo connectors, check out the available parts in the Audi brake hoses, lines and connectors category.