Audi A4 S4 B8 A5 8T Engine Vacuum Hose Tube Pipe Line 03L131552AR

The Audi A4 S4 B8 A5 8T Engine Vacuum Hose is an original part from the Hoses, Tubes, and Pipes group, designed for precise vacuum routing within the engine system. Thanks to its factory geometry and perfect fit for Audi powertrains, it ensures stable operating conditions for auxiliary components and predictable engine performance.

Specifications and technical data

• SKU: 03L131552AR
• Mark: Audi
• Condition: Used
• OEM Part Number: 03L131552AR
• Substitutable numbers: 03L131552AR, 03L 131 552 AR
• Part type: Hose
• Category: Hoses, Lines & Pipes

Vacuum Hose Purpose and Function

The vacuum hose in an engine is responsible for the safe and leak-proof transmission of vacuum between control system elements and auxiliary components. In Audi A4, S4 B8, and A5 8T vehicles, it is crucial for the proper operation of subsystems such as vacuum actuators, control valves, and intake system components.

A correctly selected hose reduces the risk of:

• power loss due to system leaks,
• unstable idle RPM,
• engine control unit errors related to incorrect manifold pressure.

Construction and Fit for Audi Models

The offered vacuum hose is a component specifically designed for the powertrains used in Audi A4 S4 B8 and A5 8T. This ensures proper routing of the hose within the engine bay and secure mounting in factory brackets. Original origin means adherence to the correct inner diameter, flexibility, and resistance to temperature and chemical agents typical of the engine's operating environment.

This allows for an organized installation without the need for modifications, ensuring the hose does not interfere with other auxiliary components or suffer from excessive bending.

Benefits of Using an Original Hose

Using an original vacuum hose to replace a worn or non-factory part restores the correct parameters of the intake and control systems. Key benefits include:

• Stable Vacuum – reducing the risk of micro-leaks that are difficult to diagnose with basic service methods.
• Proper Material Flexibility – the hose does not collapse under vacuum and maintains its working cross-section across the full temperature range.
• Factory Routing in the Engine Bay – lower risk of abrasion, overheating, and contact with moving parts.
• Compatibility with Other System Components – the hose works with original connectors, T-pieces, and valves without the need for additional adapters.

Item Condition and Service Application

The offered hose is from the used parts group, which in service practice often represents a sensible compromise between repair cost and maintaining original quality. This type of component is particularly useful for:

• resolving vacuum system leaks after smoke diagnostics,
• restoring factory hose routing after previous modifications,
• comprehensive servicing of engine auxiliary components in intensively used vehicles.

By maintaining original geometry and material parameters, the risk of vacuum-related faults recurring after repair can be effectively reduced.

Selection Support and Related Parts

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other parts from the same group, such as vacuum hoses, intake system hoses, or breather pipes, check the available parts in the Audi Hoses, Tubes, and Pipes category.

When planning repairs using salvaged parts, it is also worth familiarizing yourself with practical tips for safely selecting components – the article Brake Calipers Under the Microscope: How to Effectively Reduce Brake System Repair Costs by Choosing Proven Used Parts, which shows how to consciously use original used parts in various vehicle systems, may be helpful.