Audi S4 B8 Secondary Air Pump Injection Pipe Hose Line 8T0133817D

Audi S4 B8 Secondary Air Pump Injection Pipe Hose Line is an original component from the Lines, hoses and pipes group, designed for the air supply system in the sports S4 version of the B8 generation. The design, compliant with the manufacturer's standards, ensures proper airflow routing and stable system operation, which is crucial for both performance and the durability of engine components.

Specifications and technical data

• SKU: 8T0133817D
• Mark: Audi
• Condition: Used
• OEM Part Number: 8T0133817D
• Substitutable numbers: 8T0133817D, 8T0 133 817 D
• Part type: Line
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The presented pipe is responsible for transporting air between the components of the system in which the air pump operates in the Audi S4 B8. A properly shaped pipe minimizes pressure drops and reduces turbulence, which promotes stable operation of the power unit and correct interaction with other intake components.

Thanks to its factory geometry and fitment for the specific model version, the pipe maintains proper connection tightness and correct routing relative to adjacent engine bay components. This helps avoid unwanted stress, rubbing against other parts, and potential leaks that could affect engine performance parameters.

Construction and fitment for Audi S4 B8

Audi S4 B8 Secondary Air Pump Injection Pipe Hose Line has been designed as a component dedicated to a specific power unit configuration, maintaining the correct profile, diameter, and mounting points. The original design facilitates installation in place of the factory pipe, without the need for modifications or the use of adapters.

The pipe belongs to a group of wear-and-tear components that may degrade, harden, or develop micro-cracks over time. Replacing it with an original component that retains its flexibility and shape allows for restoring the correct operation of the air system, reducing the risk of ECU errors, and ensuring repeatable engine operating conditions, which is especially important in high-performance vehicles.

Characteristics of the used component

The offered pipe comes from disassembly and is a used part, which in practice means a favorable compromise between cost and maintaining the manufacturer's original specifications. This type of solution is often chosen for vehicle servicing where compliance with the factory design and fitment to the existing system is a priority.

Using an original pipe from this group allows you to avoid problems typical of aftermarket replacements with imprecise shapes, such as installation difficulties, improper positioning in the engine bay, or an increased risk of leaks. This is particularly important in Audi S4 class cars, where the intake system operates under demanding thermal and pressure conditions.

Benefits of using the original pipe

• Factory fitment to the Audi S4 B8 air pump system, with no modifications required.
• Maintenance of proper airflow and connection tightness within the intake system.
• Reduction of the risk of diagnostic errors related to leaks or incorrect flow.
• Consistency with other elements from the Lines, hoses and pipes group used in this model.

Expanding Audi air system service

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

When planning broader service work, it is also worth expanding your knowledge about typical power unit problems in popular models to better assess the scope of necessary actions and potential costs. The guide material available in the article BMW E90 engine failures: check what can ruin your budget may be helpful, as it shows how to properly prepare for operating a high-performance car.