Citroën Relay III EGR Diesel Vacuum Control Pipe 9676470480 031006175672F

Citroën Relay III EGR Diesel Vacuum Hose is a component from the Brake Hoses, Lines, and Connectors category, designed for use with diesel engines. Engineered as part of the vacuum system, it ensures stable control of the EGR valve and other vacuum consumers, leading to predictable engine operation and proper functioning of the vacuum-assisted braking system.

Specifications and technical data

• SKU: 9676470480
• Mark: Citroën
• Condition: Used
• OEM Part Number: 9676470480
• Substitutable numbers: 031006 1 756 72F, 031006175672F, 9676470480
• Fuel type: Diesel
• Part type: Pipe
• Category: Brake Hoses, Lines & Fittings

Purpose and Role in the Vacuum System

The EGR vacuum hose in the Citroën Relay III is responsible for the controlled transmission of vacuum between control elements and the exhaust gas recirculation valve. A correctly selected and sealed hose:

• stabilizes the operation of the EGR valve in diesel engines,
• reduces the risk of power loss resulting from system leaks,
• supports the proper functioning of the vacuum servo-assisted braking system,
• minimizes the risk of engine control unit errors related to incorrect manifold pressure.

Thanks to its design tailored to the specific application in the Relay III model, the hose maintains proper routing within the engine bay and integrates with factory brackets and connectors.

Benefits of Using an Original Citroën Hose

Choosing an EGR vacuum hose dedicated to the Citroën Relay III allows for the preservation of the system's original operating characteristics. The original geometry and internal diameter of the hose contribute to:

• maintaining adequate vacuum flow across the entire engine load range,
• reducing flow resistance compared to generic universal replacements,
• easier diagnostics – system operating parameters remain consistent with manufacturer specifications.

This solution is particularly beneficial for commercial vehicles where consistent operation, predictable response to load, and minimized service downtime are crucial.

Product Characteristics and Condition

The offered EGR vacuum hose belongs to the group of components intended for Diesel engines, meaning it is adapted to the high thermal and pressure loads typical of diesel units. As a used component, this hose is designed for users and workshops seeking an economical solution while maintaining compatibility with the original system design.

This approach allows for cost optimization of repairs while ensuring proper hose routing, connector placement, and compatibility with original connectors in the Citroën Relay III.

Application in the Braking System and Diagnostics

As a component from the Brake Hoses, Lines, and Connectors category, the vacuum hose is important not only for EGR control but also for the operation of brake assist, if the servo system draws from the same vacuum source. In practice, its condition affects:

• the force of brake assistance at low and medium engine speeds,
• the stability of the vacuum pump operation,
• the frequency of error messages related to the braking system or engine.

When diagnosing symptoms such as a hard brake pedal, unstable idle speed, or occasional power loss, checking vacuum hoses – including the EGR hose – is one of the fundamental service steps.

Related Products and Technical Knowledge

If you are looking for other Citroën Brake Hoses, Lines, and Connectors, check out the Citroën Brake Hoses, Lines, and Connectors available in our store to select vacuum and braking system components from a single, cohesive product line.

For comprehensive servicing of the braking system in your vehicle, it is also worth consulting the guide on our blog. The article Second-Hand Braking System: How to Safely Choose Discs, Calipers, and ABS? provides a practical checklist to help assess the condition of used components and make informed repair decisions based on aftermarket parts.

Summary

The Citroën Relay III EGR Diesel Vacuum Hose is a functional component of the vacuum and braking system, designed for diesel engines. Using a dedicated hose ensures proper operation of the EGR valve, stable brake assistance, and compliance with the vehicle's original design, which is particularly important in heavily used commercial vehicles.