Ford Transit Connect Fuel Feed Pipe Overflow Oil Hose Line 1.8 TDCi Diesel

Ford Transit Connect Fuel Feed Pipe Overflow Oil Hose Line 1.8 TDCi Diesel is an original component from the Lines, hoses and pipes group, designed for Ford diesel systems. It ensures stable fuel and oil return from the injectors, which supports smooth engine operation and reduces the risk of leaks in the fuel circuit.

Specifications and technical data

• SKU: 4M5Q-9K002-AG
• Mark: Ford
• Condition: Used
• OEM Part Number: 4M5Q-9K002-AG
• Substitutable numbers: 4M5Q-9K002-AG, 4M5Q9K002AGs
• Fuel type: Diesel
• Color: Amethystgrau Metallic - A09
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The overflow hose in a diesel engine is responsible for the controlled return of excess fuel and oil from the injectors to the system, stabilizing operating pressure. In TDCi units, this has a direct impact on engine refinement, correct fuel metering, and limiting air ingress. Using an original Ford hose allows for maintaining factory flow parameters and resistance to loads typical for diesel engines.

Construction and material properties

The component belongs to the Lines, hoses and pipes group, which means it is designed for operation in a fuel-oil environment. The materials and seals used are designed for contact with diesel fuel and engine oil, as well as variable temperatures in the engine compartment. The Amethystgrau Metallic - A09 color facilitates visual identification of the hose in the dense engine bay and assists in quick servicing.

Compatibility with diesel engines

The hose has been developed to work with Diesel supply systems, characteristic of Ford's TDCi units. The appropriate internal diameter, flexibility, and resistance to pressure pulsations are adapted to the specifics of direct injection, which reduces the risk of micro-cracks and leaks during long-term operation.

Condition, origin, and advantages of using Ford parts

The offered hose is a used component, which in practice means the possibility of an economical repair of the fuel system while maintaining the original geometry and Ford quality. Such components are particularly valued in workshops specializing in the brand, where repeatability of assembly, proper hose routing, and compatibility with factory brackets and connectors are important.

Using an original overflow hose helps minimize the risk of connection leaks, improper positioning in the engine compartment, and collisions with other accessory components. This is a beneficial solution both for point replacement of a damaged section and for broader service work within the supply system.

Support for expanding the Ford hose system

If you are planning a comprehensive repair or upgrade of the fuel system area in your Ford and need other elements from the same group, such as flexible return sections, rigid guide pipes, or additional breather hoses, check the available parts in the Ford lines, hoses and pipes category.

Technical knowledge and development of supply systems

For those interested in the broader context of the development of modern supply systems and the impact of fuel lines on engine performance characteristics, an article describing the evolution of construction in popular sports models may be helpful – you can find it here: Hot-hatch legend: the evolution of the VW Golf GTI from Mk1 to Mk8 – design changes and VW car parts. It allows for a better understanding of how seemingly minor elements of the fuel installation affect the reliability and parameters of the power unit.