Ford Focus MK3 ST Vacuum Selenoid Valve Pipe Hose Line 2.0 Petrol CJ5E-9961-BF

Ford Focus MK3 ST Vacuum Selenoid Valve Pipe Hose Line is an original vacuum system component designed for petrol-powered engines. This specialized hose belongs to the Lines, hoses and pipes category and has been engineered for stable solenoid valve operation and precise vacuum control within the engine. Thanks to its factory geometry and fitment, it allows for maintaining the correct operating parameters of the control system.

Specifications and technical data

• SKU: 5247043
• Mark: Ford
• Condition: Used
• OEM Part Number: 5247043
• Substitutable numbers: 5247043, CJ5E-9961-BF, CJ5E9961BF
• Fuel type: Petrol
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and function in the vacuum system

The vacuum solenoid valve hose in the version dedicated to the Ford Focus MK3 ST with a 2.0 petrol engine is responsible for a tight and stable connection between vacuum control components. A properly selected hose reduces the risk of pressure drops, leaks, and disturbances in the operation of vacuum-dependent systems, such as engine accessory control or auxiliary components. The appropriate material flexibility and factory-specified inner and outer diameters allow for secure seating on the solenoid valve ports without the need for non-factory modifications. This ensures the consistency of the entire system, which promotes repeatable engine operating parameters.

Construction and fitment for Ford Focus MK3 ST

The component has been designed as part of the vacuum system in Ford vehicles, taking into account the specific routing of hoses in the engine bay of the ST version. The shape of the hose, its length, and bend points are adapted to the factory layout of the solenoid valve and other components, which facilitates installation and minimizes the risk of rubbing against other parts. Belonging to the Lines, hoses and pipes category means that this is a wear-and-tear item that should be periodically checked during vacuum system service for signs of wear, micro-cracks, or material hardening. Using the correct hose instead of a worn-out or non-factory replacement helps restore predictable engine behavior and reduce diagnostic issues related to leaks.

Performance characteristics and advantages of use

The vacuum solenoid valve hose designed for the petrol engine provides:

• stable vacuum routing within the engine's operating temperature range,
• adequate resistance to conditions prevailing in the engine bay,
• factory fitment to solenoid valve ports and adjacent components,
• reduction of the risk of ECU errors resulting from system leaks. For the user, this means more predictable engine response to load, easier diagnostics of potential faults, and the ability to maintain the vacuum system in a configuration consistent with the manufacturer's specifications. Using an original hose is particularly important in high-performance units such as the ST version, where the stability of operating parameters has a direct impact on driving refinement.

Component condition and installation aspects

The offered hose comes from the used parts group, which allows for an economical replacement of the component while maintaining factory specifications. Before installation, a standard vacuum system check is recommended, including inspecting ports, clamps, and adjacent hoses to eliminate other potential sources of leaks. Installation involves removing the old hose, cleaning the contact surfaces, and seating the hose onto the solenoid valve ports and other system components. Proper routing of the hose in factory guides reduces stress and extends its service life.

Service expansion within the hose system

If you are planning a comprehensive repair or upgrade of the engine area in your Ford and need other elements from the same group, such as vacuum lines, supply hoses, or return pipes, check the available parts in the Ford lines, hoses and pipes category. For those interested in a broader look at the development of design and technical solutions in the luxury car segment, an article describing changes in systems and components over the years may be helpful – you can find it here: Evolution of the Mercedes S-Class: from W140 to W222 – innovations, model differences, and Mercedes auto parts over the years.