Ford Focus Mk2 Fuel Pump Sender Unit 2.5 Duratec Petrol Engine ST C1BY-9H307-AD

Ford Focus Mk2 Fuel Pump Sender Unit 2.5 Duratec Petrol Engine ST is an original component from the Fuel pumps and level sensors category, designed for petrol engines with high flow requirements. The use of a complete module ensures stable power supply to the engine unit and precise fuel level readings, which translates into predictable system operation and driving comfort.

Specifications and technical data

• SKU: C1BY-9H307-AD
• Mark: Ford
• Condition: Used
• OEM Part Number: C1BY-9H307-AD
• Substitutable numbers: C1BY-9H307-AD, C1BY9H307AD
• Fuel type: Petrol
• Part type: Fuel Sending Unit
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The fuel pump module with a level sensor is a key component of the fuel supply system in the 2.5 Duratec petrol engine used in the ST version. It is responsible for maintaining the appropriate pressure and flow rate of petrol from the tank to the fuel rail, while the integrated level sensor transmits information about the fuel quantity in the tank to the instrument cluster.

This solution allows for:

• stable engine power supply across the full load range,
• proper operation of the injection system during dynamic driving,
• reliable fuel level readings on the dashboard,
• maintenance of the engine unit's factory performance parameters.

Compatibility and part identification

The offered module is intended for the Ford Focus Mk2 in the sporty ST trim with the 2.5 Duratec petrol engine. Thanks to the use of the original manufacturer's marking and the availability of interchangeable numbers, the part can be precisely verified for compatibility with a specific vehicle equipment version and model year.

In practice, this means that when correctly selected according to vehicle data and reference numbers, the module maintains full compatibility with the factory electrical installation and fuel tank design, which facilitates installation and reduces the risk of operational issues.

Technical characteristics and advantages of use

The fuel pump module has been designed to work with petrol fuel, in accordance with the requirements of the 2.5 Duratec unit. The OEM design ensures appropriately selected performance, operating characteristics, and compatibility with the factory engine management system.

Key benefits of using this component:

• maintenance of power supply parameters in accordance with Ford manufacturer specifications,
• proper cooperation with the stock ST engine control system,
• integrated fuel level sensor matched to the tank geometry,
• reduction of the risk of fuel level indication errors and starting problems.

As a part from the Fuel pumps and level sensors category, the module combines the functions of supply and measurement in one assembly, which simplifies maintenance and replacement in case of wear.

Condition, installation, and service application

The item is offered in used condition, which allows for cost-effective repair of the fuel system while maintaining the original manufacturer's specifications. The module is intended for installation in place of the factory fuel pump in the tank, using stock mounting points and factory electrical connectors.

Replacing the complete assembly is particularly recommended in situations where symptoms such as hot start problems, power drops under higher load, or unstable fuel level readings occur. Using an original module allows for restoring the correct system operation without the need for installation modifications.

Technical support and additional materials

To better understand the role of this module in the entire fuel supply system, it is worth reading the guide describing the diagnostics and operation of components such as injectors, pumps, and the fuel tank – a detailed discussion can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Ford and need other components from the same group, such as pump modules, assemblies with level sensors, or complete tank inserts, check the available parts in the Ford fuel pumps and level sensors category.

Additional tips on the safe selection of used components, including verifying compatibility by OEM and reference numbers, are provided in the expert guide how to professionally select used car parts, which helps reduce the risk of an incorrect purchase.