Ford Focus MK3 Transit Fiesta Manifold Air MAP Pressure Sensor AG919F479AA

Ford Focus MK3 Transit Fiesta Manifold MAP Sensor AG919F479AA is an original part from the Air and Fuel Intake Sensors group, designed for precise measurement of manifold pressure. A used OEM component ensures proper cooperation with the factory engine control unit, stable engine operation, and predictable performance parameters.

Specifications and technical data

• SKU: AG919F479AA
• Mark: Ford
• Condition: Used
• OEM Part Number: AG919F479AA
• Substitutable numbers: AG919F479AA, AG91-9F479-AA, 0261230265, 0 261 230 265
• Category: Air Intake & Fuel Sensors

Purpose and Function of the MAP Sensor

The Manifold Absolute Pressure (MAP) sensor is responsible for measuring engine load based on the air pressure in the intake manifold. Based on this, the control unit adjusts fuel injection, ignition timing, and the boost system strategy. A properly functioning component from this group reduces the risk of power loss, increased fuel consumption, or uneven engine operation.

For Ford Focus, Transit, and Fiesta models, using the correct sensor from the Air and Fuel Intake Sensors category is crucial for maintaining factory engine performance parameters and proper OBD diagnostics.

Benefits of Using an Original Ford Sensor

Choosing an original Ford manifold pressure sensor offers a range of practical advantages:

• maintaining factory engine performance characteristics without the need for ECU software modifications,
• correct signal interpretation by the ECU, facilitating diagnostics and reducing the occurrence of errors in the control unit's memory,
• stable measurement values across the full range of loads and RPMs,
• compatibility with the electrical system and intake manifold designed for the specific Ford vehicle generation.

This makes the MAP sensor a suitable choice for both standard replacement of a worn-out part and for restoring full intake system functionality after mechanical repairs.

Component Characteristics and Installation

The presented sensor belongs to the OEM components group from the Ford brand, meaning it complies with factory requirements regarding output signal, measurement range, and mounting method. The element is designed for operation in the intake manifold (manifold), where it is exposed to variable pressure and temperature conditions, hence its construction is engineered for long-term use.

In practice, installation involves replacing the existing sensor with one of the correct part number, ensuring proper connection of the electrical connector. A correctly chosen sensor from this series helps avoid issues with socket fit, sealing, and mounting geometry in the manifold.

Component Condition and Diagnostic Application

The offered sensor is from the aftermarket and is designated as a used original part. Such components are often chosen in professional workshops for cost-effective repairs where OEM quality at a reasonable service cost is important. A properly functioning MAP sensor is also important for diagnostics, enabling reliable interpretation of real-time parameters in diagnostic testers.

If you are considering broader use of aftermarket electronics, including sensors and control modules, it is worth reading the guide on our blog: Used Automotive Electronics – ECU Modules and Second-Hand Sensors in Practice. There you will find information on selection by OEM numbers, compatibility issues, and typical installation procedures.

Related Components and Ford Part Selection

When replacing the MAP sensor in Ford engines, the condition of other intake system components is often also assessed, such as vacuum hoses, the manifold, throttle body, or other sensors related to air and fuel measurement. To facilitate the selection of compatible components within the same group, check the available parts in the Ford Air and Fuel Intake Sensors category.