Ford Focus St-3 Mk3 Throttle Body Air Intake DS7E-9F991-BB

Ford Focus St-3 Mk3 Throttle Body Air Intake is a key component of the intake system in the sports version of the Focus, responsible for the precise metering of air into the petrol engine. A properly selected, original throttle body ensures stable engine operation, predictable throttle response, and consistent performance. By choosing this component from the Throttle Bodies category, you are opting for a solution structurally matched to the ST-3 Mk3 version.

Specifications and technical data

• SKU: 5233328
• Mark: Ford
• Condition: Used
• OEM Part Number: 5233328
• Substitutable numbers: 5233328, DS7E9F991BB, DS7E-9F991-BB
• Fuel type: Petrol
• Part type: Throttle Body
• Category: Throttle Bodies

Purpose and function in the intake system

The air throttle body in the Ford Focus ST-3 Mk3 works in direct conjunction with the engine management system, regulating the amount of air drawn into the cylinders. In a petrol engine, the stable operation of this component is particularly important as it affects engine refinement, acceleration dynamics, and fuel consumption. A properly functioning throttle body helps maintain a steady idle, smooth revving, and predictable response to accelerator pedal input.

Benefits of using an original Ford throttle body

Using an original throttle body dedicated to the ST-3 Mk3 version allows you to maintain factory engine performance parameters. This component is structurally matched to the characteristics of the petrol unit, which translates into:

• consistent cooperation with the factory engine control unit,
• stable air-fuel mixture values across the full load range,
• repeatable throttle response, essential for dynamic driving,
• reduced risk of errors and limp mode resulting from incorrect throttle signals. For ST-3 Mk3 users, maintaining the characteristic sporty acceleration profile is particularly important – a functional throttle body has a direct impact on the perceived flexibility and smoothness of power delivery.

Condition, verification, and preparation for installation

The offered throttle body comes from the group of used original Ford components, meaning it is a dismantled part that retains its factory design and geometry. This type of part is a good choice when your current throttle body shows signs of wear, such as unstable idle, jerking during acceleration, or intermittent engine limp mode. Replacing it with a verified element of the same design reference allows you to restore the correct operation of the intake system without the need for an expensive purchase of a new unit.

Technical aspects and compatibility

The throttle body is designed for a petrol engine, which is significant when selecting parts within a single model generation. The design and operating parameters are adapted to the specifics of the petrol unit, where air intake regulation has a key impact on the combustion process. When selecting the component, it is worth paying attention to compatibility with the body style and Focus generation to ensure proper fitment with the intake manifold and the vehicle's electrical harness.

Ford Throttle Bodies – expansion and service of the intake 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 throttle housings, control elements, or additional intake components, check the available parts in the Ford Throttle Bodies category.

Additional technical materials

If you are interested in a broader context of engine component selection, comparisons of power units, and the impact of aftermarket parts on operating costs, it is worth reading an article comparing popular BMW diesel units – you can find it here: BMW N47 vs M57 / M57N / M57N2 – a ranking of legendary diesels. Although it concerns a different brand and engine type, it well illustrates how important the proper selection of components is in the context of durability and economy of use.