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Ford Focus ST Mk3 Selenoid Boost Pressure Valve Unit 2.0 Petrol BL3E-9K378-BA
SKU: BL3E-9K378-BA
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Used
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Ford Focus ST Mk3 Selenoid Boost Pressure Valve Unit 2.0 Petrol is a precision component of the boost pressure control system, specifically designed for the 2.0 petrol engine in the sporty ST version. It is responsible for dynamic and stable turbocharger management, which translates into repeatable performance, predictable throttle response, and safe engine load across a wide rev range.
Specifications and technical data
- SKU: BL3E-9K378-BA
- Mark: Ford
- Condition: Used
- OEM Part Number: BL3E-9K378-BA
- Substitutable numbers: 5170590, BL3E-9K378-BA, BL3E9K378BA
- Fuel type: Petrol
- Part type: Intake Valve
- Category: Valves
Purpose and function in the boost system
The boost pressure solenoid valve in the Ford Focus ST Mk3 plays a key role in controlling the pressure generated by the turbocharger. Based on signals from the engine control unit, it regulates the flow of vacuum or control pressure, which allows it to:
- maintain stable boost pressure within the specified operating range,
- reduce the risk of overboost and uncontrolled power spikes,
- support smooth torque delivery throughout the rev range,
- ensure predictable response to accelerator pedal input. For the 2.0 petrol unit in the ST version, a properly functioning solenoid valve is essential for both performance and the durability of the boost system components.
Benefits of using an original Ford valve
The offered component comes from the Ford line, which means it maintains factory operating parameters and full compatibility with the control characteristics used in the Focus ST Mk3. In practice, this translates into:
- proper cooperation with the stock engine control unit software,
- appropriate valve response times during rapid load changes,
- stable boost pressure during track and road driving,
- reduced risk of diagnostic errors related to the boost system. By maintaining the original control characteristics, the boost system operates in a predictable manner, which is particularly important in a car designed for sporty driving.
Mounting characteristics and system integration
The boost solenoid valve is structurally prepared for direct integration with the pressure control system in the Ford Focus ST Mk3. This includes:
- dedicated geometry of the connection ports for vacuum or control pressure lines,
- electrical connector matched to the engine wiring harness,
- mounting point allowing for stable installation in the engine bay. Such a solution allows for efficient replacement of the component as part of standard service procedures, without the need for installation modifications.
Component condition and application in the petrol system
The presented solenoid valve comes from the Valves group and is designed to work in a Petrol supply system, meaning it is adapted to the thermal and pressure characteristics of the 2.0 petrol unit. As a used component, it is a cost-effective solution for users who:
- are looking for parts consistent with factory specifications while maintaining reasonable costs,
- want to restore proper boost system operation after experiencing pressure regulation errors,
- are planning preventive maintenance on a car operated under high load conditions.
Comprehensive Ford valve system support
If you are planning a comprehensive repair or upgrade of the engine area in your Ford and need other components from the same group, such as control valves, vacuum solenoids, or regulating valves, check out the available parts in the Ford Valves category.
Technical support for selecting used components
When choosing used powertrain components, such as valves, engines, or gearboxes, it is worth relying on reliable technical data and selection procedures based on identification numbers. An extended discussion on the advantages and principles of safely using used components can be found in the article Why it is worth buying used gearboxes and engines – facts instead of myths, which clarifies the most important technical and economic issues related to such purchases.
Delivery details
Ship to: United Kingdom
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