Ford Focus Mk3 ST Oil Separator Breather 2.0 Ecoboost Petrol AG9G-6A785-CA

Ford Focus Mk3 ST Oil Separator Breather 2.0 Ecoboost Petrol is a specialized component of the crankcase ventilation system, designed for 2.0 EcoBoost petrol engines in the ST version. It is responsible for stable separation of oil mist from gases before they return to the intake, which promotes cleaner engine operation and reduces carbon deposit buildup. This solution is dedicated to demanding, turbocharged petrol units, where control of the oil circuit is crucial for durability.

Specifications and technical data

• SKU: 1682186
• Mark: Ford
• Condition: Used
• OEM Part Number: 1682186
• Substitutable numbers: AG9G-6A785-CA, AG9G6A785CA, 1682186
• Fuel type: Petrol
• Category: Other Engine Parts

Function of the oil separator breather in the 2.0 EcoBoost engine

The oil separator breather in the Ford Focus Mk3 ST operates within the crankcase ventilation system, where blow-by gases are recirculated into the intake system. The task of this component is:

• separating oil particles from gases before they are reintroduced into the intake,
• reducing oil consumption by the petrol engine,
• reducing contamination of the intake manifold and intake valves,
• maintaining stable pressure in the crankcase under higher loads typical for the ST version. Thanks to a properly functioning separator, the breather system works in a predictable manner, which promotes smooth operation of the turbocharged petrol engine and helps reduce the risk of leaks at the seals.

Purpose and fitment for Ford Focus Mk3 ST

The offered separator is intended for use in the sporty Ford Focus Mk3 ST variant with a 2.0 EcoBoost petrol engine. The design of the component is adapted to the factory breather system in this model, which allows for:

• retaining the original routing of hoses and vacuum ports,
• proper cooperation with the stock intake system and engine management,
• installation at factory mounting points without the need for modifications. Such fitment promotes maintaining consistency with the factory configuration of the power unit, which is important both for road use and when using the car in more dynamic conditions.

Characteristics of the used component

The oil separator breather offered in this variant comes from dismantling and is a used part. This type of part, while maintaining the efficiency of flow channels and connection ports, can still ensure the proper operation of the crankcase ventilation system. In practice, this means the possibility of:

• economical replacement of a damaged or leaking separator,
• maintaining the original specification of the breather system in the Ford Focus Mk3 ST,
• reducing service costs while maintaining functionality. Choosing a used OEM component is often preferred by users who want to stick to solutions consistent with the factory design of the 2.0 EcoBoost engine.

Significance for the durability of the petrol unit

In turbocharged petrol engines, such as the 2.0 EcoBoost in the Focus ST, a functional oil separator breather has an impact on several important areas of operation:

• it stabilizes the amount of oil reaching the intake, which helps keep intake channels cleaner,
• it limits the risk of excessive smoking caused by oil burning in the combustion chamber,
• it supports maintaining the correct air-fuel mixture composition,
• it reduces the load on the turbocharging system from oil escaping from the breather. Thanks to this, the oil separator breather is an important element in the context of maintaining stable operating parameters of the petrol unit and long-term operation of the Ford Focus Mk3 ST. 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 breather hoses, ventilation system housings, or additional modules related to the operation of the power unit, check the available parts in the Other Ford category.

Technical support and knowledge about sports units

When working with high-output petrol engines, it is worth knowing the design differences between standard and sports variants. To expand your knowledge about the specifics of powerful units, fuel systems, and accessory loads, you can refer to material comparing solutions used in high-performance cars – you will find it in the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses, among other things, the differences in engines, brakes, and chassis in the context of part selection.