Ford Fiesta Mk6 Engine Oil Separator Breather Box 1.6 Petrol BM5G-6A785-BC

Ford Fiesta Mk6 Engine Oil Separator Breather Box 1.6 Petrol is an original crankcase ventilation system component designed for petrol-powered engines. A fully functional oil separator helps maintain stable engine operating parameters, reduces blow-by, and lowers the risk of uncontrolled leaks in the lubrication system.

Specifications and technical data

• SKU: 1847101
• Mark: Ford
• Condition: Used
• OEM Part Number: 1847101
• Substitutable numbers: 1847101, BM5G-6A785-BD, BM5G6A785BD, BM5G-6A785-BC, BM5G6A785BC
• Fuel type: Petrol
• Part type: Pressure Valve Assembly
• Category: Oil Pumps & Parts

Purpose and function in the lubrication system

The engine breather with an oil separator in the Ford Fiesta Mk6 is responsible for the controlled discharge of gases from the crankcase and their redirection into the intake system. This limits the amount of oil entering the intake, keeping the air-fuel mixture more stable. In 1.6 petrol engines, this is crucial for smooth idling, proper throttle response, and maintaining the correct oil consumption level.

Design and fitment for Ford Fiesta Mk6

The presented oil separator is a component from the Oil pumps and parts category, designed specifically for the geometry and mounting layout of the Ford Fiesta Mk6 with a petrol engine. The breather construction is integrated, which facilitates installation at factory mounting points and ensures proper routing of the breather hoses. Proper fitment to the specific engine unit minimizes the risk of leaks and improper oil vapor discharge.

Benefits of a properly functioning oil separator

A functional oil separator in the crankcase ventilation system affects several key areas of operation:

• more stable engine operation at low RPM,
• reduction of excessive oil contamination in intake hoses,
• reduced risk of oil leaks in the seal areas,
• more predictable oil consumption in the petrol engine. For the user, this means easier diagnostics of potential faults, a cleaner intake system, and more predictable engine behavior during daily driving.

Product characteristics and condition

The offered engine breather with an oil separator comes from the Ford brand and is a used component, which allows for an economical repair while maintaining the original design. Choosing such a solution is particularly beneficial for maintenance repairs where a reasonable balance between cost and maintaining factory technical specifications is important. The component has an assigned OEM part number and interchangeable numbers, which facilitates verification of compatibility with a specific engine version and vehicle year.

Selection, installation, and technical support

Before installation, it is recommended to compare the shape of the housing, the arrangement of the ports, and the mounting method with the currently installed component to confirm full compatibility with the given petrol engine configuration. During replacement, it is also worth checking the condition of the vacuum hoses and the tightness of the connections, which will allow you to fully utilize the potential of a functional oil separator and reduce the risk of the return of symptoms related to improper operation of the ventilation system. 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 oil lines, pump housings, or additional modules related to the oil circuit, check the available parts in the Ford Oil pumps and parts category. For users considering the use of original aftermarket components for repairs related to the lubrication system and oil leaks, a guide describing when used components are a reasonable choice and how to assess the scope of service work may be helpful – details can be found in the article Operational faults and costs: how to repair a car using used auto parts?.