Oil Separator Audi S4 B9 S5 5F 3.0 TFSI V6 Breather Valve 06M103515F

Oil Separator Audi S4 B9 S5 5F 3.0 TFSI V6 Breather Valve is a specialized component of the crankcase ventilation system, designed by Audi to ensure stable operation of the 3.0 TFSI V6 engine. It is responsible for effectively separating oil mist from gases before they return to the intake, which promotes cleaner combustion and reduces carbon deposit buildup in the engine unit.

Specifications and technical data

• SKU: 06M103515F
• Mark: Audi
• Condition: Used
• OEM Part Number: 06M103515F
• Substitutable numbers: 06M103515F, 06M 103 515 F
• Category: Engine Oil Coolers & Lines

Function of the oil separator in the 3.0 TFSI V6 engine

The oil separator breather in the 3.0 TFSI V6 engine plays a key role in the crankcase ventilation system. Its tasks include:

• separating oil particles from gases before they return to the intake system,
• reducing oil consumption by decreasing the amount of oil sucked into the cylinders,
• stabilizing pressure in the crankcase, which promotes smooth engine operation,
• reducing the risk of deposits forming in the intake manifold and on the valves.

Thanks to a properly functioning separator, the lubrication system remains cleaner, and the engine maintains consistent performance parameters across a wide range of loads.

Construction and compatibility with Audi S4 B8 / S5 8T models

The presented oil separator was developed as a factory component for the 3.0 TFSI V6 unit used in Audi S4 B8 and S5 8T models. This means that:

• the geometry of the ports and mounts is adapted to the stock intake system and valve cover,
• the internal design of the channels and separation chambers is optimized for the gas flow characteristics of this specific engine,
• the entire unit works with the factory engine management system without the need for software modifications.

Such compatibility translates into predictable behavior of the ventilation system, which is particularly important in high-performance turbocharged units like the 3.0 TFSI V6.

Benefits of using an original oil separator

Using an original oil separator in Audi cars with the 3.0 TFSI V6 engine allows for maintaining performance parameters close to factory specifications. In practice, this means:

• more stable pressure in the lubrication system under various loads,
• reduced tendency for oil blow-by into the intake,
• better engine refinement at high RPMs,
• reduced risk of errors related to the breather system.

For users who drive their Audi S4 B8 or S5 8T dynamically, maintaining a functional oil separator is an important element of engine care and long-term reliability.

Component condition and service application

The offered oil separator breather is a part from the Oil coolers and lines category and comes from disassembly. This type of part can be used both for a standard replacement of a worn-out separator and for broader service work within the lubrication and crankcase ventilation system.

In practice, installation involves replacing the existing component with one of matching specifications, while following the service procedures provided for the 3.0 TFSI V6 engine. Proper selection of the component according to the manufacturer's markings allows for maintaining compatibility with other engine unit sub-assemblies.

Oil separator vs. cooling system and engine operating temperature

A functional oil separator indirectly supports stable engine operating temperature because it limits the amount of excess oil entering the combustion chamber and intake system. Cleaner combustion makes it easier to maintain the correct thermal load on the engine, which is especially important in powerful turbocharged units.

If you want to better understand the relationships between the lubrication system, oil cooler, and engine operating temperature, it is worth reading an article describing the practical aspects of diagnostics and repair – you will find them in the material Engine cooling system – overheating, repair, and used radiators.

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as oil lines, oil coolers, or additional lubrication system components, check the available parts in the Audi oil coolers and lines category.