Audi A4 B9 A5 F5 Engine Oil Separator Breather Petrol 2.0 TFSI DDWA 06K103495AS

Audi A4 B9 A5 F5 Engine Oil Separator Breather Petrol 2.0 TFSI DDWA is a crankcase ventilation component designed for petrol engines, responsible for the controlled discharge of oil vapors and gases from the crankcase. As part of the Oil coolers and lines group, it supports stable engine operation by reducing blow-by and excessive oil contamination in the intake system. This is a practical solution for users looking to maintain the efficiency of the lubrication system in modern TFSI units.

Specifications and technical data

• SKU: 06K103495AS
• Mark: Audi
• Condition: Used
• OEM Part Number: 06K103495AS
• Substitutable numbers: 06K103495AS, 06K 103 495 AS, 06K 638 A, 06K638A
• Fuel type: Petrol
• Category: Engine Oil Coolers & Lines

Function and role in the engine system

The breather – oil separator in the 2.0 TFSI petrol 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,
• stabilizing pressure in the crankcase under various engine loads,
• reducing excessive oil consumption resulting from uncontrolled blow-by,
• supporting smooth engine operation across the entire rev range.

Thanks to a properly functioning separator, the lubrication system remains cleaner, and components interacting with the breather – such as lines, connectors, and intake channels – are less prone to deposit buildup.

Purpose and compatibility

The presented Audi A4 B9 A5 F5 Engine Oil Separator Breather has been designed for TFSI petrol units, where precise control of oil vapors is essential for engine durability. The component belongs to a group of parts mounted directly in the cylinder head or valve cover area, working in conjunction with breather lines and the intake system.

The product comes from Audi, which ensures factory-spec connection geometry and compatibility with original mounting points. This is important for system tightness and proper interaction with other components in the Oil coolers and lines group.

Characteristics of the used component

The offered oil separator is a used part, which in practice means an economical way to repair the breather system while maintaining the original design. For this type of component, the following are particularly important:

• maintaining proper flow through channels and separation chambers,
• correct operation of internal valves responsible for regulating gas flow,
• proper fitment to factory lines and connectors in the petrol engine.

Replacing a worn or leaking breather with a functional unit helps reduce issues such as unstable idle, increased smoke, or excessive oil contamination of the intake system.

Benefits of using a functional oil separator

By installing a functional breather – oil separator in a 2.0 TFSI engine, the user gains a number of practical operational benefits:

• more stable engine operation thanks to proper pressure regulation in the crankcase,
• reduced tendency for carbon deposits to accumulate in intake channels,
• better operating conditions for the lubrication system under high loads and temperatures,
• more predictable engine oil consumption.

This is particularly important in modern turbocharged petrol engines, where the breather system has a direct impact on engine refinement and long-term reliability.

Connection to the oil cooling system and additional materials

The breather – oil separator works with components from the Oil coolers and lines group, indirectly affecting the operating conditions of the engine oil. Proper vapor discharge and pressure stabilization support cooling and lubrication efficiency, which is significant especially in high ambient temperatures. If you want to better understand how high temperatures affect the cooling and lubrication system and when it is worth choosing used components, check out our guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.

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