Audi A3 8V A4 B9 Engine Oil Separator Breather Petrol 2.0 TFSI DNUE 06K103495BL

Audi A3 8V A4 B9 Engine Oil Separator Breather Petrol 2.0 TFSI DNUE is a crankcase ventilation system component designed for petrol engines, which stabilizes the circulation of oil vapors and gases in the crankcase. Thanks to its precise OEM design, it ensures proper ventilation of the power unit, which promotes clean engine operation and reduces the risk of unwanted leaks. This is a practical solution for Audi users who want to maintain the efficiency of the lubrication system in the 2.0 TFSI engine.

Specifications and technical data

• SKU: 06K103495BL
• Mark: Audi
• Condition: Used
• OEM Part Number: 06K103495BL
• Substitutable numbers: 06K103495BL, 06K 103 495 BL
• Fuel type: Petrol
• Category: Engine Oil Coolers & Lines

Purpose and function in a petrol engine

The breather – oil separator in the 2.0 TFSI engine is responsible for separating oil vapors from gases before they return to the intake system. In TFSI petrol units, this is crucial for:

• maintaining stable pressure in the crankcase,
• limiting oil blow-by into the intake,
• reducing carbon deposit buildup in the intake ports,
• more uniform engine operation across the entire rev range.

A properly functioning separator supports effective lubrication and oil cooling, which is particularly important during the dynamic operation typical of TFSI units.

Integration with the lubrication system and the Oil coolers and lines category

The presented element belongs to the Oil coolers and lines group, i.e., components responsible for controlling the circulation and condition of engine oil. The breather – oil separator works with oil channels and breather lines, influencing:

• stability of oil operating parameters under various load conditions,
• reduction of oil losses resulting from excessive vapor suction,
• maintaining more predictable operating conditions for the turbocharger and lubrication system.

As a result, it constitutes an important link in the entire oil circuit, supporting both the durability of the power unit and the repeatability of its performance.

Benefits of using an original Audi component

The original oil separator designed for Audi A3 8V and A4 B9 models has been engineered for full compatibility with the factory engine architecture. This translates into:

• precise fitment to mounting points and breather lines,
• proper cooperation with factory engine management,
• preservation of the factory operating parameters of the petrol unit.

For the user, this means trouble-free installation and predictable operation without the need for system modifications. Choosing an original component is particularly important in modern direct-injection engines, where the breather system has a real impact on engine refinement and oil consumption.

Characteristics of the used part

The offered breather – oil separator is a used part, which allows combining OEM functionality with a more attractive purchase cost. This is a solution for drivers who want to restore the efficiency of the breather system in their Audi while maintaining a reasonable service budget. A used element of this class will work particularly well in situations where the existing separator shows signs of wear, such as unstable idle speed or increased oil consumption.

Technical support and additional materials

During the summer, the lubrication and oil vapor extraction system operates at elevated temperatures, which is directly related to the condition of the cooling system. To better understand how high temperatures affect the entire cooling assembly and components working with engine oil, it is worth checking out the 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 the engine area in your Audi and need other elements from the same group, such as oil lines, breather components, or parts working with the oil circuit, check out the available parts in the Audi oil coolers and lines category.