Audi A3 8V Q3 8U Engine Oil Separator Breather Petrol 2.0 TFSI CULB 06K103495AG

Audi A3 8V Q3 8U Engine Oil Separator Breather Petrol 2.0 TFSI CULB is an original crankcase ventilation system component designed for 2.0 TFSI petrol engines. Thanks to its precise construction, the separator stabilizes engine operation, reduces oil intake into the intake system, and supports the proper functioning of the lubrication system. This solution is particularly important for urban driving and dynamic performance, where a fully functional breather system has a direct impact on engine refinement.

Specifications and technical data

• SKU: 06K103495AG
• Mark: Audi
• Condition: Used
• OEM Part Number: 06K103495AG
• Substitutable numbers: 06K103495AG, 06K 103 495 AG
• Fuel type: Petrol
• Category: Engine Oil Coolers & Lines

Purpose and technical function

The presented oil separator is dedicated to the 2.0 TFSI petrol engine family, where it is responsible for the controlled discharge of gases from the crankcase and the separation of oil mist. In practice, this means:

• reducing the amount of oil entering the intake system,
• more stable crankcase pressure,
• more predictable lubrication system operation under various loads,
• reducing the risk of carbon deposit buildup in the intake.

In TFSI petrol engines, a properly functioning breather is essential for maintaining smooth engine operation, which is why a functional oil separator is an important element of preventive maintenance.

Construction and engine system integration

The separator was designed by the Audi brand as a component precisely matched to the cylinder head architecture and lubrication system. This means:

• factory-fit compatibility with mounts and vacuum ports,
• seamless integration with the factory engine management system,
• preservation of the original engine performance parameters.

Thanks to a design consistent with the manufacturer's specifications, installation requires no modifications or adaptations, and the entire ventilation system retains its factory characteristics. This is particularly important in modern petrol engines, where the breather system is linked to engine control unit maps.

Condition, selection, and practical application

The item belongs to the Oil coolers and lines category, which highlights its connection to the oil circuit and the monitoring of engine operating conditions. As a used part, it offers an attractive solution for users looking for a technically sound and cost-effective way to restore the full efficiency of the ventilation system.

When selecting, it is recommended to verify compatibility by the OEM number and compare the design with the currently installed component. This approach minimizes the risk of error and ensures full compatibility with the specific petrol engine version.

Benefits of installing a functional oil separator

Replacing a worn-out breather with a functional separator in an Audi A3 8V or Q3 8U brings measurable operational benefits:

• more stable idle speed,
• reduction of blow-by and unwanted noises from the valve cover area,
• reduced risk of leaks resulting from overpressure in the crankcase,
• better operating conditions for engine oil in the long term.

Combined with regular service maintenance, installing a functional separator supports safe and predictable operation of the petrol engine, which is especially important in cars used intensively on a daily basis.

Connection to the oil cooling system and technical knowledge

The crankcase ventilation system works in conjunction with the oil circuit and affects the thermal conditions of the engine. For a better understanding of the relationship between gas discharge, oil temperature, and engine durability, it is worth checking out our guide: Engine cooling system – overheating, repair, and used radiators. The article explains in an accessible way how components related to cooling and lubrication affect engine longevity.

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