Audi A4 B8 1.8 TFSI CJEB Turbocharger Oil Pipe Return Line 06L145735B

Audi A4 B8 1.8 TFSI CJEB Turbocharger Oil Return Line is an original part from the Turbochargers and Parts category, designed for the boost system in the 1.8 TFSI CJEB gasoline engine. It ensures controlled return of lubricating oil from the turbocharger to the lubrication system, which translates to stable engine operation and reduced risk of leaks.

Specifications and technical data

• SKU: 06L145735B
• Mark: Audi
• Condition: Used
• OEM Part Number: 06L145735B
• Substitutable numbers: 06L145735B, 06L 145 735 B
• Category: Turbos & Parts

Function and Role in the Boost System

The turbocharger oil return line in the Audi A4 B8 1.8 TFSI CJEB is responsible for the safe drainage of heated oil from the turbine housing to the oil pan or further into the lubrication system. A correctly selected and sealed component:

• stabilizes oil pressure within the turbocharger,
• reduces the risk of turbocharger bearing overheating,
• minimizes the possibility of leaks at the connections,
• supports maintaining cleanliness in the engine bay.

Thanks to this, the boost system maintains proper operating parameters, and the turbocharger can operate within the load range specified by the manufacturer.

Why Choose an Original Audi Line

Using an oil return line from the same production line as factory Audi components ensures compatibility with the lubrication and boost system design. An original part:

• has precisely matched connection geometry for the turbocharger and engine block,
• maintains the correct oil flow cross-section,
• is made from materials suitable for high-temperature operation and contact with engine oil.

Such a fit reduces the need for assembly modifications and lowers the risk of leaks, which is particularly important in turbocharged engines sensitive to lubrication quality.

Characteristics of a Used Part

The offered line belongs to the group of used original Audi parts, which in practice means a favorable combination of OEM quality with an attractive purchase price. For many users, this is a reasonable compromise between investing in a new part and maintaining high compatibility with the vehicle's factory specifications.

When selecting a used oil return line, it is worth paying attention to:

• the condition of the working surfaces around the connections,
• the absence of visible shape deformations,
• overall system sealing after installation (test after engine start-up).

Purpose and Application in Audi A4 B8 1.8 TFSI CJEB

The line has been designed to work with the turbocharger in the 1.8 TFSI CJEB engine used in the Audi A4 B8. Proper routing of the oil line relative to the exhaust manifold, engine block, and accessories helps to avoid unwanted contact with high-temperature components and moving parts in the engine bay.

In practice, replacing the oil return line is recommended, among other things, during:

• turbocharger overhaul or replacement,
• detection of oil leaks around the turbine,
• boost system upgrades when restoring factory line routing is required.

System Expansion – Audi Turbochargers and Parts

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other parts from the same category, such as turbocharger housings, oil lines, or small mounting accessories, check the available parts in the Audi Turbochargers and Parts category.

New or Used – How to Choose the Right Part

When choosing a turbocharger oil return line, many users wonder whether a new or used OEM part is a better solution. The differences concern not only the price but also the expected durability and installation method. To make an informed decision and compare the advantages of both solutions, it is worth reading the guide: New or Used? A Comparison of Car Part Costs and Quality.

Summary

The Audi A4 B8 1.8 TFSI CJEB Turbocharger Oil Return Line is a functional component of the turbocharger lubrication system that helps maintain stable operating conditions for a turbocharged engine. Choosing an original component from the Turbochargers and Parts category supports correct assembly geometry, proper oil flow, and reduces the risk of leaks in critical areas of the powertrain.