Audi Q7 4L Turbocharger Oil Pipe Hose Return Left N/S 4.2 TDI 057145735S

The Audi Q7 4L 4.2 TDI Left Turbocharger Oil Return Hose is a genuine turbocharger and parts component designed for the turbocharging system in the 4.2 TDI diesel engine. This hose ensures a factory fit and proper lubrication oil return from the left turbocharger, which is crucial for the durability of the entire system.

Specifications and technical data

• SKU: 057145735S
• Mark: Audi
• Condition: Used
• OEM Part Number: 057145735S
• Substitutable numbers: 057145735S, 057 145 735 S
• Location on the vehicle: Left
• Category: Turbos & Parts

Purpose and function in the supercharging system

The left turbocharger oil return line is responsible for returning lubricating oil from the turbine housing to the engine lubrication system. A stable oil flow is essential to limit overheating of the turbocharger bearings and reduce the risk of leaks and oil pressure drops.

The element was designed specifically for the 4.2 TDI engine in the Audi Q7 4L, thanks to which:

• ensures proper oil flow on the left side of the turbocharger,
• maintains the tightness of the lubrication system under high temperature and pressure conditions,
• minimizes the risk of incorrect lubrication of the rotor and bearings.

Fits Audi Q7 4L 4.2 TDI

As a turbocharger and parts component, the hose is factory-fitted to the geometry of the Audi Q7 4L engine compartment. Its shape and location on the left side of the vehicle allow for hassle-free installation at the original mounting points, without the need for modifications.

Original Audi origin means:

• compliance with factory quality and safety standards,
• correct fit with the left turbocharger and engine block,
• maintaining the oil flow path designed by the manufacturer.

Used condition and the benefits of choosing OE parts

The hose is offered in used condition, reducing repair costs while maintaining the original manufacturer's specifications. Many Audi Q7 4L 4.2 TDI owners consider this a reasonable compromise between price and quality, especially when considering the robust metal components.

Choosing an original oil return line instead of an aftermarket replacement includes:

• certainty of compatibility with the turbocharger and lubrication system,
• less risk of assembly problems,
• maintaining engine operating parameters in line with the manufacturer's assumptions.

Professional installation and operation

Due to the importance of the hose for turbocharger operation, installation by an experienced service center is recommended, following the manufacturer's procedures. During replacement, it's worth paying attention to:

• cleanliness of oil channels and contact surfaces,
• condition of seals and fastening elements,
• correct cable routing on the left side of the drive unit, without tension or kinks.

A correctly installed oil return line supports stable operation of the turbocharger, reduces the risk of leaks and helps maintain proper lubrication conditions in the 4.2 TDI engine.

Other Audi turbocharger hoses and selection by OEM numbers

If you are looking for other turbocharger hoses for Audi, check out the dedicated category where you will find a wide selection of turbocharger system components for this brand: turbocharger hoses for Audi .

When selecting turbocharger components, it's important to use OEM and reference numbers to avoid assembly errors. Practical tips for verifying part compatibility by number can be found in the guide: Buying parts online without risk – 5 ways to verify components by OEM numbers .