Audi A6 C6 Charge Air Cooling Pipe Air Cooler Pressure Line 3.0 TDI 4F0145731AD

Audi A6 C6 Charge Air Cooling Pipe Air Cooler Pressure Line 3.0 TDI is an intake system component responsible for efficiently routing compressed air between the turbocharger and the intercooler. Thanks to its precise geometry and fitment for the diesel unit, it ensures stable boost pressure and proper operation of the diesel engine. This solution is intended for users who expect consistency with the factory design and want to maintain the original performance characteristics of the powertrain.

Specifications and technical data

• SKU: 4F0145731AD
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0145731AD
• Substitutable numbers: 4F0145731AD, 4F0 145 731 AD
• Fuel type: Diesel
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The described pipe belongs to the Lines, hoses and pipes group and is a component of the charge air cooling system in the Audi A6 C6 generation with a 3.0 TDI diesel engine. Its task is to transport compressed air from the turbocharging system to the air cooler (intercooler) and further towards the intake manifold, while maintaining proper sealing and resistance to operating pressure.

A properly selected pipe in this area allows you to:

• maintain stable boost pressure across the entire rev range,
• reduce power drops resulting from leaks or pipe deformation,
• ensure proper cooperation with the diesel engine control system.

Compatibility with the 3.0 TDI diesel engine

The pipe has been designed to work with a Diesel powertrain, which means it is adapted to higher torque values and the operating parameters of the turbocharging system characteristic of diesel engines. The pipe's construction takes into account:

• resistance to elevated compressed air temperatures,
• operation under variable loads and frequent pressure changes,
• geometry adapted to the Audi A6 C6 engine bay.

As a result, the charge air cooling pipe helps maintain stable engine operating conditions, which translates into smooth operation, flexibility, and predictable throttle response.

Characteristics of the original Audi part

The item comes from the Audi brand, which in practice means maintaining factory design standards and compatibility with other intake system components. The original connection geometry, diameters, and shape of the pipe facilitate installation in the factory location without the need for modifications or the use of additional adapters.

As a part from the Lines, hoses and pipes group, this pipe has been designed for:

• reliable air routing under pressure,
• reducing the risk of abrasion and damage at typical contact points,
• maintaining appropriate rigidity while ensuring installation flexibility.

Condition, service application, and benefits of installation

The offered pipe is a used item, which makes it a reasonable choice for servicing the intake system in cars from the youngtimer segment, such as the Audi A6 C6. It is particularly useful in situations where the existing pipe shows signs of wear, cracking, delamination, or leaks resulting in power loss and engine control unit errors.

Replacing the charge air cooling pipe with a functional unit allows you to:

• restore correct boost pressure,
• reduce the risk of the engine entering limp mode,
• maintain the factory operating characteristics of the 3.0 TDI unit.

Intake system expansion and related parts

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 pressure lines, flexible intake hoses, or rigid air routing pipes, check the available parts in the Audi Lines, hoses and pipes category.

If you are interested in a broader context of using used components when refreshing cars from the 1998–2012 model years, including Audi models, it is worth reading the guide: The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 model years, which discusses practical modernization scenarios using parts from the secondary market.