Audi A7 4G 3.0 TDI Air Charge Intercooler Hose Pipe Line Left N/S 4G0145673R

Audi A7 4G 3.0 TDI Air Charge Intercooler Hose Pipe Line Left N/S is an original intake system component designed for diesel engines. It ensures stable routing of compressed air between the turbocharger, intercooler, and intake manifold, which translates into proper operation of the 3.0 TDI unit and the maintenance of factory parameters. This solution is dedicated to users who expect a secure fit and compatibility with the original Audi design.

Specifications and technical data

• SKU: 4G0145673R-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0145673R
• Substitutable numbers: 4G0145673R, 4G0 145 673 R, 0281002977, 0 281 002 977
• Location on the vehicle: Left
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The presented hose belongs to a group of components responsible for transporting compressed air in the diesel engine's forced induction system. Its task is to provide a tight and stable connection between intake system components so that boost pressure is maintained at the level specified by the manufacturer, without flow losses or leaks.

This element is mounted on the left side of the vehicle, in the engine bay area, where it operates under elevated temperatures and variable pressure. The appropriate geometry and diameter of the hose are crucial for maintaining proper airflow, which affects engine refinement, dynamics, and combustion stability.

Construction and fit for Audi A7 4G 3.0 TDI

The hose has been designed specifically for the Audi A7 4G generation model with a 3.0 TDI engine, offering factory-fit compatibility with mounts and routing in the engine bay. Properly shaped sections, integrated connectors, and prepared spots for clamps and fittings allow for installation without modifications, following the factory hose routing path.

As an original element from the Hoses, pipes, and lines group, the hose works in harmony with other Audi intake system components, minimizing the risk of mismatch, stress, or incorrect positioning. This is particularly important in turbocharged engines, where any leaking or poorly routed section can cause power loss, ECU errors, or the engine entering limp mode.

Operating characteristics in a diesel engine

The 3.0 TDI engine operates under higher pressure loads than naturally aspirated units, which is why the intercooler hose must be resistant to variable boost pressure and flow pulsations. The design of this component is adapted to the specifics of the diesel unit, helping to maintain:

• stable boost air pressure across the entire rev range,
• proper cooperation with the intercooler and turbocharger,
• the correct temperature of the air entering the cylinders.

As a result, the intake system maintains parameters close to factory specifications, and the engine control unit can precisely manage fuel dosage and boost pressure, which translates into predictable performance and correct throttle response.

Condition, service application, and benefits of installation

The offered hose is a used part, making it an attractive service solution for users looking for original components at a reasonable price. Replacing a worn or damaged intercooler hose with a functional OEM part allows you to:

• limit the risk of power drops resulting from intake system leaks,
• reduce the possibility of boost pressure errors appearing in the ECU,
• maintain compliance with the factory design of the Audi A7 4G 3.0 TDI intake system.

This solution is particularly useful in situations where symptoms such as air hissing under load, oil traces on intake hoses, or a decrease in vehicle dynamics occur.

Selection support and additional information

When selecting an intercooler hose, it is worth paying attention to compatibility with the specific diesel engine version and its location on the vehicle. If necessary, you can refer to the manufacturer's markings included in the technical specifications to ensure that the part will work correctly with your existing intake system.

If you want to better understand how using original used components affects repair time and workshop workflow, check out the article: Availability of car parts on demand vs. repair time – how used OEM parts shorten workshop stays?.

If you are planning a comprehensive repair or upgrade of the intake system area in your Audi and need other elements from the same group, such as flexible hose sections, rigid pipes, or forced induction connectors, check out the available parts in the Audi Hoses, pipes, and lines category.