Audi A4 8K A5 8T 3.0 TDI Turbo Intercooler Air Intake Pipe Hose Line 8K0145673AB

Audi A4 8K A5 8T 3.0 TDI Turbo Intercooler Air Intake Pipe Hose Line is an original turbocharging system component that ensures stable routing of compressed air between the turbocharger and the intercooler. Thanks to its factory geometry and precise fit for the specific 3.0 TDI unit, it guarantees proper flow, airtightness, and correct boost pressure, which translates into safe engine operation. It is a practical choice for users looking for a proven, used OEM part instead of unreliable replacements.

Specifications and technical data

• SKU: 8K0145673AB
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0145673AB
• Substitutable numbers: 8K0145673AB, 8K0 145 673 AB
• Category: Intercoolers

Function in the turbocharging and air cooling system

The intake pipe works with the turbocharger and the intercooler, directing compressed air to the intercooler. A correctly selected component:

• maintains the proper airtightness of the turbocharging system,
• ensures stable airflow under high load of the 3.0 TDI engine,
• reduces pressure drops, which supports turbocharging efficiency,
• helps maintain the proper temperature of the air feeding the cylinders.

As a result, the engine maintains its nominal operating parameters, and throttle response remains predictable and consistent.

Why choose an original Audi pipe

The original component from the Audi brand is designed specifically for the engine bay geometry of the A4 8K and A5 8T with the 3.0 TDI unit. In practice, this means:

• a secure fit to factory mounts and connector diameters,
• retention of proper flexibility and resistance to operating temperatures,
• lower risk of leaks compared to random replacements.

A used OEM pipe is a reasonable compromise between cost and quality – it allows you to restore the correct operation of the turbocharging system without interfering with the factory design.

Application and part selection by numbers

The presented pipe is intended for Audi A4 B8 (8K) generation models and Audi A5 8T with a 3.0 TDI engine, which use a factory turbocharging system with an intercooler. When selecting the component, it is worth using the manufacturer's markings and interchangeable numbers to precisely verify compatibility with a specific equipment version.

If you want to learn more about how to select original used Audi components by manufacturer markings and reference numbers, the following article will be helpful: Audi five-cylinder engine and selecting used OEM parts by numbers.

Condition, installation, and operation

The item is offered as a used part, which means it comes from disassembly and was previously used in a vehicle. Before installation, a standard visual inspection for any signs of operational wear is recommended to ensure trouble-free operation of the turbocharging system after replacement.

Replacing the intake pipe is a standard service procedure within the turbocharging and air cooling system. Properly performed installation helps reduce the risk of power loss, smoke, or errors related to boost pressure.

Connection to the cooling system and engine durability

A functional intake pipe working with the intercooler has a direct impact on the temperature of the air sucked in by the engine. Leaks or damage in this area can lead to improper operation of the power unit, increased thermal load, and accelerated wear of components.

If you want to better understand how the entire cooling and charge air cooling system affects the lifespan of the power unit, it is worth checking out the guide: engine cooling system – overheating, repair, and the role of used radiators.