Audi S4 B8 Engine Water Coolant Pipe Hose Left N/S Outer 3.0 TFSI 8K0145931D

Audi S4 B8 Water Hose Pipe Left Outer 3.0 TFSI is an original cooling system component from the Cooling System Hoses and Pipes category, designed for the left side of the engine bay. The carefully designed hose routing ensures stable coolant flow and helps maintain the correct temperature of the 3.0 TFSI unit, leading to safe and predictable vehicle operation.

Specifications and technical data

• SKU: 8K0145931D
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0145931D
• Substitutable numbers: 8K0145931D, 8K0 145 931 D
• Location on the vehicle: Left
• Part type: Hose
• Category: Coolant Hoses

Purpose and Function in the Cooling System

This water hose is specifically designed for use in the Audi S4 B8 generation with the 3.0 TFSI engine and operates on the left side of the vehicle. It is responsible for reliably directing coolant between system components, which is crucial for maintaining stable engine operating temperature, protecting against overheating, and preserving the proper thermal efficiency of the entire powertrain.

Thanks to its factory shape and fit, the hose works with original mountings and other cooling system components, minimizing the risk of stress, leaks, and improper positioning in the engine bay.

Construction and Mounting Fit

The hose belongs to the group of elements responsible for transporting coolant, so its geometry and connection diameters are adapted to the original Audi cooling system spigots. The appropriately profiled water pipe facilitates installation at the original mounting points, without the need for modifications or additional adapters.

Its placement on the left side of the vehicle allows for precise routing along the factory-intended path, maintaining adequate distance from hot engine components and moving accessory parts. This fit reduces the risk of abrasion, material overheating, and unwanted vibrations.

Benefits of Using an Original Audi Hose

Using an original Audi water hose in the S4 B8 cooling system offers a number of practical benefits:

• secure fit with factory spigots and brackets in the engine bay,
• stable coolant flow in the critical area on the left side of the vehicle,
• maintenance of the manufacturer's designed cooling system operating characteristics,
• reduced risk of leaks resulting from the poor fit of universal aftermarket parts.

For the 3.0 TFSI unit, which operates under significant thermal load, a correctly selected water hose directly impacts the durability of the engine, turbocharger, and other components that interact with the cooling system.

Condition, Verification, and Service Application

This part is a used item from disassembly, offered to optimize repair costs while maintaining original manufacturer specifications. This type of water hose is suitable for both standard replacement of worn components and for comprehensive cooling system rebuilds after an engine failure or overheating.

When performing service work on the cooling system, it is advisable to check the completeness of the installation, the condition of other hoses, the tightness of connections, and proper bleeding after installation. It is also good practice to periodically visually inspect hoses for signs of fluid, cracks, or deformation.

More About Cooling Systems and Hose Selection

If you want to better understand how a properly functioning cooling system affects engine longevity and what symptoms might indicate coolant flow problems, check out the article: Engine Cooling System – Overheating, Repair, and Used Radiators. You will find practical tips there to help you assess component condition and plan repairs consciously.

If you are looking for other elements from the Cooling System Hoses and Pipes category dedicated to this brand, check out the Audi cooling system hoses and pipes available in our store to select components that are consistent in construction and mounting.