Audi R8 42 Radiator Coolant Hose Radiator Pipe Line Tube Left N/S 079121131BA

Audi R8 42 Radiator Coolant Hose Radiator Pipe Line Tube Left N/S is an original cooling system component from Audi, designed for installation on the left side of the vehicle. Engineered as part of the factory system, it ensures stable coolant flow between the radiator and other components, supporting safe engine thermal conditions.

Specifications and technical data

• SKU: 079121131BA
• Mark: Audi
• Condition: Used
• OEM Part Number: 079121131BA
• Substitutable numbers: 079121131BA, 079 121 131 BA
• Location on the vehicle: Left
• Category: Crankshafts

Purpose and function in the cooling system

The left coolant hose in the Audi R8 42 series is responsible for the controlled flow of coolant within the radiator and adjacent sub-assemblies. A correctly selected and installed component:

• maintains the integrity of the cooling circuit under thermal and pressure loads,
• reduces the risk of engine overheating,
• ensures stable engine operating conditions during dynamic driving,
• minimizes pressure losses in the fluid circuit. Thanks to a design consistent with factory Audi standards, the hose maintains the correct routing geometry, which facilitates installation and reduces stress throughout the entire cooling system.

Original origin and fitment

As an Audi group component, the hose was developed for precise fitment within the cooling system of the Audi R8 42. This means:

• retention of factory mounting and routing points,
• compatibility with original connectors and clamps,
• appropriate diameter and shape ensuring proper fluid flow. Such fitment reduces the need for modifications, shortens service time, and decreases the risk of leaks resulting from the improper installation of universal replacements.

Characteristics of the used component

The hose is offered as a used part, which allows for an economical repair of the cooling system while maintaining the manufacturer's original specifications. A used OEM component is a good solution when:

• you want to maintain system consistency with other factory elements,
• you are looking for a reasonable compromise between cost and quality,
• you need a part with parameters consistent with Audi service documentation. Choosing an original hose from dismantling reduces the risk of fitment issues that often occur with cheaper replacements with imprecise dimensions.

Installation on the left side of the vehicle

The placement on the left side of the vehicle is important both for the correct routing of the hose and for the safe operation of the entire system. Proper selection of the installation side:

• ensures compliance with the factory cooling system layout,
• eliminates the risk of rubbing against other components or body parts,
• facilitates future service and diagnostics. Thanks to this, the hose can operate under the conditions intended by the manufacturer, without excessive mechanical and thermal stress.

Service expansion within the same group

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 additional hoses, pipes, or components working with the crankshaft system, check the available parts in the Audi Crankshafts category.

Technical support for repairs using dismantled parts

When planning repairs using used OEM elements, it is worth knowing the best practices for selecting and installing such components, especially in the context of safety and durability. An extended discussion of issues related to post-accident repairs, service procedures, and the conscious choice of parts from dismantling can be found in the article Bodywork and chassis – post-accident repairs using dismantled parts.