Audi R8 42 Engine Fuel Injector Wiring Loom Harness Cable 4.2 FSI 079971627D

Audi R8 42 Engine Fuel Injector Wiring Loom Harness Cable 4.2 FSI is an original electrical system component designed for precise control of the fuel injectors in the 4.2 FSI unit. Thanks to its factory design, it ensures proper signal routing, stable power supply to the injectors, and compatibility with the factory Audi engine control unit. This is the solution for users who want to maintain the consistency of the powertrain with the manufacturer's original specifications.

Specifications and technical data

• SKU: 079971627D
• Mark: Audi
• Condition: Used
• OEM Part Number: 079971627D
• Substitutable numbers: 079971627D, 079 971 627 D
• Part type: Sensor
• Category: Parking Sensors

Purpose and function in the 4.2 FSI engine system

The fuel injector wiring harness in the Audi R8 with a 4.2 FSI engine is responsible for connecting the injectors to the engine control electronics. A properly selected harness:

• ensures stable transmission of control signals to each injector,
• maintains the correct firing order and logic of the cylinders,
• reduces the risk of electrical interference in the engine bay area,
• facilitates service and diagnostics thanks to factory-standard cable routing. Using an original injector harness is particularly important in high-power engines, where fuel dosing precision directly affects performance, engine smoothness, and the safety of the powertrain.

Advantages of using an original Audi harness

Choosing a factory fuel injector wiring harness for the Audi R8 4.2 FSI allows you to maintain engine operating parameters consistent with the manufacturer's design. Key benefits include:

• Full compatibility with the electrical system – connectors, cable lengths, and routing layout are matched to the specific engine configuration.
• Reduction of installation error risks – no need for modifications, soldering, or adapting non-original components.
• Stable injector operation under high loads – essential in FSI units operating across a wide RPM range.
• Easier diagnostics – the harness maintains the factory layout, which facilitates work for service centers using the manufacturer's documentation.

Installation and operational characteristics

The 4.2 FSI engine fuel injector wiring harness is a component prepared for operation in the demanding environment of the Audi R8 engine bay. The design provided by the manufacturer takes into account:

• insulation resistance to elevated temperatures in the vicinity of the cylinder heads and manifolds,
• cable routing that minimizes mechanical stress,
• use of factory connectors compatible with the injectors and the vehicle's electrical system. As a result, the harness can be used as a component to restore the proper operation of the fuel injection system following mechanical damage, overheating, or unauthorized interference with the electrical installation.

Product condition and service application

The offered fuel injector wiring harness is categorized under Parking sensors in the catalog structure; however, it functionally handles the fuel injection system in the Audi R8 4.2 FSI engine. The used product can be a cost-effective service solution in situations where:

• the original harness has suffered mechanical or thermal damage,
• there are issues with injector operation caused by breaks or interference in the installation,
• it is necessary to replace the harness with a component compliant with factory specifications without using aftermarket substitutes. This approach allows for maintaining the consistency of the powertrain with the solutions intended by the manufacturer, which is particularly important in sports cars of the Audi R8 class. If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as additional harnesses, connectors, or electrical installation elements, check the available parts in the Audi Parking sensors category.

Expert support and selection of original components

When working with electrical installations and components responsible for safety and comfort, it is worth using reliable sources of knowledge. In the context of deciding between new and used OEM components, an article describing when it pays to reach for original second-hand parts, how to assess their condition, and how to prepare them for installation—especially in the area of body-mounted components—can be helpful. You can find more practical tips in the material: Spider web on the windshield? Why it is better to choose a used original with the manufacturer's logo when replacing.