Audi S5 8T Fuel Injection Injector Rail Line Left N/S 4.2 Petol 079133315E

Audi S5 8T fuel rail injector left 4.2 petrol is an original fuel system component, designed for precise operation in the V8 engine. Thanks to its factory fit for the 4.2 petrol unit, it ensures stable cylinder supply and proper cooperation with the injectors. This is a practical solution for users who want to maintain the consistency of the injection system and keep engine operating parameters at the correct level.

Specifications and technical data

• SKU: 079133315E
• Mark: Audi
• Condition: Used
• OEM Part Number: 079133315E
• Substitutable numbers: 079133315E, 079 133 315 E
• Location on the vehicle: Left
• Part type: Fuel Rail (Ramp)
• Category: Additional Fuel Injection Parts

Purpose and function in the injection system

The fuel rail is responsible for the even distribution of fuel to the injectors, which directly affects engine smoothness, performance, and fuel consumption. For the 4.2 petrol unit in the Audi S5 8T, maintaining the correct pressure and flow stability is particularly important so that the injection system can operate within the range designed by the manufacturer.

This component is part of the Other injection system parts category, meaning it works with other fuel supply components – the pump, lines, and injectors – to create a cohesive, functional system.

Vehicle placement and fitment

The presented fuel rail is intended for the left side of the vehicle, which is important for V-engines where the injection system is divided into two cylinder banks. Correctly selecting the mounting side helps avoid problems with fuel line routing, collisions with other components, and facilitates servicing.

Thanks to its design conforming to Audi's factory solutions, installation is predictable – mounting points, geometry, and connections are prepared to work with the original engine equipment. This is a beneficial solution for workshops and users who expect seamless integration with the existing system.

Product characteristics and condition

The fuel rail comes from the Audi brand offering and is an OEM part, which helps maintain the factory operating parameters of the engine. The product is used, allowing for an economical restoration of the injection system's efficiency while maintaining the original design specification.

Choosing a used OEM component is particularly attractive for advanced petrol engines, where component fitment is crucial for the correct operation of the engine control unit, injection maps, and diagnostic systems.

Benefits of using an original fuel rail

• maintaining the factory fuel system geometry in the 4.2 petrol engine,
• consistent cooperation with injectors and other injection system components,
• easier diagnostics and servicing due to original Audi design,
• a reasonable compromise between repair cost and quality of execution,
• reduced risk of fitment issues compared to aftermarket parts.

New or used fuel rail – how to choose?

For components like a fuel rail in a petrol engine, it's worth considering the cost-benefit ratio. A used OEM part often allows you to maintain the original engine operating characteristics at a lower financial outlay than a new part. If you want to compare the advantages of new and used components, you'll find a practical comparison in the article: New or used? A comparison of car parts costs and quality.

Other Audi injection system parts

If you are also looking for other Other Audi injection system parts for your car, check out the Other Audi injection system parts available in our store to select components that fit your specific engine configuration.

To better understand how original components influence the character of this brand's cars, you can also read the material dedicated to preserving the specifics of models from Ingolstadt: Audi and pure emotion – how used parts help maintain the brand's DNA.