The Audi S8 D3 5.2 FSI V10 Quattro Fuel Injector Line Middle is an original gasoline fuel system component, designed for precise fuel delivery to the injectors in the V10 engine. This component has been specifically engineered for the sporty FSI unit, ensuring proper pressure and stable operation of the injection system.
Specifications and technical data
- SKU: 07L127509Q
- Mark: Audi
- Condition: Used
- OEM Part Number: 07L127509Q
- Substitutable numbers: 07L127509Q, 07L 127 509 Q
- Location on the vehicle: Left
- Fuel type: Petrol
- Category: Fuel Injectors
Purpose and Function in the Injection System
The middle fuel injector line operates in a critical area of the fuel rail, responsible for evenly distributing gasoline to the respective injector nozzles. In the 5.2 FSI V10 engine, this is crucial for:
- maintaining stable fuel pressure across the entire cylinder bank,
- precise gasoline metering at high RPMs and loads,
- preserving the V10 unit's smooth operation in both comfort and dynamic driving modes.
A properly selected line minimizes the risk of pressure drops, uneven engine running, and hot/cold start issues.
Compatibility with Audi S8 D3 Gasoline System
This part was developed with the sporty FSI V10 gasoline engine in the Audi S8 D3 with quattro drive in mind. The line's construction is adapted to the specific routing of the fuel system in this model, which translates to:
- correct fit with factory mounting points and brackets in the engine bay,
- preservation of the original line routing geometry, essential for safety and cooling,
- compatibility with factory injector nozzles in the gasoline system.
Its placement on the left side of the vehicle allows for seamless integration with the existing fuel system without the need for modifications.
Technical Characteristics and Installation
This line belongs to the injector nozzles category, as it directly interacts with the injection section, responsible for delivering fuel to the injectors. Its construction is prepared for operation with gasoline, meaning:
- resistance to typical operating pressures in FSI systems,
- material compatibility with gasoline and operational additives,
- dimensional stability across a wide range of engine operating temperatures.
As a used component, this line represents a sensible choice for servicing a high-performance V10 engine when you aim to maintain the original injection system's performance characteristics while controlling costs.
Service Application and Benefits of Replacement
Replacement of the middle fuel injector line is recommended, among other things, for symptoms such as:
- uneven engine operation within specific RPM ranges,
- performance drop during dynamic acceleration,
- fuel odor around the engine bay or signs of leaks.
Using an original line dedicated to the Audi S8 D3 5.2 FSI V10 Quattro helps restore correct fuel supply parameters, leading to stable engine operation, improved throttle response, and reduced risk of damage to other fuel system components.
Related Audi Injector Nozzles and Technical Materials
If you are looking for other components from the Audi injector nozzles category for your car, check out the Audi injector nozzles available in our store to select a complete service solution for your fuel system.
Although the described element works with a gasoline system, many principles of injection diagnostics are common across different engine types. It is worth familiarizing yourself with the guide diesel injector faults – symptoms, consequences, and diagnostics to better understand the importance of a functional injection system and the consequences of neglect.
When choosing components from the aftermarket, the guide comparing new and used car parts in terms of cost and quality may also be helpful, making it easier to make an informed service decision based on OEM parts.
