Audi A4 B9 Q5 FY 2.0 TDI Diesel Fuel Injector Rail Line 05L130089

Audi A4 B9 Q5 FY 2.0 TDI Diesel Fuel Rail is a fuel system component designed for diesel engines, responsible for the stable distribution of fuel to the injectors. A properly selected rail ensures correct operating pressure, which translates to smooth engine operation and safe utilization of the 2.0 TDI engine's potential.

Specifications and technical data

• SKU: 05L130089
• Mark: Audi
• Condition: Used
• OEM Part Number: 05L130089
• Substitutable numbers: 05L130089, 05L 130 089
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role in the Injection System

The fuel rail operates at the front of the engine compartment, in close proximity to the injectors. Its function is to store fuel under high pressure and to supply all cylinders evenly, which is crucial for the engine's smooth running, exhaust emissions, and diesel fuel consumption.

In Diesel engines, such as the 2.0 TDI used in the Audi A4 B9 and Q5 FY, the stable operation of the fuel rail influences:

• maintaining proper fuel pressure across the entire engine load range,
• precise diesel fuel dosing by the injectors,
• reducing vibrations and uneven running during acceleration and idling.

Compatibility with Audi Diesel Engines

The presented rail is designed to work with the fuel injection system of Audi diesel engines. Using a component from the same design family as the factory part helps maintain the operating parameters specified by the vehicle manufacturer, including cold start characteristics, throttle response, and idle stability.

Thanks to its original geometry and connections, the rail can be installed in place of the factory component without the need for modifications to the fuel system or engine bay mounts.

Condition, Verification, and Benefits of Using a Used Part

This component is from a dismantled vehicle and is offered as a used part, allowing for economical repair of the injection system while maintaining a design consistent with the factory solution. Such components are often chosen for:

• diagnosing injection system faults (fuel pressure problems, control unit errors),
• repairs after mechanical damage to the front of the vehicle,
• restoring the completeness of the common rail system after previous modifications or incorrect repairs.

Using an original aftermarket fuel rail allows for the preservation of the system's factory operating parameters, while reducing costs compared to a new component.

Importance of a Proper Fuel Rail for Safety and Durability

A functional fuel rail directly impacts the safe operation of the fuel system. Incorrect pressure or leaks can lead to:

• loss of power and jerking during acceleration,
• increased smoke and worsened exhaust emissions,
• accelerated wear of injectors and other common rail system components.

To better understand the connection between the fuel rail and injector operation, it is worth reading the article discussing typical symptoms and consequences of neglecting the fuel system: diesel injector faults – how to recognize them and what are the consequences of neglecting them.

Selection and Other Audi Injector Nozzles

When selecting a fuel rail for a specific engine version and body year, it is recommended to verify compatibility by OEM number or interchangeable numbers and to compare the connection configuration with the dismantled element. If in doubt, the guide on identifying parts by manufacturer markings may be helpful: how to choose the right car part by VIN and OEM number.

If you are looking for other components in the injector nozzles category for this brand, check the Audi injector nozzles available in our assortment to complete the entire fuel system with a consistent specification.