Audi A4 B8 A5 8T Q5 8R Fuel Injector Rail Line 2.0 TDI Diesel Engine 03L130089A

Audi A4 B8 A5 8T Q5 8R 2.0 TDI Diesel Fuel Rail is a fuel system component designed for diesel engines, responsible for stable fuel distribution to the injectors. A properly selected fuel rail ensures correct operating pressure, which translates to smooth engine operation and proper response to load. A used OEM component is a solution for drivers and workshops that want to maintain the factory engine characteristics at optimal repair costs.

Specifications and technical data

• SKU: 03L130089A-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 03L130089A
• Substitutable numbers: 03L130089A, 03L 130 089 A
• Location on the vehicle: Front
• Fuel type: Diesel
• Part type: Fuel Injector
• Category: Fuel Injectors

Purpose and Role of the Fuel Rail

The fuel rail for Audi diesel engines is a key element of the common rail system. It is responsible for uniform fuel distribution to individual injectors and pressure stabilization throughout the circuit. A correctly selected fuel rail allows for maintaining:

• stable fuel pressure across a wide range of engine loads,
• precise fuel metering by the injectors,
• repeatable operating characteristics of the 2.0 TDI unit,
• efficient engine starting when cold and hot.

The proper selection of the fuel rail for a specific engine configuration directly impacts the smoothness of operation, exhaust emissions, and fuel consumption.

Construction and Performance Parameters

The fuel rail offered belongs to the category of injector nozzles, as it works directly with high-pressure injectors, forming a cohesive fuel supply system with them. The design is intended for installation at the front of the engine bay, which facilitates service access and diagnostics.

The component is designed to work with diesel fuel, thus meeting the pressure and material requirements characteristic of modern diesel engines. The use of an original Audi solution allows for maintaining compatibility with factory engine accessories, sensors, and high-pressure lines.

Condition, Origin, and Service Application

The offered fuel rail is a used part, sourced from disassembly, which significantly reduces repair costs while maintaining OEM specifications. It is a practical solution for workshops specializing in TDI unit servicing and for users who want to restore the fuel system's functionality without compromising on the original design.

Replacing the fuel rail is recommended, among other things, in situations where there are problems with maintaining fuel pressure, control unit errors related to the fuel system, or leaks within the rail. Using an OEM component facilitates installation, as factory mounting points and connection geometry are preserved.

Benefits of Using an Original Fuel Rail

• Factory fit for 2.0 TDI engines – maintaining the original operating characteristics of the injection system.
• Compatibility with Audi accessories – cooperation with factory injectors, sensors, and fuel lines.
• Fuel pressure stabilization – support for uniform operation of all cylinders.
• Reasonable repair cost – a used OEM part as an alternative to new aftermarket parts with uncertain specifications.

For full operational safety, installation in a specialized service center is recommended, which will verify the system's tightness and the correctness of operating parameters after replacement.

Diagnostics and Prevention of the Injection System

When experiencing problems with diesel engine operation, it is advisable to perform comprehensive diagnostics of the fuel system, including both the fuel rail and the injectors. A detailed discussion of typical symptoms and consequences of neglect can be found in the article: diesel injector faults – symptoms, consequences, and diagnostics. This is a practical source of knowledge for mechanics and informed users who want to better understand the relationships within the common rail system.

Related Products and Audi Injection System Expansion

If you are also looking for other components in the Audi injector nozzles category for expanding or comprehensively repairing the fuel system, check out our offer for Audi injector nozzles. This will allow you to easily assemble a set of components matched to a specific engine unit, which will facilitate repair planning and reduce the risk of part incompatibility.