Volkswagen Polo Mk5 Audi A1 8X Fuel Injector Rail 1.4 TDI Diesel 04B130093

The VW Polo Mk5 Audi A1 8X Fuel Rail 1.4 TDI Diesel is a fuel system component designed for 1.4 TDI diesel engines in Volkswagen Polo Mk5 and Audi A1 8X vehicles. This product, from the Injector Nozzles category, ensures stable fuel supply in modern diesel units, supporting smooth engine operation and correct fuel dosage across all load ranges.

Specifications and technical data

• SKU: 04B130093
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 04B130093
• Substitutable numbers: 04B130093, 04B 130 093
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role in the Fuel System

The fuel rail in a 1.4 TDI engine is responsible for the even distribution of diesel fuel to the injectors and maintaining the correct working pressure within the system. A properly selected fuel rail is crucial for:

• stable operation of the diesel unit across the entire RPM range,
• precise fuel metering by the injectors,
• reducing vibrations and rough idling,
• maintaining correct combustion parameters and exhaust emissions.

This component works in conjunction with the high-pressure pump and injectors, forming a cohesive fuel supply system in a diesel engine.

Benefits of Use in VW Polo Mk5 and Audi A1 8X

Choosing a fuel rail specifically designed for particular models, such as the Volkswagen Polo Mk5 and Audi A1 8X, allows for the preservation of factory engine operating parameters. A correctly fitted component from the injector nozzle category translates to:

• maintaining proper fuel pressure throughout the common rail system,
• improved throttle response due to stable injector supply,
• reduced risk of jerking and power loss under load,
• more predictable fuel consumption in daily use.

In cases of symptoms such as difficulty starting a warm engine, excessive smoke, or reduced performance, inspecting the fuel rail and injectors is one of the fundamental diagnostic steps.

Technical Characteristics and Diesel Fuel

The fuel rail in this model is designed to work with diesel fuel, meaning it is resistant to the high operating pressures typical of modern diesel units. The component's design is focused on:

• maintaining system seal under high fuel pressure,
• stabilizing flow to individual injectors,
• compatibility with sensors and accessories of the diesel fuel system.

As a result, the fuel rail serves as an important link between the high-pressure pump and the injectors, influencing engine smoothness and durability.

Used Condition and Service Application

The offered component is in used condition, making it a cost-effective alternative to new parts while maintaining the functionality required for daily operation. This type of solution is often chosen for:

• post-accident repairs, where replacement of fuel system components is necessary,
• routine servicing of older VW Polo Mk5 and Audi A1 8X models,
• comparative diagnostics, when a functional fuel rail is needed to verify a fault.

Prior to installation, a standard leak test of the system and verification of the entire diesel fuel supply system's correct operation are recommended.

Volkswagen Injector Nozzles – Selection and Offer

If you are looking for other components from the Volkswagen Injector Nozzles category for your car, check out our dedicated offer: Volkswagen Injector Nozzles. Focusing on a single category simplifies the selection of appropriate components for a specific engine and vehicle generation.

Diesel Injection Fault Diagnostics – User Knowledge

When experiencing issues with the fuel system, it is beneficial to be aware of the typical symptoms of wear in injectors and associated components. Detailed information on symptoms, consequences of neglect, and basic diagnostics can be found in the article: Diesel Injector Faults – How to Recognize Them and What Their Neglect Entails. This provides practical knowledge for planning fuel rail repair or replacement.

Summary

The VW Polo Mk5 Audi A1 8X Fuel Rail 1.4 TDI Diesel is a functional fuel system component designed for 1.4 TDI diesel engines. A properly selected fuel rail supports stable injector operation, correct fuel pressure, and predictable performance of the power unit, making it an important component in the professional servicing of Volkswagen and Audi models with this engine type.