Volkswagen Golf Mk4 GTI Audi S3 8L Fuel Injector Nozzle Jet 1.8T 06A906031

Volkswagen Golf Mk4 GTI Audi S3 8L Fuel Injector Nozzle Jet 1.8T is an original component from the Fuel injector nozzles group, designed for 1.8T petrol engines in sports versions of Volkswagen and Audi. It ensures precise fuel dosing, stable engine operation, and predictable vehicle behavior during dynamic driving.

Specifications and technical data

• SKU: 06A906031
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 06A906031
• Substitutable numbers: 06A906031, 06A 906 031
• Fuel type: Petrol
• Category: Fuel Injectors

Purpose and function of the 1.8T fuel injector

The presented fuel injector is dedicated to 1.8T petrol engines used in, among others, the Volkswagen Golf Mk4 GTI and Audi S3 8L. Its task is to precisely atomize fuel in the combustion chamber, which translates into a correct air-fuel mixture, smooth idling, and predictable throttle response. In 1.8T turbocharged units, a functional injector is crucial for maintaining proper power, engine refinement, and thermal safety.

Benefits of using an original fuel injector nozzle

Using an original fuel injector nozzle in a 1.8T engine allows for maintaining the operating parameters specified by the manufacturer. In practice, this means:

• stable pressure and uniform fuel dosing to each cylinder,
• better performance repeatability under high load and at higher RPMs,
• reduced risk of an overly lean or rich mixture,
• more predictable behavior of the turbocharged engine during acceleration.

For owners of cars such as the Golf GTI or Audi S3 8L, this means more confident handling, better throttle response, and more effective utilization of the 1.8T unit's potential. Replacing a worn injector with a functional component from the same design group also helps reduce rough cold starts, jerking during acceleration, or excessive fuel consumption.

Technical characteristics of the petrol injection

The injector belongs to the group of components responsible for fueling the petrol engine. It operates in a high-pressure fuel system, working in conjunction with the fuel pump, fuel rail, and engine control unit. Control is electronic, and the nozzle opening time is precisely determined by the ECU based on numerous engine operating parameters.

In practice, a correctly selected and functional injector:

• facilitates engine starting at various temperatures,
• limits carbon deposit buildup in the combustion chamber,
• supports the maintenance of correct exhaust emission values,
• ensures smooth transitions between loads without jerking.

Component condition and service application

The offered fuel injector is a used part, making it an attractive cost-effective alternative for servicing high-output 1.8T units in cars such as the Golf Mk4 GTI or Audi S3 8L. This type of part is suitable both for standard fuel system repairs and for restoring factory engine performance after modifications or long-term operation.

Replacing a single injector nozzle or the entire set is particularly recommended when symptoms such as rough idling, power loss, increased fuel consumption, or noticeable engine vibrations occur. Using an original component from the Fuel injector nozzles group allows you to restore predictable engine behavior without the need for costly interference with other sub-assemblies.

Comprehensive Volkswagen fuel system service

If you are planning a comprehensive repair or upgrade of the engine area in your Volkswagen and need other components from the same group, such as additional injectors, fuel rails, or fuel supply elements, check the available parts in the Volkswagen fuel injector nozzles category.

When diagnosing fuel supply problems, it is also worth understanding the typical symptoms of injector damage, the differences between petrol and diesel units, and the potential consequences of neglect. An article describing the symptoms and consequences of faults in injection systems, available here, may be helpful: injector faults – symptoms, consequences, and diagnostics.