Audi A4 8K 2.0 TDI Diesel Engine Alternator Generator 04L903017E

Audi A4 8K 2.0 TDI Diesel Engine Alternator Generator is a component from the Alternators and generators group, designed for the charging system in diesel-powered vehicles. This used component ensures a factory-fit for the 2.0 TDI power unit, which facilitates installation and reduces the risk of compatibility issues. It is a practical solution for users who want to restore proper battery charging without investing in a new component.

Specifications and technical data

• SKU: 04L903017E
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L903017E
• Substitutable numbers: 04L903017E, 04L 903 017 E, 0125711154, 0 125 711 154
• Fuel type: Diesel
• Category: Alternators & Generators

Purpose and function in the electrical system

The presented alternator is dedicated to Audi vehicles with a 2.0 TDI diesel engine, where it is responsible for the stable power supply of the electrical system and charging the battery while the engine is running. The design, adapted to the characteristics of a diesel engine, ensures adequate current efficiency under typical operating conditions, both in city driving and on the highway.

As an element from the Alternators and generators category, this part works with the accessory belt, pulley, and engine control system, maintaining the correct voltage in the installation. Using an original dismantled part allows you to maintain compliance with the factory operating parameters of the electrical system.

Benefits of using an original alternator

Using an alternator from the same Audi A4 8K 2.0 TDI model family limits the need for installation modifications and mounting adjustments. This is particularly important for repairs where time and reliability after replacement are crucial. A used OEM component usually works better with the factory engine controller than replacements with ambiguous parameters.

The main advantages of this solution include:

• factory fit for the diesel power unit,
• preservation of original charging characteristics,
• reduction of the risk of electrical system errors after installation,
• economical cost-to-functionality ratio compared to new parts.

Condition, origin, and service application

The offered alternator is a used element, sourced from dismantling, which allows for a cost-effective restoration of the charging system's efficiency. This type of part will work well both for a typical replacement of a worn-out component and for post-accident repairs where it is necessary to restore the complete diesel engine accessory set.

Due to its purpose, the alternator can be used as a direct replacement for the factory-installed component, provided that the manufacturer's markings and reference numbers match. Before installation, it is recommended to perform a standard verification of the vehicle's electrical system and the condition of the accessory belt.

Support with selection and system expansion

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as alternators with different capacities, generators for other engine versions, or compatible accessory components, check the available parts in the Audi alternators and generators category.

For drivers interested in a broader view of selecting powertrain components and the relationships between drivetrain elements and driving characteristics, the guide article Dismantled drive axles and differentials – how to choose gear ratios for your driving style may be helpful, as it organizes key concepts and facilitates informed planning of modifications.