VW Tiguan 5n Audi Q3 8U A3 8V Alternator Generator 14V 140A 2.0 TDI 04L903023L

VW Tiguan 5n Audi Q3 8U A3 8V Alternator Generator 14V 140A 2.0 TDI is an original component from the Alternators and generators group, designed for 2.0 TDI diesel engines. It ensures a stable power supply for the vehicle's electrical system and proper battery charging in Diesel engine cars.

Specifications and technical data

• SKU: 04L903023L-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L903023L
• Substitutable numbers: 04L903023L, 04L 903 023 L, 2627025B, TG14C078, 04L 903 021 L, 04L903021L, 04L 903 023 LX, 04L903023LX, 209571R
• Fuel type: Diesel
• Category: Alternators & Generators

Application and compatibility

The presented alternator is structurally matched to popular VAG group models, such as the VW Tiguan 5N and selected versions of the Audi Q3 8U and Audi A3 8V with the 2.0 TDI unit. Operating parameters have been selected to meet the requirements of diesel engines, which generate high electrical loads, especially with extensive comfort equipment and safety systems.

Thanks to the correct voltage and current range, the alternator stabilizes the system's operation, reduces voltage drops, and supports the proper functioning of control units, injection systems, and onboard electronics.

Construction and operating characteristics

The 14V 140A alternator has been designed as an efficient energy source for vehicles with a diesel engine, where the demand for electricity is higher than in gasoline units. The design provides effective cooling and properly selected windings, which translates into stable operation across a wide range of engine speeds.

High current efficiency allows for the simultaneous powering of many consumers – from lights and heating, through multimedia systems, to advanced driver assistance systems. The properly selected alternator drive ratio enables effective battery charging even at lower rotational speeds, typical for city driving.

Benefits of installation

Choosing this alternator primarily means maintaining factory charging parameters and compatibility with the vehicle's electronics. Proper matching to the 2.0 TDI unit reduces the risk of control unit errors, starting problems, or unstable electrical system operation.

• consistency with factory settings of diesel engine control units,
• adequate current reserve for additional equipment,
• maintaining proper battery performance in the long term,
• reduced risk of electrical system overloads.

For the user, this means more reliable engine starting, stable lighting operation, and a lower probability of failures related to insufficient charging.

Condition and purpose

The offered alternator is a used component, which makes it an attractive cost-effective solution while maintaining compliance with the vehicle's technical requirements. It is particularly useful in situations where a quick replacement of a damaged component is necessary while keeping the repair budget in check.

Thanks to the preservation of the original specification, it is a suitable choice for workshops specializing in VAG group vehicle service and for conscious users who are looking for parts with parameters similar to those installed at the factory.

Audi alternators and generators – expansion and service

If you are planning a comprehensive repair or upgrade of the electrical power supply area in your Audi and need other components from the same group, such as additional alternators, power generators, or compatible mounting components, check the available parts in the Audi alternators and generators category.

A safe choice for used components

When selecting a used alternator for a diesel engine, it is worth paying attention to the compatibility of operating parameters with the specific vehicle model and the quality of the component itself. A well-chosen alternator allows you to reduce service costs without sacrificing correct charging parameters.

If you want to better understand when purchasing a used part is technically justified and when it is better to opt for a different solution, the following article will be helpful: Renovation and repair of German cars – which used parts are worth buying and which are better to avoid?.