VW Golf Mk8 Polo Mk6 Audi A3 8V 8Y Camshaft Control Valve 2.0 TDI 04E109257A

Volkswagen Golf Mk8 Polo Mk6 Audi A3 8V 8Y Camshaft Pulley 2.0 TDI is an original component from the Tensioners and pulleys group, designed for diesel engines. Thanks to its factory geometry and precise fit for Diesel units, it ensures stable operation of the timing system and predictable drive performance over a long service life.

Specifications and technical data

• SKU: 04E109257A
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 04E109257A
• Substitutable numbers: 04E109257A, 04E 109 257 A
• Fuel type: Diesel
• Part type: Timing Belt Pulley
• Category: Tensioners & Pulleys

Purpose and function in the timing system

The presented camshaft pulley operates within the timing drive system of diesel engines, responsible for the precise transmission of torque and maintaining proper synchronization between the crankshaft and other components. In 2.0 TDI units, the stable operation of this subassembly has a direct impact on engine refinement, correct valve timing, and the safety of the entire piston-crankshaft system.

The component was designed by the vehicle manufacturer, which translates into the correct tooth profile, appropriate rigidity, and compatibility with factory tensioners and pulleys used in modern Volkswagen and Audi designs.

Construction and technical characteristics

The camshaft pulley belongs to the Tensioners and pulleys group, which are components responsible for guiding and maintaining the tension of the timing belt or chain. The design is optimized for operation in Diesel engines, where higher dynamic loads and greater torque fluctuations occur compared to gasoline units.

The choice of material, processing method, and the working profile of the teeth are adapted for long-term operation in variable temperature conditions and at high speeds. As a result, the pulley maintains dimensional stability, which reduces the risk of timing drive skipping and associated costly failures.

Application in Volkswagen and Audi vehicles

The camshaft pulley is intended for modern Volkswagen and Audi models equipped with 2.0 TDI diesel engines. This solution is found in popular compact segment designs, such as the Golf, Polo, or Audi A3, where both durability and repeatability of engine performance parameters are essential.

Using an original component from this group allows for maintaining factory engine performance characteristics and facilitates future diagnostics and service, as the part parameters are known and predictable for workshops specializing in the Volkswagen brand.

Condition, selection, and installation aspects

The offered component is in Used condition, meaning it has been removed from a vehicle and should be verified for operational wear by an experienced mechanic before installation. In practice, with a proper assessment of the working surface condition and clearances, it can be an economical alternative to new components, especially for budget or restoration repairs.

Before purchasing, it is recommended to compare the parameters with the vehicle's service documentation and verify compatibility with the Diesel engine unit. Proper selection of the camshaft pulley for a specific engine is crucial for maintaining correct synchronization and avoiding excessive load on other system components.

Benefits of using an original camshaft pulley

• Factory fit for the timing system in Volkswagen and Audi diesel engines.
• Stable operation across a wide range of loads characteristic of 2.0 TDI units.
• Possibility of economical repair while maintaining parameters close to OEM solutions.
• Better predictability of timing drive behavior compared to random aftermarket replacements.

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 guide pulleys, tensioners, or additional idler pulleys, check the available parts in the Volkswagen Tensioners and pulleys category.

For drivers considering the use of used parts in other areas of the vehicle, practical tips on assessing the condition of subassemblies may be useful – you can find them in the article When is it worth replacing an alternator with a used one: a practical guide for drivers, which helps in making informed service decisions when choosing second-hand components.