Volkswagen Polo 6R Golf MK7 Audi A3 8V Crankshaft Pulley Petrol 04C105243D

Volkswagen Polo 6R Audi A3 8V Crankshaft Pulley Petrol is an original powertrain component designed for petrol engines, responsible for stable power transfer to the engine's auxiliary systems. This precisely manufactured pulley, from the tensioners and rollers category, is designed to meet the demands of Volkswagen Group powertrains.

Specifications and technical data

• SKU: 04C105243D
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 04C105243D
• Substitutable numbers: 04C105243D, 04C 105 243 D
• Fuel type: Petrol
• Category: Tensioners & Pulleys

Purpose and Function of the Crankshaft Pulley

The crankshaft pulley in Volkswagen Polo 6R and Audi A3 8V models with petrol engines operates in direct connection with the crankshaft, responsible for transferring torque to the belt driving the engine's auxiliary systems. A correctly selected component from this group ensures:

• stable operation of auxiliary systems (e.g., alternator, power steering pump – depending on vehicle configuration),
• reduction of torsional vibrations transferred from the crankshaft to the belt system,
• even load distribution on tensioners and rollers across the entire engine speed range.

Thanks to its proper geometry and fitment for the specific engine, the pulley offered here supports the correct operation of the auxiliary powertrain in Volkswagen Group vehicles.

Construction and Fitment with Tensioner and Roller Systems

The presented pulley belongs to the tensioners and rollers category, meaning it is a component that works with the belt and other guiding and tensioning components. Proper fitment of this element is crucial for:

• maintaining correct belt tension throughout the engine's operating cycle,
• limiting slippage on the belt's working surface,
• reducing wear on tensioners and rollers by evenly distributing forces.

The pulley is designed for petrol engines, so its operating characteristics are adapted to the specifics of petrol units – higher RPMs and a different torque curve compared to diesel engines.

Benefits of Using an Original Volkswagen Pulley

Choosing an original Volkswagen pulley allows you to maintain the original operating parameters of the auxiliary powertrain. Key advantages of this solution include:

• factory fitment to the crankshaft and other system components,
• compatibility with the design of tensioners and rollers used in the specific engine,
• preservation of the manufacturer's intended operating characteristics under various loads and speeds.

This component comes from the OE (Original Equipment) segment, meaning it was designed for specific Group vehicle models and meets requirements regarding dimensions, mounting method, and interaction with the drive belt.

Condition, Verification, and Practical Application

The offered crankshaft pulley is a used part, which allows for economical repair or service of the auxiliary powertrain while maintaining the original manufacturer's specifications. This type of component is particularly useful in situations where:

• the existing pulley shows signs of wear on its working surface or mechanical damage,
• there are unusual vibrations or noises in the front part of the engine,
• a comprehensive service of the tensioner and roller system, including belt replacement, is necessary.

By maintaining its original geometry and operating parameters, using this pulley helps restore correct operating conditions for the belt and its cooperating components.

Part Selection by Numbers and Technical Support

The pulley has an OEM part number and interchangeable numbers, which facilitates unambiguous identification and selection for a specific engine and vehicle equipment version. When selecting the part, it is advisable to use manufacturer markings and catalog data to ensure full compatibility with the tensioner and roller system installed in the car.

If you are interested in other Volkswagen tensioners and rollers, check availability in our assortment: Volkswagen tensioners and rollers.

In case of doubts related to engine auxiliary system diagnostics, including the alternator, a practical guide for drivers may be helpful: when it's worth replacing an alternator with a used one.

If you want to expand your knowledge on safely choosing parts from the secondary market, we also recommend the material: safe online purchase of used car parts, which discusses step-by-step strategies for selecting parts by OEM and reference numbers.