Audi A8 D4 Q7 4L Engine Oil Pump Timing Chain Sprocket 4.2 TDI 079109570AP

Audi A8 D4 Q7 4L Engine Oil Pump Timing Chain Sprocket 4.2 TDI is an original component from the Sprockets group, designed for the lubrication system of the 4.2 TDI diesel engine in premium Audi models. The precise gear geometry ensures stable power transmission to the oil pump, which translates into safe operation of the engine under a wide range of loads.

Specifications and technical data

• SKU: 079109570AP
• Mark: Audi
• Condition: Used
• OEM Part Number: 079109570AP
• Substitutable numbers: 079109570AP, 079 109 570 AP
• Category: Sprockets

Purpose and function of the oil pump sprocket

The presented sprocket is responsible for the mechanical coupling of the drive shaft with the oil pump in the 4.2 TDI engine used in the Audi A8 D4 generation and Audi Q7 4L. A properly selected sprocket ensures correct pump synchronization, which is crucial for maintaining adequate oil pressure throughout the entire lubrication system.

Replacing a worn component with an original sprocket from the same design group helps reduce the risk of oil pressure drops, excessive bearing wear, and unwanted noise resulting from gear backlash. This solution is particularly recommended for 4.2 TDI engine overhauls when maintaining factory performance parameters is a priority.

Construction and technical characteristics

The oil pump sprocket belongs to the Sprockets category, meaning its primary task is the precise transmission of torque. The tooth profile has been designed for cooperation with the dedicated oil pump in the 4.2 TDI unit, ensuring proper operating smoothness and a reduced level of vibration.

Original manufacturing ensures:

• stable meshing with mating components,
• appropriate rigidity and resistance to dynamic loads,
• repeatability of parameters compared to factory assembly.

As a result, the sprocket can be used both for standard replacement of worn components and for more advanced repairs of the lubrication system in Audi 4.2 TDI engines.

Component condition and service application

The offered sprocket is a used part, which in practice means the possibility of an economical repair while maintaining Audi's original design specifications. This type of part is particularly suitable for vehicles used intensively, where reasonable service costs are important while maintaining compatibility with the factory oil pump drive system.

Choosing an original sprocket for the 4.2 TDI engine allows the mechanic or vehicle owner to reduce the risk of fitment issues and facilitates future diagnostics – the lubrication system remains consistent with the solutions provided by the manufacturer.

Benefits of using an original Audi sprocket

Using an oil pump sprocket dedicated to the Audi A8 D4 and Q7 4L with a 4.2 TDI engine brings a number of practical service benefits:

• Replication of factory operating parameters – maintaining the correct gear ratio and oil pump drive characteristics.
• Compatibility with the 4.2 TDI unit – no need to modify other lubrication system components.
• Hassle-free installation – predictable fitment with original Audi engine components.

Thanks to this, the part provides a solid foundation for restoring the proper operation of the lubrication system in advanced diesel units used in high-end models.

Oil pump drive system expansion and additional resources

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 additional sprockets, gears, or mating drive components, check out the available parts in the Audi Sprockets category.

If you are interested in a broader context of engine unit operation, including the impact of the lubrication system on engine component durability and cooperation with the exhaust system, it is worth checking out our guide: Performance exhaust system: used manifolds and sports catalytic converters on the road. This will allow you to better understand the relationships between individual sub-assemblies in modern Audi designs.