Audi A4 B8 A5 8T 2.7 3.0 TDI Engine Oil Filler Neck Cap 059103482D

Audi A4 B8 A5 8T 2.7 3.0 TDI Engine Oil Filler Cap is an original part from the oil drain and filler plugs and dipsticks group, designed for Audi 2.7 and 3.0 TDI diesel engines. It ensures a tight seal for the oil filler neck, stabilizing lubrication system operating conditions and reducing the risk of leaks.

Specifications and technical data

• SKU: 059103482D
• Mark: Audi
• Condition: Used
• OEM Part Number: 059103482D
• Substitutable numbers: 059103482D, 059 103 482 D
• Category: Oil Drain Plugs, Filler Caps & Dipsticks

Purpose and Function of the Oil Filler Cap

The engine oil filler cap for Audi A4 B8 and A5 8T is responsible for securely closing the oil filler neck in TDI engines. A correctly chosen part:

• maintains the seal of the lubrication system in the upper part of the engine, limiting evaporation and contamination of the engine bay,
• stabilizes oil pressure and operating conditions in the valve cover area,
• protects against contaminants entering the engine unit during operation.

Thanks to the use of original OEM design, the cap works with the factory valve cover, ensuring proper alignment and sealing pressure.

Construction and Fitment for Audi A4 B8 / A5 8T TDI

The presented cap belongs to the category of oil drain and filler plugs and dipsticks, meaning it is designed to work in direct contact with engine oil. The construction includes:

• precise fit with the filler neck in 2.7 and 3.0 TDI engines,
• appropriately selected sealing geometry minimizing the risk of leaks under load,
• ergonomic grip shape, facilitating unscrewing and tightening during service.

Its original Audi origin helps maintain the factory parameters of the lubrication system and compatibility with engine components.

Item Condition and Service Application

The cap is offered in used condition, allowing for an economical replacement of a damaged or worn part while maintaining the original manufacturer's specifications. This is a practical solution in situations where:

• the factory cap has cracked or deformed due to overheating or improper tightening,
• the seal has lost its elasticity, causing oil leaks onto the valve cover,
• a quick repair is necessary without investing in expensive aftermarket parts of uncertain quality.

Using an original cap from a dismantled vehicle helps maintain the technical integrity of the engine unit and reduces the risk of problems arising from poorly fitting aftermarket alternatives.

Benefits of Using an Original Oil Filler Cap

Choosing a part like the Audi A4 B8 A5 8T 2.7 3.0 TDI Engine Oil Filler Cap translates into a number of practical advantages:

• maintaining the factory seal of the lubrication system in the upper part of the engine,
• reducing engine bay contamination from oil and vapors,
• secure fit to the valve cover without the need for modifications,
• maintaining compliance with Audi service documentation, facilitating maintenance and diagnostics.

This is particularly important in 2.7 and 3.0 TDI units, where stable oil operating conditions affect the durability of components and timing parts.

Related Products and Technical Knowledge

If you are looking for other Audi oil drain and filler plugs and dipsticks, check out the Audi oil drain and filler plugs and dipsticks available in our store to select parts that fit your specific model and engine version.

When performing oil-related service, it's also worth considering the condition of the cooling system, which directly impacts the temperature and durability of the lubricant. You can find more practical information in the article Engine Cooling System – Overheating, Repair, and Used Radiators, which discusses the relationship between operating temperature and engine lifespan.