Audi A4 B8 B9 A5 8T Q5 8R Oil Dipstick Guide Tube Bung Plug 03L115418A

Audi A4 B8 B9 A5 8T Q5 8R Oil Dipstick Guide Tube Bung Plug is an original component from the Oil drain and filler plugs and dipsticks group, designed for the lubrication system in selected Audi models. Its precisely engineered design ensures a tight seal for the oil dipstick tube, which helps maintain proper engine operating conditions and reduces the risk of leaks. This is a practical service solution for users who want to maintain the factory functionality of the oil system.

Specifications and technical data

• SKU: 03L115418A
• Mark: Audi
• Condition: Used
• OEM Part Number: 03L115418A
• Substitutable numbers: 03L115418A, 03L 115 418 A
• Part type: Dipstick
• Category: Oil Drain Plugs, Filler Caps & Dipsticks

Purpose and function in the oil system

The oil dipstick guide tube plug in Audi A4 B8, A4 B9, A5 8T, and Q5 8R models is responsible for the stable and tight closure of the measurement channel where the oil level dipstick operates. A correctly selected component limits the ingress of contaminants into the tube and minimizes the risk of oil vapors escaping in an uncontrolled manner. This is particularly important in vehicles operated intensively, where the lubrication system works at elevated temperatures.

Using an original plug allows for maintaining factory sealing and fitment parameters, which translates into consistent oil level readings and long-term stability of the engine unit.

Construction and fitment for Audi models

The component has been designed specifically for the Audi A4 B8, A4 B9, A5 8T, and Q5 8R platforms, ensuring that the mounting geometry and the diameter interacting with the dipstick tube are consistent with the manufacturer's factory requirements. The appropriately selected body and seal material provides resistance to contact with engine oil and typical operating temperatures in the engine bay.

Such fitment reduces the need for additional modifications during installation and allows the plug to be treated as a direct replacement for the component factory-installed in the vehicle.

Condition, service application, and benefits of installation

The offered plug comes from dismantling and is a used component, which is a cost-effective solution while maintaining the original manufacturer's specifications. This type of part is suitable both for standard replacement of a damaged or lost plug and during broader work on the lubrication system, e.g., after engine repairs or replacement of other components from the plug and dipstick group.

The main advantages of using an original used plug include:

• factory fitment to the oil dipstick tube in the listed Audi models,
• maintaining compliance with the lubrication system design,
• reducing the risk of leaks in the oil level measurement area,
• economical restoration of full system functionality.

Selection support and related components

When selecting an oil dipstick guide tube plug, it is worth paying attention to compatibility with the specific engine version and vehicle year to ensure full installation compatibility. In case of doubt, it is helpful to compare the shape and mounting method with the element previously installed in the car or consult a mechanic specializing in the Audi brand.

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 oil drain plugs, oil filler caps, or measurement dipsticks, check the available parts in the Audi oil drain and filler plugs and dipsticks category.

Operation, lubrication system, and related technical issues

An efficient lubrication system, including a tight dipstick tube and plug, has a direct impact on the durability of the engine unit. An incorrect oil level or the ingress of contaminants can accelerate the wear of interacting components, which is why regular inspection of the dipstick and its accessories is an important part of service maintenance. In the context of long-term operation, it is also worth paying attention to the condition of the cooling system, which works with the lubrication system to maintain a stable engine operating temperature – more practical information on this topic can be found in the article Engine cooling system – overheating, repair, and used radiators.

For users interested in the wider use of used components from the VAG group, including Audi, when expanding or retrofitting a car, a guide on retrofitting may also be helpful, available at the link Retrofitting in VAG and BMW group cars: How to cheaply equip a car using used parts from higher versions?.