Oil Filler Neck BMW X3 F25 X5 F15 N47N Diesel Cylinder Head Pipe Cover 7810587

Oil Filler Neck BMW X3 F25 X5 F15 N47N Diesel Cylinder Head Pipe Cover is a precision lubrication system component designed for BMW diesel engines. It is responsible for the safe and convenient refilling of engine oil, ensuring a tight connection with the engine cover. By maintaining factory geometry, the neck guarantees proper oil guidance during top-ups and maintenance.

Specifications and technical data

• SKU: 7810587
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7810587
• Substitutable numbers: 7810587, 11127810587, KD
• Fuel type: Diesel
• Category: Oil Drain Plugs, Filler Caps & Dipsticks

Purpose and function of the oil filler neck

The presented neck is a component of the lubrication system in N47N series diesel engines used in BMW X3 F25 and X5 F15 models. Its task is to provide stable guidance for the oil stream during refilling and to maintain proper sealing within the engine cover area. A properly selected neck reduces the risk of oil splashing around the engine bay, which translates into a cleaner engine environment and easier diagnosis of potential leaks.

In the case of diesel engines, where operating temperatures and loads are higher, a functional oil filler component is important for service convenience and maintaining the correct amount of lubricant. A damaged or leaking neck can cause dirt accumulation and, in extreme cases, hinder proper oil refilling.

Construction, fitment, and installation

The neck has been designed as a part compliant with BMW factory standards, which means maintaining the correct shape, diameter, and mounting points. As a result, it fits dedicated engine covers in X3 F25 and X5 F15 diesel models without the need for modifications or additional adapters.

The typical installation procedure includes:

• removing the old oil filler neck from the engine cover,
• inspecting the seat and seal in the cover,
• seating the new component while maintaining the correct installation direction,
• checking the stability of the mount and tightness after the first oil fill.

This approach allows for restoring proper lubrication system operation without interfering with other engine components.

Benefits of using an original oil filler neck

In BMW diesel engines, it is particularly important to maintain the correct oil level and convenient access to the filler. Using a neck dedicated to a specific vehicle configuration ensures:

• secure fitment to the engine cover – no play or uncontrolled movement during oil top-ups,
• stable oil guidance into the engine, which limits equipment contamination,
• preservation of factory ergonomics – easy access to the filler in the engine bay,
• consistency with other lubrication system elements, such as the filler cap or seals.

For users who regularly service their BMW X3 or X5, replacing a worn neck with a functional part from the same group helps maintain predictable engine operating conditions and daily service comfort.

Component condition and practical application

The offered neck comes from disassembly and is a used item, which in practice means it may show signs of wear typical for parts operating in the engine bay. At the same time, it remains a functional component that allows for economical repair of the oil filler system without the need to purchase a new part. This solution is particularly beneficial for routine repairs when the priority is to restore proper diesel engine serviceability at reasonable costs.

Due to the specific operating conditions of diesel units, it is worth checking the condition of the filler cap and any seals around the valve cover when replacing the neck to minimize the risk of leaks and contamination.

Related category elements and technical knowledge

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as oil drain plugs, filler caps, or dipsticks, check the available parts in the BMW oil drain and filler plugs and dipsticks category.

To better understand the impact of proper lubrication and operating temperature on engine durability, it is worth reading the guide on the cooling system and protecting the engine from overheating: Engine cooling system – overheating, repair, and used radiators. This will allow you to view oil and temperature management as interconnected elements of a single service strategy for your BMW.