BMW E90 LCI F20 F21 F22 F30 F31 Diesel N47N Oil Filler Neck 7810585

The BMW E90 E91 E92 E93 LCI Oil Filler Cap is an original part from the Oil Drain and Filler Plugs & Dipsticks category, designed for diesel engines. It ensures a tight seal for the engine's oil filler, stabilizing the lubrication system's operation and reducing the risk of leaks and contamination.

Specifications and technical data

• SKU: 7810585
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7810585
• Substitutable numbers: 11127810585, 7810585
• Fuel type: Diesel
• Category: Oil Drain Plugs, Filler Caps & Dipsticks

Purpose and Function of the BMW Oil Filler Cap

The BMW E90 E91 E92 E93 LCI Oil Filler Cap is designed as a factory solution for diesel engines, where the integrity of the lubrication system is crucial for the powertrain's durability. A correctly fitted cap:

• prevents oil from escaping during diesel engine operation,
• limits the ingress of contaminants into the engine during use,
• stabilizes oil operating conditions, promoting uniform lubrication of moving parts.

Construction and Fit for the Lubrication System

The oil filler cap from this reference is structurally designed to fit the valve cover used in the BMW 3 Series E90, E91, E92, and E93 models after the facelift. The appropriately selected thread profile and sealing contribute to:

• secure, stable tightening without play,
• even pressure against the cover surface,
• easy installation and removal during servicing.

This ensures that the cap interacts with the lubrication system in a predictable and repeatable manner, which is particularly important for diesel engine operation.

Condition, Origin, and Safety of Use

The offered part comes from the BMW line and is a used component, allowing for factory-level fit while optimizing service costs. A used oil filler cap is a sensible solution in situations where:

• the original cap has suffered mechanical damage (cracking, wear),
• oil leaks are present around the filler neck,
• replacement with a part of known origin from the same model platform is necessary.

Choosing a cap from the same model family minimizes the risk of compatibility issues and helps maintain the performance parameters intended by the manufacturer.

Benefits of Using an Original Oil Filler Cap

Using an original oil filler cap in a BMW 3 Series diesel engine offers tangible operational benefits:

• Stable Lubrication System Seal – reduces oil evaporation and leaks from the upper part of the engine.
• Protection Against Contamination – lowers the risk of dust, moisture, and other contaminants entering the unit.
• Consistency with Factory Design – maintains the manufacturer's intended method of sealing the oil filler.

This solution is particularly recommended for servicing diesel engines, where lubrication quality directly impacts the lifespan of the turbocharger, timing system, and other cooperating components.

BMW Oil Drain and Filler Plugs & Dipsticks – Selecting the Right Parts

If you are looking for other parts from the Oil Drain and Filler Plugs & Dipsticks category dedicated to this brand, check out our offer for BMW oil drain and filler plugs & dipsticks to select components tailored to your specific model and engine type.

Diesel Engine Operation and the Lubrication System

In diesel engines, the proper condition of the lubrication and oil cooling system is crucial for the unit's longevity. It is worth noting the relationship between operating temperature and oil condition – more on this can be found in the article Engine Cooling System – Overheating, Repair, and Used Radiators, which discusses the impact of temperature on powertrain lifespan.

Why Choose a Used, Original Part

Opting for a used, original oil filler cap is a compromise between cost and maintaining factory parameters. In many cases, it is a more predictable solution than aftermarket alternatives of unknown specification. If you want to better understand the advantages of using used components, consult the guide Used Car Parts: Myths and Facts You Need to Know, which details the practical aspects of such a choice.