BMW F20 F21 Turbo Charger Turbocharger Upper Cover N47N 114d 116d ed 8514666

Description

BMW F20 F21 Turbo Charger Turbocharger Upper Cover N47N 114d 116d ed is a precision turbocharging system component designed for BMW 1 Series diesel engines. The cover ensures proper shielding of the upper part of the turbocharger, supporting stable engine operation and correct airflow within the engine bay. This solution is dedicated to users who expect a technically matched component consistent with the factory design of the turbocharging system.

Specifications and technical data

• SKU: 8514667-5
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8514667
• Substitutable numbers: 11658514667, 8514667, 11658514666, 8514666
• Fuel type: Diesel
• Part type: Turbocharger Cartridge
• Category: Turbos & Parts

Purpose and function in the turbocharging system

The turbocharger upper cover in a diesel engine plays a vital role in protecting the rotor elements and housing from contaminants and the impact of temperatures in the engine bay. In N47N units used in BMW F20 and F21 models, it is responsible for:

• stable mounting of the upper part of the turbocharger assembly,
• shielding sensitive components from dust and fine debris,
• maintaining predictable operating conditions in the area of the hot side of the turbine.

As a result, the turbocharging system retains its characteristics, and the diesel engine can operate in a repeatable and predictable manner, which translates into efficient torque development within typical load ranges.

Benefits of using an original BMW cover

Using an original turbocharger upper cover in an N47N engine allows for maintaining factory compatibility with the geometry of the turbocharger and adjacent auxiliary components. In practice, this means:

• secure fitment with the turbine housing and mounting points in the engine bay,
• no need for modifications or adjustments during installation,
• maintenance of the manufacturer-intended airflow and heat dissipation around the turbocharger.

For users planning to service the turbocharging system in a BMW 1 Series with a diesel engine, this is an OEM-compliant solution that facilitates the restoration of proper turbine operation after repairs or replacement of other components.

Application in BMW N47N diesel engines

The cover has been designed with the specifics of diesel units in mind, where the turbocharger operates under high thermal and mechanical loads. In N47N engines used in 114d and 116d versions, it is essential for:

• maintaining adequate turbocharger protection during frequent city and highway driving,
• securing rotating elements against the influence of external operational factors,
• preserving stable operating conditions under variable loads typical for diesel units.

A well-chosen upper cover supports long-term, predictable turbocharger operation, which is important both for daily use and more dynamic driving.

Characteristics of the used component

The offered turbocharger upper cover is a used part, sourced from dismantling, which allows for an economical restoration of the turbocharging system’s efficiency while maintaining the original design. This type of component is particularly attractive to users who:

• are looking for a factory-matched element at a reasonable price,
• prefer parts consistent with the manufacturer’s original design,
• are planning a turbocharger service without interfering with the mounting geometry.

Choosing a used upper cover is a practical solution for repairs where maintaining the original architecture of the turbocharging system is crucial, without the need to use replacements with uncertain fitment.

Turbocharger cover vs. tuning and upgrades

When modifying diesel engines, such as increasing power or optimizing control software, the condition and completeness of the turbocharger accessories have a direct impact on the durability of the entire system. A functional upper cover:

• limits the risk of contaminants entering the turbine area,
• supports stable thermal conditions under higher loads,
• facilitates the maintenance of predictable operating parameters with increased boost.

If you are considering safely increasing the performance of your diesel car and want to better understand how to prepare the engine accessories for such changes, it is worth checking out the guide How to increase engine power: a practical guide to engine tuning with used parts, which discusses the practical aspects of modifications using aftermarket components.

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 housings, bodies, or additional turbine accessory components, check out the available parts in the BMW Turbochargers and parts category.