BMW E81 E87 E90 LCI 118d 120d 318d 320d 520d Diesel N47 Engine Acoustic Cover

BMW E81 E87 E90 LCI 118d 120d 318d 320d 520d Diesel N47 Engine Acoustic Cover is an original engine bay component designed for N47 diesel units in 1 Series and 3 Series facelift models. The cover serves both an aesthetic and practical function – it organizes the space under the hood, reduces noise, and protects sensitive components from dirt. This solution allows you to restore the factory look of the front part of your BMW's engine bay.

Specifications and technical data

• SKU: 7797410-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7797410
• Substitutable numbers: 11147797410, 7797410, EM
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Other Engine Parts

Purpose and function in the engine bay

The engine top cover is tailored to the Diesel N47 unit used in BMW E81, E87, and E90 LCI series models. Its task is to cover the upper part of the engine from the front of the vehicle, which improves engine bay organization and facilitates service, as key components are clearly separated from the accessories.

This element also helps reduce the transmission of vibrations and noise to the passenger cabin, and limits the ingress of dust and fine debris onto the engine surface. As a result, the powertrain maintains a more orderly appearance, which is particularly important during regular inspections and potential resale of the vehicle.

Benefits of using an original cover

Using a factory engine top cover in a BMW with an N47 diesel engine provides:

• Precise fitment to the shape of the powertrain and accessory components, with no modifications required.
• Stable mounting in the front part of the engine bay, consistent with factory mounting points.
• A consistent, orderly engine bay appearance, in line with manufacturer standards.
• Better protection for wires, connectors, and plastic elements against direct heat exposure and dirt.

It is a practical choice for users who want to maintain the original character of the BMW engine bay while ensuring comfort during daily operation.

Installation characteristics

The cover has been designed for installation in the front part of the engine bay in diesel-powered vehicles. The construction is designed to work with factory brackets and mounting points, which facilitates removal during inspections and reinstallation after service work is completed.

The element is intended for BMW vehicles equipped with the N47 engine, ensuring dimensional and functional compatibility with the factory configuration. This is particularly important for engine covers, where improper fitment can cause unwanted vibrations or hinder service access.

Application in service practice

The engine top cover is suitable both for replacing a damaged part and for completing missing components in the engine bay after previous repairs. An organized space under the hood makes it easier for mechanics to locate sub-assemblies and allows the vehicle owner to more quickly assess the visual condition of the powertrain.

For vehicles with the N47 diesel engine, maintaining the completeness of the covers is also important for acoustic comfort – a properly fitted cover helps reduce the characteristic sound of the diesel unit, which improves the driving experience.

Configuration expansion and selection of other elements

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 additional covers, mounts, or engine bay trim elements, check the available parts in the Other BMW category.

For drivers interested in comparing the characteristics of powertrains and design solutions in various sports models, an article describing the differences between high-performance versions and standard variants may be helpful – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.