BMW 1 3 5 Series E60N E81 E87N E90 E91 Acoustic Cover Rear Engine Diesel N47

BMW 1 3 5 Series E60N E81 E87N E90 E91 Acoustic Cover Rear Engine Diesel N47 is a factory-original component designed for BMW diesel models, mounted in the rear section of the engine bay. It is responsible for reducing diesel engine noise and providing additional thermal and mechanical protection for components. As a result, it ensures more comfortable driving conditions and a more stable engine operating environment.

Specifications and technical data

• SKU: 7797411
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7797411
• Substitutable numbers: 11147797411, 7797411, AS
• Location on the vehicle: Rear
• Fuel type: Diesel
• Category: Other Engine Parts

Function and application of the engine acoustic cover

The presented cover has been designed specifically for Diesel units in selected BMW 1 and 3 Series models, where it is mounted in the rear part of the engine bay. Its purpose is to:

• reduce the transmission of engine noise into the cabin,
• limit vibrations and resonances in the bulkhead area,
• provide an additional thermal barrier between the engine and the vehicle interior,
• protect auxiliary components from dirt and debris in the engine bay.

Consequently, the cover helps maintain stable operating conditions for the powertrain and improves overall acoustic comfort inside the vehicle.

Compatibility and fitment for BMW

The part comes from the BMW line and is prepared for installation in vehicles from the E81, E87 LCI, and E90 families with diesel engines. The design of the cover is matched to the geometry of the rear engine bay, which facilitates installation at factory mounting points and allows for the original routing of installations and wiring.

Its original origin ensures proper fitment with other engine bay components, without the need for modifications or adjustments required by aftermarket replacements. This is particularly important for acoustic covers, where gaps can significantly reduce noise dampening effectiveness.

Technical characteristics and benefits of installation

The engine acoustic cover has been designed with the specifics of diesel units in mind, which generate higher levels of noise and vibration than gasoline engines. The appropriately selected material structure and shape, matched to the rear of the engine bay, effectively limit:

• the knocking and clattering characteristic of diesel engines,
• the transmission of vibrations to the bulkhead and body components,
• sudden temperature changes in the zone adjacent to the cabin.

An additional advantage is the improvement of the engine bay aesthetics – an organized, covered space facilitates maintenance and limits the accumulation of dirt on components located in the rear part of the powertrain.

Condition and choice of an original used part

The offered cover is a used component, which allows for combining an attractive purchase cost with the preservation of the manufacturer's original specifications. In the case of acoustic covers, choosing an OEM part is particularly beneficial – factory fitment and the correct material density translate into predictable noise dampening parameters and durability during long-term operation.

For many BMW diesel users, this is a sensible solution for restoring the completeness of the engine bay after repairs, collisions, or previous removal of the covers.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as covers, insulation, or additional protective panels, check the available parts in the Other BMW category.

Technical support and knowledge about parts

When selecting components for the powertrain and accessories, it is worth using reliable sources of knowledge. If you are interested in how different engine, brake, and chassis configurations affect vehicle characteristics and part selection, check out the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses design differences using the example of sports models and standard versions.