Acoustic Foam BMW F20 F21 LCI B37 Diesel Engine Sound Insulation Cover 8513839

Acoustic Foam BMW F20 F21 LCI B37 Diesel Engine Sound Insulation Cover is an original component designed for diesel units, which improves acoustic comfort and protects the upper part of the engine. Thanks to its precise fit to the design of the facelifted BMW 1 Series, it ensures stable mounting and predictable performance in daily operation. It is a practical solution for drivers who want to keep the engine bay organized, more aesthetic, and functional.

Specifications and technical data

• SKU: 8513839
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8513839
• Substitutable numbers: 11148513839, 8513839, BG
• Fuel type: Diesel
• Category: Engine Mounts

Purpose and function of the engine cover

The presented sound insulation is designed for installation on Diesel power units in facelifted (LCI) BMW F20/F21 models with the B37 engine. The element serves a dual role: on one hand, it reduces the transmission of noise from the engine bay to the cabin, and on the other, it protects the upper part of the unit from dirt, minor mechanical damage, and excessive exposure to external factors.

A properly selected sound insulation helps maintain stable operating conditions for engine accessories and also facilitates orientation in the engine bay during inspections and service procedures. The original geometry of the mounts allows for installation without interfering with the design of the power unit.

Benefits of using sound insulation in a diesel engine

Diesel engines generate a specific operating character that can be acoustically noticeable inside the vehicle. Using a dedicated cover with a damping layer allows for the reduction of:

• transmission of vibrations and sounds from the upper part of the engine,
• noises from the operation of injectors and accessories,
• the impact of contaminants on components located on the cylinder head.

As a result, driving becomes more comfortable, and the engine bay remains better protected. Stable mounting of the cover also helps maintain order under the hood, which is important during regular inspections and diagnostics.

Product characteristics and fitment

The cover is assigned to the Engine mounts category, which emphasizes its connection to the area of the power unit and components responsible for vibration damping. In practice, this means that the product works with the engine mounting system, supplementing it with an additional protective and acoustic layer in the upper part of the unit.

The element comes from the BMW range, which translates into compliance with factory assembly standards and predictable performance over long-term use. The product is marked as used, making it a reasonable choice for drivers looking for an original component in a more economical form, while maintaining the proper fit for the specific B37 engine variant.

Application in service and modernization

Replacing the engine cover sound insulation is particularly recommended when the existing element is damaged, deformed, or has lost its damping properties. Installing a properly selected cover:

• restores the factory level of protection for the upper part of the power unit,
• limits unwanted sounds coming from the engine bay,
• improves the overall aesthetics and clarity of the layout under the hood.

It is also a practical step during work related to the drivetrain, especially when engine mounting components are being serviced in parallel or modifications are being made to the accessories. Consistency with the factory design facilitates work for mechanics and reduces the risk of assembly issues.

Support with selection and car project development

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other elements from the same group, such as additional covers, damping elements, or mounting brackets, check the available parts in the BMW Engine mounts category.

We encourage car owners interested in improving the characteristics of their power unit to read our guide, which describes how to safely use used components for performance modifications – details can be found in the article How to increase engine power: a practical guide to engine tuning with used parts. This will make it easier for you to plan further work on your car, combining the replacement of the cover with other service or modernization activities.