BMW 1 Series F20 F20N F21 F21N LCI Sound Insulation Trunk Rear Left N/S 7221877

BMW 1 Series F20 F20N F21 F21N LCI Sound Insulation Trunk Rear Left N/S is an original acoustic equipment component designed for installation in the rear left section of the trunk in facelifted BMW 1 Series models. Thanks to its precise fit to the body structure, it provides effective reduction of noise penetrating from the chassis and cargo area into the cabin. This practical solution improves acoustic comfort while maintaining the factory character of the BMW interior.

Specifications and technical data

• SKU: 7221877
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7221877
• Substitutable numbers: 7221877, 51477221877
• Location on the vehicle: Rear, Left
• Category: Other Interior Parts & Accessories

Purpose and function of the trunk sound insulation

The presented sound insulation is dedicated to compact BMW 1 Series models of the F20/F20N and F21/F21N generations after the LCI facelift, where it is responsible for damping vibrations and sounds in the rear left part of the vehicle. This component operates in the trunk area, reducing:

• road and tire noise,
• sounds originating from the suspension and chassis,
• resonances occurring in the cargo space.

As a result, the passenger cabin remains better isolated from noise, which promotes a quiet ride both in the city and on the highway.

Construction and fitment for the BMW 1 Series

The trunk sound insulation has been designed as an OEM component, strictly matched to the geometry of the BMW 1 Series body. This means that the shape, mounting points, and edge contours are consistent with the manufacturer's factory specifications. Installation in the rear left part of the vehicle does not require modifications or forced fitting – the component works with the original mounts and adjacent upholstery panels.

Such a solution allows for maintaining the visual and technical consistency of the trunk interior while keeping the proper level of acoustic insulation intended for the LCI version.

Benefits of using original sound insulation

Using factory sound insulation in the BMW 1 Series trunk brings a number of practical benefits, especially in vehicles used on a daily basis:

• improvement of acoustic comfort inside the vehicle,
• reduction of vibration transfer from the rear axle,
• maintenance of the factory trunk finish standard,
• secure fit to the body structure without interfering with the chassis.

For users who value the consistency and functionality of the interior, it is important that the original BMW trunk sound insulation allows for restoring the vehicle's original acoustic properties after damage or removal of a previous component.

Placement on the vehicle and installation aspects

The component is intended for installation in the rear – left side area, which is important when selecting parts for a specific body configuration. In practice, this facilitates the identification of the correct component during repairs or when completing missing trunk upholstery elements.

Replacing the trunk sound insulation in a BMW 1 Series usually comes down to removing adjacent panels and re-seating the element in the points provided by the manufacturer. Thanks to the OEM design, this process is predictable and can be carried out in an orderly manner, without the need for non-standard installation solutions.

OEM part selection and additional information

The offered component comes from the group of original BMW parts, which facilitates identification by the OEM part number and related interchangeable numbers available in the technical specification. This labeling method allows for verifying compatibility with a specific body version and vehicle year.

If you are planning a comprehensive repair or upgrade of the cargo area in your BMW and need other elements from the same group, such as additional soundproofing, upholstery panels, or side covers, check the available parts in the Other BMW category.

For drivers interested in comparing the characteristics of sports models with standard versions, including differences in chassis construction and running gear, our blog article may be helpful: Audi RS vs other models – what is hidden under the hood and chassis?.

If you want to better understand the importance of original components in the context of durability and safety, it is also worth reading the material: Quality guarantee and OEM safety – why are used original car parts the best choice for your car?, which explains how to consciously choose used parts for your BMW.