BMW 1 Series F20 F20N F21 LCI Sound Insulation Floor Rear 7221970

BMW 1 Series F20 F21 LCI Sound Insulation Floor Rear is an original component from the Carpets, floor mats, trunk trays group, designed for the rear section of the vehicle body. The carefully engineered damping layer reduces noise transmission from the chassis to the cabin, improving acoustic comfort and the overall driving experience. This is a practical solution for users who want to maintain the factory character of the interior while ensuring solid floor protection.

Specifications and technical data

• SKU: 7221970
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7221970
• Substitutable numbers: 51487221970, 7221970
• Location on the vehicle: Rear
• Category: Floor Mats, Carpets & Boot Liners

Purpose and function of the floor insulation

The presented insulation is tailored to the rear floor area in BMW 1 Series F20/F21 models, ensuring it works effectively with the factory body structure. This component creates an additional barrier between the floor panel and the upholstery, which reduces vibrations, road noise, and suspension operation sounds.

In practice, this translates into:

• a more stable acoustic background inside the cabin,
• reduced perceptible noise from the rear axle,
• better conditions for the audio system,
• protection of the floor against point loads from upholstery elements and luggage.

Construction and fitment for BMW

The floor sound insulation has been developed specifically for the BMW F20/F21 structure, which ensures proper profiling and fitment to the rear floor section. Thanks to this, installation is straightforward, without the need for modifications or cutting the material.

The appropriate geometry of the element promotes:

• secure adhesion to the metal surface,
• stable positioning under the factory upholstery,
• maintenance of the correct routing of installations running in the rear part of the vehicle.

Benefits of using original insulation

Using original insulation in the rear floor area allows for maintaining the structural and acoustic consistency of the interior. Factory fitment minimizes the risk of unwanted resonances, rattles, or looseness that often occur with universal parts.

Key advantages include:

• maintaining the factory level of acoustic comfort,
• better protection of the floor against mechanical wear from the interior side,
• aesthetic finish of the rear floor zone under the upholstery,
• easier diagnostics and service in the future due to compliance with manufacturer documentation.

Condition of the item and service application

The offered insulation comes from dismantling, making it an attractive service solution for users looking for original components at a reasonable price. This type of element works perfectly for post-accident repairs, replacing damaged interior sections, or during a comprehensive renovation of the rear cabin area.

Replacing worn or damaged insulation with an original part allows for restoring proper acoustic parameters and organizing the floor layers, which is important both for driving comfort and the future resale value of the vehicle.

Expanding BMW interior upgrades

If you are planning a comprehensive repair or upgrade of the floor area in your BMW and need other elements from the same group, such as carpets, floor mats, or additional protective mats, check the available parts in the BMW Carpets, floor mats, trunk trays category.

If you are also interested in improving the acoustic characteristics of the vehicle from the exhaust system side or are planning broader modifications in this area, it is worth checking the advice contained in the article Performance exhaust system: used manifolds and sports catalytic converters on the road, which discusses practical aspects of selecting components for cars such as BMW.