BMW 3 Series E90 E91 M Sport Sound Insulatig Door Rear Left N/S 7070363

BMW 3 Series E90 E91 M Sport Sound Insulatig Door Rear Left N/S is a factory insulation component designed for installation in the rear left door. It is responsible for improving acoustic comfort, stabilizing the temperature inside the vehicle, and protecting the internal door structure from adverse conditions. By using the original sound-insulating foam, you maintain the proper door operating characteristics and the structural integrity of the entire panel.

Specifications and technical data

• SKU: 7161455
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7161455
• Substitutable numbers: 51487161455, 7161455, 51487070363, 7070363
• Location on the vehicle: Rear, Left
• Category: Doors & Door Skins

Purpose and function of the component

The presented sound-insulating foam has been designed specifically for the rear left door area in BMW E90 series models. Its task is to reduce the penetration of external noise, dampen door panel vibrations, and support the tightness of the structure. Its placement in the Rear, Left area ensures a perfect fit to the factory shape of the panel and technological openings, which translates into stable installation and proper interaction with other door components.

Benefits of using the original sound-insulating foam

Using dedicated insulation in the rear doors allows you to maintain the proper acoustic parameters of the cabin and reduce resonances generated while driving. In practice, this means:

• reduced noise levels coming from the wheel arch and sill area,
• better damping of door panel vibrations on uneven surfaces,
• more stable operating conditions for mechanisms inside the door,
• maintenance of the factory door closing and latching characteristics.

The original foam from the Doors and door panels group is designed for the specific geometry of the BMW body, ensuring appropriate stiffness, flexibility, and adhesion to the surface.

Installation characteristics

The component is intended for installation in the rear left part of the body, within the internal door structure. The design of the foam is matched to factory mounting points and embossments, which facilitates correct positioning during service work. Replacing the insulation is particularly recommended during:

• post-accident repairs in the rear left door area,
• regeneration or replacement of the door panel,
• removing the effects of moisture inside the door,
• upgrading the cabin's acoustic insulation.

Choosing an original BMW component allows you to avoid problems with shape mismatch, insufficient material thickness, or improper adhesion to the metal, which is often typical of generic replacements.

Condition and origin

The sound-insulating foam comes from the original BMW production line, which guarantees compliance with factory quality and compatibility standards. As a used part, it represents a reasonable compromise between cost and maintaining proper performance parameters. Choosing such a solution is particularly beneficial for maintenance repairs where matching the specific model and body version is crucial.

Integration with other BMW door components

The insulation works with the panel, reinforcements, and mechanisms located in the door, creating a cohesive system that protects the interior from noise and moisture. If you are planning a comprehensive repair or upgrade of the side body area in your BMW and need other parts from the same group, such as panels, reinforcements, or internal panels, check the available parts in the BMW Doors and door panels category.

For users who are also considering work on the drivetrain and want to take a conscious approach to component selection, an article describing the advantages of using original used parts may be helpful – more information can be found in the material Humming differential? Find out why a used OEM drive axle is a better investment than an uncertain replacement.