BMW 3 Series E91 Touring Sound Insulation Rear Bench Floor 7139132

BMW 3 Series E91 Touring Sound Insulation Rear Bench Floor is an original component designed for the rear section of the vehicle body, responsible for effective acoustic and thermal insulation of the floor area around the rear bench. Thanks to its factory-fit design for BMW construction, it ensures stable seating and improves the acoustic comfort of the passenger cabin. This is a practical solution for users who want to restore the proper insulation parameters of the interior or replace a missing element after bodywork repairs.

Specifications and technical data

• SKU: 7139132
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7139132
• Substitutable numbers: 51487139132, 7139132, BG
• Location on the vehicle: Rear
• Category: Splash Guards & Mud Flaps

Purpose and function of the component

The presented sound insulation is dedicated to the rear part of the vehicle, in the floor area under the rear bench. Its task is to reduce the transmission of noise from the suspension, wheel arches, and chassis into the passenger cabin, as well as to stabilize the floor finishing layers. The properly selected shape and material structure allow for precise fitting to factory mounting points, which facilitates installation and ensures the correct performance of the component in the long term.

Benefits of using rear floor sound insulation

Using this type of insulation in a BMW translates into significantly better comfort during daily use. The component helps to reduce:

• road noise and suspension operation audible in the rear part of the cabin,
• resonances and vibrations transmitted from the chassis to the floor panel,
• mechanical stress acting on the upholstery and floor finish.

As a result, the interior remains more acoustically organized, and passengers on the rear bench experience a higher level of ride comfort. Restoring the factory sound insulation is particularly important after bodywork repairs, floor replacement, or interior disassembly.

Installation characteristics and fitment

The component has been designed with a specific BMW model in mind, which means its geometry is consistent with the factory floor profile in the rear section of the body. This facilitates installation and minimizes the risk of incorrect positioning relative to the rear bench and other interior components. Placement on the vehicle in the rear zone ensures that the sound insulation works with factory mounts and covers, creating a cohesive insulation barrier.

The product comes from disassembly, which in practice means it is a part with parameters similar to factory-installed components, maintaining compatibility with original BMW design solutions.

Application in BMW service and restoration

Rear floor sound insulation is particularly useful in situations where:

• original insulation is missing after body or paint repairs,
• the existing element has been mechanically damaged or degraded through use,
• unwanted noise and vibrations appear in the rear part of the cabin.

Replacing it with an original component allows for the restoration of factory interior conditions without the need for makeshift soundproofing materials. This solution is particularly valued in professional service centers and workshops specializing in the comprehensive restoration of BMW vehicles.

Complementary items from the BMW Mud Flaps category

If you are planning a comprehensive repair or upgrade of the body zone in your BMW and need other elements from the same group, such as covers, edge protection, or additional protective elements, check out the available parts in the BMW Mud Flaps category.

Additional technical support

When selecting used components for vehicles, including insulation elements and covers, it is worth paying attention to the compatibility of markings and specifications with the factory configuration of the car. In the context of other sub-assemblies, such as control modules or sensors, a guide on selecting used electronic components may be helpful – you can find it in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?, which discusses, among other things, selection by manufacturer markings, compatibility issues, and practical aspects of installation.