Air Module BMW E81 E82 E87 Seat Side Unit Front Left N/S 7140561

Visual condition of the part 

The product shows signs of use visible in the photos. 

Air Module BMW E81 E82 E87 Seat Side Unit Front Left N/S is an original safety component designed for installation in the front left seat of BMW 1 Series E81/E87 models. This used seat airbag allows for the restoration of proper SRS system operation after a collision or seat replacement, ensuring compliance with the vehicle's factory design. By maintaining original geometry and connectors, it represents a solution perfectly matched to the factory installation.

Specifications and technical data

• SKU: 7140561
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 72127140561
• Substitutable numbers: 72127140561, 7140561
• Location on the vehicle: Front, Left
• Category: Other Interior Parts & Accessories

Purpose and function in the safety system

The left seat airbag operates as part of the SRS system responsible for protecting the driver in the side zone. Mounted within the seat structure on the front left side of the vehicle, it works with crash sensors and the airbag control unit to reduce G-forces acting on the body during a side impact in a fraction of a second.

Selecting the correct seat airbag is crucial for maintaining the proper SRS system activation sequence, which is why using an original component dedicated to the BMW E81/E87 minimizes the risk of installation errors and electrical compatibility issues.

Construction and fitment for BMW E81/E87

The airbag has been designed specifically for the seat structure of the BMW 1 Series E81/E87 generation, taking into account the shape of the side bolster, mounting points, and electrical harness routing. As a result, it:

• fits factory mounts in the seat frame,
• works with original SRS system connectors,
• maintains the correct position relative to the upholstery and side trim.

Such fitment allows for maintaining consistency with BMW's factory safety design, without the need for structural modifications or interference with the electrical harness.

Vehicle placement and installation aspects

The component is intended for installation in the driver's seat, in the front part of the vehicle. Precise determination of the placement on the vehicle facilitates the selection of the correct airbag in cases where the car features different seat variants (e.g., standard and sport) and different SRS system configurations.

When replacing the seat airbag, it is recommended to:

• disconnect the battery and wait for the recommended time before starting work,
• remove the seat in accordance with the BMW service procedure,
• check the condition of the SRS system harness and connectors,
• perform computer diagnostics after installation to clear any potential errors.

Due to the nature of this safety component, installation should be entrusted to a person with experience in airbag systems, which allows for maintaining the proper level of passenger protection.

Benefits of using an original BMW seat airbag

Using a dedicated seat airbag in a BMW E81/E87 brings a number of practical benefits:

• preservation of the factory SRS system activation characteristics,
• no need for mechanical or electrical adaptation,
• consistency with other safety system components in the vehicle,
• possibility of restoring full functionality after a collision or seat replacement.

The used component allows for optimization of repair costs while maintaining the original construction and purpose of the part.

Related components and additional technical information

When planning work within the driver's seat area, it is also worth paying attention to the condition of seat belt tensioners, seat occupancy sensors, and electrical harnesses that work with the SRS system. Consistent diagnostics of the entire seat area helps avoid recurring airbag errors on the dashboard and ensures predictable system operation.

If you are planning a comprehensive repair or upgrade of the driver's seat zone in your BMW and need other components from the same group, such as side seat airbags, SRS modules, or seat harnesses, check the available parts in the Other BMW category.

For a comparison of solutions used in sports constructions and a better understanding of the differences in manufacturers' approaches to drivetrains, braking systems, and chassis, you can read the article on our blog: Audi RS vs other models – what is hidden under the hood and chassis?.