BMW F10 F11 Seat Belt Tensioner Lower Seat Buckle Front Left N/S 9115305

The BMW F10 F11 Front Left Seatbelt Pretensioner is an original part from the seatbelts and parts category, designed for installation on the front left side of the vehicle. This component was engineered by BMW to maintain factory protection parameters for the driver and ensure full integration with the vehicle's safety systems.

Specifications and technical data

• SKU: 9115305
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9115305
• Substitutable numbers: 72119115305, 9115305
• Location on the vehicle: Front, Left
• Category: Seat Belts & Parts

Purpose and Function of the Seatbelt Pretensioner

The seatbelt pretensioner for the front – left side is responsible for rapidly tightening the seatbelt against the body in the event of a collision or sudden braking. This limits uncontrolled driver movement, supporting the operation of airbags and other passive safety systems. Using an original BMW pretensioner ensures the safety system's performance characteristics as intended by the manufacturer.

Construction and Compatibility with BMW F10 / F11

The offered part is structurally adapted to the BMW 5 Series F10 / F11 platform, taking into account seat geometry, mounting points, and seatbelt routing. This means:

• correct positioning relative to the driver's seat and body pillar,
• fit with factory brackets and belt guides,
• compatibility with the electrical system responsible for pretensioner activation.

Such precise fitting facilitates installation and minimizes the risk of assembly errors that could reduce the effectiveness of the safety system.

Condition, Verification, and Benefits of Using a Used Part

This seatbelt pretensioner is a used part, allowing for an economical repair of the safety system while maintaining original BMW manufacturing quality. Each part of this type should be thoroughly inspected before installation for:

• absence of signs of previous activation (firing),
• mechanical condition of the housing and mountings,
• correctness of electrical connectors and wiring harness.

Using an original pretensioner from the same model series helps maintain consistency with the vehicle's factory configuration, which is particularly important for its interaction with the airbag control modules.

Safety, Diagnostics, and Installation

When replacing the seatbelt pretensioner in a BMW F10 / F11, it is recommended to:

• disconnect the vehicle's power supply before working on the SRS system,
• use appropriate tools for removing the seat and upholstery components,
• check for errors in the airbag control unit after installation, and clear any stored fault codes if necessary.

A correctly installed pretensioner works in conjunction with collision sensors and the SRS control unit, ensuring predictable operation of the entire safety system in critical situations.

Other BMW Seatbelts and Parts

If you are looking for other BMW seatbelts and parts for your car, check out our dedicated category: BMW seatbelts and parts. There you will find a wide selection of safety system components tailored for various models of this brand.

Technical Knowledge and Safety System Development

Modern BMW safety systems work in conjunction with advanced lighting solutions, improving driver visibility and reaction. If you are interested in how the selection of appropriate headlights affects driving safety, consult the guide: See More and Better – A Complete Guide to Selecting and Replacing Used LED and Xenon Headlights. This is valuable supplementary knowledge for a comprehensive approach to vehicle safety.