BMW F74 Rear Upper Seat Belt Tensioner Left N/S Black 5B3E9B6

BMW F74 Rear Upper Seat Belt Tensioner Left N/S Black is an original component from the Seat belts and parts group, designed for installation in the rear left part of the vehicle body. It enables proper guidance and stable tensioning of the seat belt, which translates into safer passenger restraint during daily vehicle operation.

Specifications and technical data

• SKU: 5B3E9B6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5B3E9B6
• Location on the vehicle: Rear, Left
• Part type: Pretensioner
• Category: Seat Belts & Parts

Purpose and function of the tensioner

The presented tensioner is responsible for the controlled guidance of the seat belt in the rear left part of the cabin. Its task is to maintain the appropriate belt tension, limit slack, and ensure smooth operation of the mechanism when fastening and unfastening the belt. Thanks to this, the passenger receives stable support, and the vehicle's passive safety system can operate in a predictable manner.

Compatibility with BMW vehicles

The component was designed by BMW as an original equipment part, which means it fits factory mounting points and is compatible with the design of the rear seat and the side body section. Its placement in the rear left area allows for seamless integration with the existing seat belt installation, without the need for vehicle structural modifications.

Performance characteristics

The black tensioner harmoniously blends with typical BMW interior finishes, maintaining visual consistency with the upholstery and other equipment elements. The design intended for operation in the rear part of the cabin ensures:

• stable seat belt guidance in the passenger's shoulder zone,
• reduction of unwanted belt abrasion thanks to proper guidance,
• comfortable belt usage during adjustment and fastening.

Condition and benefits of choosing a used part

The offered tensioner comes from the used BMW parts segment, which allows for combining cost-effectiveness with the preservation of the manufacturer's original design. Choosing such a solution is particularly beneficial for post-accident repairs or restoring full functionality of the safety system in older models, where compatibility with factory solutions is essential. To maximize the potential of dismantled components and ensure their long-term, stable operation, it is worth checking out practical tips regarding maintenance and usage – you can find them in the article How to extend the service life of used car parts?.

Expanding the safety system in BMW

If you are planning a comprehensive repair or upgrade of the rear seat passenger safety zone in your BMW and need other elements from the same group, such as guides, mounts, or additional tensioners, check the available parts in the BMW seat belts and parts category.

Summary

BMW F74 Rear Upper Seat Belt Tensioner Left N/S Black is a technically matched, original safety system component designed for the rear left part of the vehicle. It ensures proper belt guidance, maintains the visual consistency of the interior, and provides a functional solution for repairs and restoring full efficiency of the seat belt system in BMW cars.