Belt Tensioner BMW X3 F25 X4 F26 Seat Lower Buckle Front Left 7256645

The BMW X3 F25 X4 F26 Front Left Seatbelt Pretensioner is an original safety system component designed for installation in the front left position of BMW X3 F25 and BMW X4 F26 vehicles. The precise design of the pretensioner ensures proper cooperation with the seatbelt and passive safety systems, resulting in stable belt retention in emergency situations.

Specifications and technical data

• SKU: 7256645
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7256645
• Substitutable numbers: 7256645, 72117256645
• Location on the vehicle: Front, Left
• Category: Seat Belts & Parts

Intended Use and Compatibility

The presented front left seatbelt pretensioner has been specifically designed for BMW X3 F25 and BMW X4 F26 models. Its placement on the vehicle is front left side, meaning it is fitted to the driver's seat in left-hand drive versions.

As a component from the Seatbelts and Parts category, the pretensioner works with the factory seatbelt and other system components, maintaining the correct mounting geometry and predictable performance during sudden braking or collisions.

Pretensioner Construction and Function

The seatbelt pretensioner is responsible for rapidly tightening the belt to the user's body when the safety system is activated. This limits excessive torso movement and improves driver stability in the seat.

• Controlled Belt Tension – the component works with the retractor mechanism, ensuring proper tension in critical situations.
• Precise Fit for Driver's Seat – designed for installation in the front left position, maintaining factory mounting points.
• Integration with BMW Safety System – the pretensioner is part of a complete system designed for specific load parameters and response times.

Condition and Benefits of Using a Used Part

The offered pretensioner comes from a selection of used BMW parts, allowing for an economical repair of the safety system while maintaining the original design. Compared to low-cost aftermarket alternatives, using an OEM salvaged part helps maintain consistency with the manufacturer's original specifications.

• Original Geometry and Mounting – no need for installation modifications or alterations to the seat structure.
• Optimal Cost-to-Quality Ratio – a used OEM part helps reduce expenses while maintaining proper operating parameters.
• Restoration of Full System Functionality – replacing a damaged pretensioner with a functional unit restores the correct operation of the seatbelt system.

Why Choose an Original BMW Pretensioner

Using original BMW seatbelt pretensioners is crucial for maintaining predictable vehicle behavior during a collision. A component designed by the vehicle manufacturer is adapted to the car's weight, body characteristics, and safety system control algorithms.

• Factory Fit for BMW X3 F25 and X4 F26 – no compatibility or installation issues.
• Integration with Other System Components – the pretensioner works with the belt, retractor, and control units according to design specifications.
• Maintaining a High Level of Passive Safety – using the correct component minimizes the risk of system malfunction.

Complementary Offers and Technical Knowledge

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

To compare the characteristics of sports drivetrains and braking systems with solutions used in series production cars, it is worth reading the article on our blog: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?. This provides valuable insight into how manufacturers design complete safety and performance systems in modern vehicles.