Audi A4 B7 Double Seat Belt Buckle Lock Catch Rear Left N/S 8E0857739

Visual condition of the part

The product shows signs of use visible in the photos.

Audi A4 B7 Double Seat Belt Buckle Lock Catch Rear Left N/S is an original component from the Seat belts and parts group, designed for the rear left side of the seat. It ensures secure fastening of two seat belts, which translates into stable and predictable operation of the passenger protection system. This is a practical solution for users who want to restore full functionality to the rear safety zone in their Audi.

Specifications and technical data

• SKU: 8E0857739
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E0857739
• Substitutable numbers: 8E0857739, 8E0 857 739
• Location on the vehicle: Rear, Left
• Category: Seat Belts & Parts

Purpose and function in the vehicle

The double buckle is mounted in the rear left part of the cabin and works with the rear seat belts. Its task is to:

• provide a stable attachment point for two seat belts,
• ensure proper guidance of the buckle locking mechanism,
• maintain the correct geometry of the seat belt system during driving and in the event of a collision.

Thanks to its dedicated placement in the vehicle, this component is matched to the seat structure and factory mounting points, which facilitates installation and reduces the risk of improper fitment.

Original Audi craftsmanship

The buckle comes from the Audi line, which means it complies with the manufacturer's factory design and material standards. The original construction ensures:

• compatibility with standard seat belts used in the Audi A4 B7,
• preservation of the latch mechanism's operating characteristics as intended by the manufacturer,
• consistent fit to the vehicle interior in terms of shape and mounting method.

Choosing an original component helps avoid fitment issues that often arise with universal aftermarket replacements.

Characteristics of the used component

The presented double seat belt buckle is a used item, sourced from vehicle dismantling. Such parts are frequently chosen by informed users because they:

• retain factory geometry and operating parameters,
• allow for reduced repair costs while maintaining original quality,
• are compatible with the manufacturer's intended mounting system and associated components.

Before installation, it is recommended to perform a standard check of the latch mechanism and mounting points to confirm smooth operation and the absence of wear-related damage.

Safety and service aspects

A functional seat belt buckle has a direct impact on the effectiveness of passenger protection. In the event of symptoms such as looseness in the mount, difficulty inserting the buckle, or spontaneous release, replacing the component is a recommended service action. During installation, it is worth paying attention to:

• proper tightening of bolts at the factory mounting points,
• ensuring the belt webbing is not twisted in the buckle area,
• free operation of the buckle release button.

This approach allows for restoring full functionality to the safety system in the rear of the vehicle and maintaining compliance with the manufacturer's design specifications.

If you are planning a comprehensive repair or upgrade of the rear seat safety zone in your Audi and need other elements from the same group, such as retractors, buckles, or belt mounts, check out the available parts in the Audi seat belts and parts category.

Support in choosing used parts

When selecting parts from dismantling, many drivers wonder how to safely reduce the costs of repairing safety-critical systems. It is worth using practical tips on assessing the condition and selecting components – you can find them in the article "Brake calipers under the microscope: How to effectively reduce brake system repair costs by choosing proven recycled parts," which demonstrates universal principles for working with original used parts.