Audi A4 B7 Cabrio Seat Belt Catch Buckle Stalk Rear Left N/S 8H0857739

Visual condition of the part 

The product shows signs of use visible in the photos. 

Audi A4 B7 Cabrio Seat Belt Catch Buckle Stalk Rear Left is an original component from the Seat belts and parts group, designed for the rear left side of the vehicle body. It ensures proper seat belt fastening, which translates into stable passenger restraint and the safety system's operation in accordance with the manufacturer's specifications.

Specifications and technical data

• SKU: 8H0857739
• Mark: Audi
• Condition: Used
• OEM Part Number: 8H0857739
• Substitutable numbers: 8H0857739, 8H0 857 739
• Location on the vehicle: Rear, Left
• Category: Seat Belts & Parts

Purpose and function of the seat belt buckle

The presented buckle is dedicated to the rear left part of the cabin in the Audi A4 B7 Cabrio model. It is responsible for the mechanical connection of the seat belt to the vehicle structure, enabling its correct fastening, locking, and quick release when necessary. Thanks to its factory origin, the correct mounting geometry is maintained, which is crucial for the effectiveness of the passive safety system.

The element has been designed to work with the standard seat belt, maintaining the appropriate operating angle, range of motion, and latching force. In practice, this means secure fastening, reduced slack, and predictable behavior during daily vehicle use.

Benefits of using an original Audi buckle

Using an original buckle in the Audi A4 B7 Cabrio allows you to maintain the structural integrity of the safety system. You receive a component designed for a specific seat, mounting point, and belt path, which minimizes the risk of improper fitment. This is particularly important for the rear left side, where the installation space is limited by the shape of the convertible body.

The main advantages include:

• factory fit for the rear left seating area,
• maintenance of the original seat belt anchor point position,
• consistency with other safety system components,
• easier installation in place of a worn or damaged buckle.

Condition, origin, and installation aspects

The buckle comes from an Audi vehicle and is an aftermarket part, which allows for an economical replacement while maintaining the original design. The condition described as Used means that the part has been previously used but is suitable for further use after proper installation and verification of compatibility with the vehicle.

The placement on the vehicle described as Rear, Left facilitates the identification of the correct mounting position. When replacing, it is recommended to follow the disassembly sequence of the old part, use the original mounting points, and check the operation of the latching mechanism after installation.

Part selection by numbers and vehicle compatibility

To ensure you are choosing the right buckle for your Audi A4 B7 Cabrio, it is worth verifying compatibility using the OEM part number and interchangeable numbers. This information is particularly helpful when comparing components from different model years or equipment versions. In case of doubt, it is helpful to compare the shape, mounting type, and cable length (if a fastening sensor is present) with the element currently installed in the car.

If you want to better understand how to safely use used components for modifications and repairs, check out the guide How to increase engine power: a practical guide to engine tuning with used parts, which discusses a practical approach to selecting aftermarket components.

Expanding the seat belt system in an Audi

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

When shopping online, it may also be helpful to use OEM numbers to verify compatibility – you will find practical tips in the article Online parts shopping without risk – 5 proven ways to verify component compatibility using OEM numbers and paint codes, which describes step-by-step how to reduce the risk of errors when selecting parts.