Audi A6 C6 Rear Seats Belt Buckle Lock Twin Double Left N/S 4F0857739D

The Audi A6 C6 Rear Double Seat Belt Buckle is a factory original safety system component designed for the rear left side of the seat. Its double design allows for secure fastening of two seat belt buckles, facilitating correct belt fastening by passengers and supporting the maintenance of required safety standards in Audi vehicles.

Specifications and technical data

• SKU: 4F0857739D
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0857739D
• Substitutable numbers: 4F0857739D, 4F0 857 739 D
• Location on the vehicle: Rear, Left
• Category: Seat Belts & Parts

Vehicle Application and Placement

The Rear Double Seat Belt Buckle is designed for installation in the rear left interior of the vehicle. This placement ensures:

• stable fastening of seat belts for two rear seating positions,
• easy access to the buckles for passengers, without needing to reach deep into the seat,
• correct belt webbing routing, in line with the factory geometry of Audi A6 C6 seats.

This component belongs to the Seat Belts and Parts category, meaning it works in conjunction with factory seat belt pretensioners and webbing, maintaining the structural integrity of the entire system.

Technical and Functional Characteristics

The double rear seat belt buckle has been developed as an OEM component, ensuring a perfect fit with the factory mounting points in the Audi body. The design includes:

• precise alignment with the rear seat, requiring no upholstery modifications,
• appropriately selected rigidity of the buckle housing, limiting unwanted buckle movement during driving,
• ergonomic shape of the buckle heads, facilitating quick belt insertion and release.

By maintaining the original geometry, the buckle is compatible with factory seat belt sensors (if present in the specific vehicle configuration), ensuring proper operation of warning lights and seat belt reminder systems.

Component Condition and Service Application

The offered Audi A6 C6 Rear Double Seat Belt Buckle is a used part, sourced from disassembly, and is intended for service applications as a replacement part in vehicles where wear, mechanical damage, or activation of the safety system has occurred. Replacing the buckle is particularly recommended when:

• the buckle does not securely hold the belt tongue or there are difficulties in releasing it,
• the buckle housing is cracked or shows signs of deformation,
• after a collision, there is suspicion of overloading the belt fastening element.

Using an original component ensures the factory operating parameters of the safety system are maintained, without the risk of poor fit or loose mountings.

Benefits of Installing an Original Seat Belt Buckle

Choosing a factory rear seat belt buckle for the Audi A6 C6 offers a range of practical benefits:

• compatibility with the body structure – no modifications to mounting points are required,
• consistency with other system components – belts, pretensioners, and sensors operate within the manufacturer's specified range,
• maintaining predictable vehicle behavior in emergency situations due to correct belt fastening,
• aesthetic integration with the interior – the shape and routing of the buckle match the factory design of the Audi cabin.

For workshops and service centers specializing in the Audi brand, using such a component facilitates high-quality repairs, in line with manufacturer guidelines.

Other Audi Seat Belts and Parts

If you also need other components from the Audi Seat Belts and Parts category, check out the Audi Seat Belts and Parts available in our store to select a complete solution for your vehicle.

Technical Support and Service Knowledge

For comprehensive powertrain repairs and interior work, it is important to consider the compatibility of all sub-assemblies. Our service guide may be helpful: Clutch and Dual-Mass Flywheel – Diagnostics and Part Selection for the Powertrain, which aids in planning repairs and upgrades for vehicles with advanced drivetrain systems.