Audi A4 B8 Avant Seat Belt Buckle Middle Twin Latch Rear 8K0857739AE

The Audi A4 B8 Avant Rear Seat Belt Buckle is an original part from the Seat Belts and Parts category, designed for the rear of the vehicle. It ensures proper seat belt fastening, which translates to stable passenger restraint and manufacturer-compliant operation of the safety system.

Specifications and technical data

• SKU: 8K0857739AE
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0857739AE
• Substitutable numbers: 8K0857739AE, 8K0 857 739 AE
• Location on the vehicle: Rear
• Category: Seat Belts & Parts

Purpose and Function of the Audi A4 B8 Avant Rear Seat Belt Buckle

The rear seat belt buckle in the Audi A4 B8 Avant is responsible for mechanical and audible confirmation of seat belt fastening. A correctly functioning component enables:

• Secure anchoring of the belt buckle in the factory mounting point on the rear seat,
• Cooperation with the seat belt reminder system (if present in the vehicle's configuration),
• Stable belt retention during driving, braking, and collisions, in line with Audi's design specifications.

Construction and Fit for the Rear of the Vehicle

The buckle is designed as a dedicated component for a specific avant body generation, considering the rear seat geometry and floor mounting points. Thanks to this:

• It fits factory mounts without requiring structural modifications,
• It ensures proper seat belt routing relative to the backrest and seat cushion,
• It maintains appropriate connection rigidity, which is important under dynamic loads.

Its original Audi origin promotes consistency with other safety system components, such as retractors, pretensioners, or ISOFIX mounts (if present in the specific configuration).

Benefits of Using an Original Seat Belt Buckle

Replacing a worn or damaged buckle with an original part from the Seat Belts and Parts category restores the factory-set protection parameters for rear seat passengers. Key benefits include:

• Compatibility with the rear seat structure and factory mounting points in the Audi A4 B8 Avant,
• Predictable belt system behavior in emergency situations, in line with Audi engineers' intentions,
• Integration with the vehicle's electronic systems, which may monitor rear seat belt status.

This solution is particularly important in family-used vehicles where the rear seat is heavily utilized, and the correct functioning of seat belts directly impacts the protection of children and adults.

Used Condition and Installation Aspects

The rear seat belt buckle is offered in a used condition, allowing for an economical replacement while maintaining the original manufacturer's specifications. Before installation, it is recommended to:

• Verify the locking mechanism for smooth operation and correct buckle engagement,
• Inspect the body mounting point and the fastening bolt for any corrosion or damage,
• Check compatibility with the currently installed seat belt in the vehicle.

Installation should be performed adhering to the torque specifications set by the vehicle manufacturer and the principles for passive safety system components.

More Products and Technical Knowledge

If you are looking for other parts from the Seat Belts and Parts category dedicated to the Audi brand, check out the Audi seat belts and parts available in our store to select a complete solution for your model.

For a comprehensive approach to vehicle safety, it is also worth ensuring proper lighting. Practical tips on selecting and replacing used LED and Xenon headlights can be found in the article See More and Better – A Complete Guide to Selecting and Replacing Used LED and Xenon Headlights, which will help optimize visibility and safety during night driving.