Audi A3 8V Seat Belt Safety Buckle Lock Rear Right Left N/O/S 4G8857739

Visual condition of the part 

The product shows signs of use visible in the photos. 

Audi A3 8V Seat Belt Safety Buckle Lock Rear Right Left is an original component from the Seat belts and parts group, designed for installation in the rear section of the vehicle. It ensures a secure, reliable seat belt fastening, which translates into stable passenger retention and improves the overall level of safety in the cabin.

Specifications and technical data

• SKU: 4G8857739
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G8857739
• Substitutable numbers: 4G8857739, 4G8 857 739
• Location on the vehicle: Rear, Right
• Category: Seat Belts & Parts

Purpose and function in the safety system

The presented buckle lock is a component mounted in the rear of the vehicle on the right side, responsible for mechanically locking the seat belt once it is inserted. As an original Audi part, it works with the factory seat belt, maintaining the correct mounting geometry and appropriate retention force during daily use and in emergency situations.

This element is particularly important in the context of protecting rear-seat passengers – a properly functioning buckle minimizes the risk of accidental belt release, thereby reducing the forces acting on the body during sudden braking or a collision.

Construction and mounting compatibility

The seat belt buckle lock has been designed as a component dedicated to the specific Audi A3 8V body model, which ensures a proper fit to the factory mounting points. As a result, installation is straightforward, without the need for structural modifications or the use of additional adapters.

The original design ensures:

• maintenance of the correct buckle position relative to the seat and backrest,
• proper interaction with the seat belt tongue,
• consistency with the vehicle's factory interior installation.

Performance characteristics and advantages of use

As an element from the Seat belts and parts category, the buckle lock is responsible for the daily comfort of using the seat belt – inserting and releasing should be done with a noticeable, secure click of the mechanism. A properly selected lock limits play, reduces unwanted noise while driving, and allows for the predictable operation of the safety system.

Key advantages of this solution include:

• factory fit for the rear right seating area,
• preservation of the original safety system functionality,
• consistency with other interior equipment elements of the Audi A3 8V.

Condition, origin, and part selection

The offered seat belt buckle lock is a used component, which allows for an economical yet technically sound repair of the vehicle's safety system. Choosing an original component from this brand reduces the risk of fitment issues and ensures compliance with factory design specifications.

When selecting, it is worth paying attention to the placement on the vehicle – in this case, it is the rear – right side, which is significant for both mounting geometry and passenger ergonomics.

Integration with other Audi safety components

Replacing the buckle lock in an Audi A3 8V is often part of broader work on the passive safety system. If you are planning a comprehensive repair or upgrade of the rear passenger safety zone in your Audi and need other elements from the same group, such as tensioners, belts, or additional mounts, check the available parts in the Audi seat belts and parts category.

For users who want to deepen their knowledge about selecting drivetrain components and the relationships between individual subassemblies, the guide article Clutch and dual-mass flywheel – diagnostics and selection of parts for the drivetrain, which describes a practical approach to diagnostics and replacement of key components, may be helpful.

If you want to make informed choices when selecting components from the secondary market and optimize the purchasing process, it is worth reading the guide Safe purchase of used car parts online – a step-by-step guide, which discusses, among other things, selection by catalog numbers, seller verification, and practical application examples.