VW Volkswagen Passat B7 36 Seat Belt Inertia Reel Rear Right O/S 3C9857806J

VW Volkswagen Passat B7 36 Seat Belt Inertia Reel Rear Right O/S is an original part from the Seat belts and parts group, designed for installation on the rear right side of the vehicle. Thanks to its factory design and fitment to the mounting system in the Passat B7, it ensures consistency with the existing installation and maintains the safety parameters specified by the manufacturer. It is a practical solution for replacing a damaged seat belt after a collision or due to operational wear.

Specifications and technical data

• SKU: 3C9857806J
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 3C9857806J
• Substitutable numbers: 3C9857806J, 3C9 857 806 J
• Location on the vehicle: Rear, Right
• Category: Seat Belts & Parts

Purpose and fitment for Volkswagen Passat B7

The presented seat belt has been designed specifically for the rear right part of the Volkswagen Passat B7 generation body. This means that the geometry of the inertia reel, the length of the webbing, and the mounting points are adapted to the factory brackets in the body and rear seat, which facilitates installation and allows for maintaining the original belt path relative to the seat and the side pillar.

Thanks to the use of an original Volkswagen solution, compatibility with standard buckles, tensioners, and interior trim elements is maintained. In practice, this translates into proper belt guidance, correct operation of the locking mechanism during sudden braking, and proper interaction with other seat belt mounting points in the rear part of the cabin.

Inertia reel construction and safety function

The seat belt is integrated with an inertia reel mounted in the rear right part of the vehicle. The reel is responsible for the controlled unwinding and winding of the webbing, keeping it at the appropriate tension while driving and locking it in emergency situations. Such a design allows for:

• stable retention of the belt against the passenger's body,
• reduction of slack during normal operation,
• instant locking during sudden deceleration or vehicle tilting.

The properly selected characteristics of the inertia reel support the operation of the vehicle's passive safety systems, ensuring predictable belt behavior in critical situations. Using an original component helps maintain the integrity of the entire safety system in the rear of the cabin.

Practical application and installation

This seat belt model is intended for replacing a factory element after mechanical damage, system activation during a collision, or visible wear of the webbing. Using an original component from the same assembly group allows for:

• maintaining the factory belt routing geometry,
• reducing the need for modifications to upholstery and mounts,
• maintaining compliance with factory anchoring points in the rear right part of the body.

The element is intended for installation in the place of the standard belt, which facilitates service work and shortens replacement time. Proper tightening of the mounting bolts and correct routing of the webbing through the guides is crucial for maintaining the protective functions of the system.

Characteristics of the used product

The offered seat belt is a used item, which in practice means it comes from vehicle dismantling and may show signs of normal wear. At the same time, it retains the functionality required for further use as a safety element for the rear passenger on the right side. For many users, this is a technically and economically reasonable way to restore the efficiency of the seat belt system while maintaining the original Volkswagen design.

Expanding the Volkswagen seat belt system

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

Technical knowledge and safety system operation

When working with safety-critical components – such as seat belts, tensioners, or control modules – it is worth using verified sources of technical information. For users interested in a broader perspective on using dismantled parts in modern cars, including the context of electronics and control systems, our blog article may be helpful: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?. Although it concerns a different brand, it well illustrates the approach to the safe use of used components in advanced vehicle systems.