BMW 3 Series E46 Touring Rear Seat Belt Buckle Left N/S 7000403

BMW E46 Rear Left Seat Belt Buckle is an original part from the Seat Belts and Parts group, designed for installation on the rear left side of the vehicle. It enables proper seat belt fastening, ensuring stable mounting and compliance with BMW's factory design.

Specifications and technical data

• SKU: 7000403-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7000403
• Substitutable numbers: 72117000403, 7000403, 72118242720, 8242720
• Location on the vehicle: Rear, Left
• Category: Seat Belts & Parts

Purpose and Function of the Seat Belt Buckle

The rear left seat belt buckle in the BMW E46 is responsible for the mechanical locking of the belt buckle and its safe release upon pressing the button. It is a component that works with the factory seat belt, mounted in the rear part of the cabin on the left side, in accordance with BMW's body construction.

A properly selected buckle guarantees:

• correct positioning of the belt buckle relative to the seat,
• stable mounting to the body structure,
• consistency with BMW's original passive safety system.

Compatibility and Fit for BMW

The presented buckle has been designed specifically for the BMW E46 series, taking into account the rear left side of the vehicle. This means its geometry, mounting method, and angle relative to the seat are adapted to the factory interior layout, which facilitates installation and ensures proper user ergonomics.

By using an original BMW solution, the following are maintained:

• compliance with factory mounting points,
• proper interaction with the seat belt and buckle,
• consistency with the safety systems designed for the specific model.

Characteristics of a Used Part

The seat belt buckle is offered as a used part, sourced from dismantling. These types of components retain their factory construction and functional parameters, while also offering an economical solution for repairs or replacement of damaged parts in a BMW E46.

Choosing an original, used buckle allows for consistency with other safety system components, without the need to use aftermarket alternatives with uncertain parameters.

Safety and Technical Aspects of Installation

Due to its importance for passenger safety, the seat belt buckle should be installed following BMW's service procedures. It is crucial to ensure the mounting is correctly tightened to the body and to check the proper functioning of the locking mechanism and the release button.

When replacing the part, it is worth paying attention to:

• absence of mechanical damage to the housing and mechanism,
• smooth operation of the buckle release button,
• secure retention of the belt tongue after insertion.

If you are planning a comprehensive repair or upgrade of the rear seat passenger safety area in your BMW and need other parts from the same group, such as pretensioners, retractors, or additional mountings, check the available parts in the BMW Seat Belts and Parts category.

For a fuller understanding of the importance of original components in BMW safety systems and lighting, it is worth reading the guide on our blog: See More and Better – A Complete Guide to Selecting and Replacing Used LED and Xenon Headlights.