BMW X3 E83 Insert Lateral Bumper Mount Support Bracket Rear Left 3400943

BMW X3 E83 Insert Lateral Bumper Mount Support Bracket Rear Left is an original body component designed for the precise support and guidance of the rear bumper on the left side. Thanks to its factory geometry, it ensures proper alignment of the bumper with the bodywork and stable mounting under daily operating conditions. This is a practical solution for users who want to restore the correct body lines after a collision, disassembly, or bodywork and paint repairs.

Specifications and technical data

• SKU: 3400943
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 3400943
• Substitutable numbers: 51123400943, 3400943, AS
• Location on the vehicle: Rear, Left
• Category: Bumper Inserts & Covers

Purpose and function of the component

The presented slide, acting as a support bracket and mount, operates in the rear part of the body on the left side, where it is responsible for stable bumper guidance relative to the vehicle structure. The appropriately selected shape and mounting points allow for even load distribution, reducing the risk of bumper cracks and unwanted play while driving.

The component is dedicated to BMW construction, which translates into maintaining factory gaps between the bumper and the fender and the trunk lid. Proper positioning of the slide also facilitates subsequent service disassembly, as the bumper rests on the support points provided by the manufacturer.

Benefits of using an original slide

Using an original bumper bracket in the BMW E83 allows you to avoid problems typical of replacements with inaccurate geometry. Key advantages include:

• Factory fit to the bodywork – maintaining the correct bumper line and even gaps.
• Stable mounting in the rear left part of the vehicle – reduction of vibrations and bumper movement on uneven surfaces.
• Easy assembly and disassembly – mounting points consistent with the original BMW design.
• Possibility to restore original rigidity after body repairs or bumper replacement.

Thanks to this slide, you can complete the repair of the rear body section in an orderly manner, without the need for additional modifications or forcing the component into place.

Assembly characteristics

The slide is designed to work in the rear bumper area on the left side, which clearly defines its position in the vehicle. The bracket design has been engineered to work with factory mounting points in the body and bumper, which promotes efficient assembly in workshop conditions. A correctly installed component provides proper bumper support both vertically and horizontally.

Due to its specific shape, the slide should be used exactly in the intended location – swapping sides or attempting to adapt it to another body area may result in improper fitment and loss of functionality.

Condition and service application

The component comes from disassembly, making it an attractive solution for users looking for an economical rear bumper repair while maintaining the original BMW design. This type of part is particularly suitable for:

• post-accident repairs of the rear part of the vehicle,
• replacement of a damaged or deformed bumper,
• correcting body alignment after previous, improper repairs.

Choosing an original slide from this group allows you to maintain the structural integrity of the body and reduce the risk of future bumper mounting problems.

Expanding your BMW rear bumper repair

If you are planning a comprehensive repair or upgrade of the rear bumper zone in your BMW and need other components from the same group, such as additional inserts, covers, or mounting brackets, check out the available parts in the BMW bumper inserts and covers category.