BMW 1 Series F20 F21 LCI Guide For Rear Bumper Side Left N/S 8063451

BMW F20 F21 Left Rear Bumper Mounting Bracket Rear Left is an original body part from the Bumpers and Reinforcements group, designed for precise guidance and support of the rear bumper on the left side. It enables stable seating of the bumper cover, reduces unwanted play, and helps maintain the correct body line geometry in BMW F20/F21 models.

Specifications and technical data

• SKU: 8063451
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8063451
• Substitutable numbers: 51128063451, 8063451, EM, 12908509722, 8509722
• Location on the vehicle: Rear, Left
• Category: Bumpers & Reinforcements

Purpose and Function of the Part

The left rear bumper mounting bracket is responsible for the correct positioning of the bumper relative to the fender, trunk lid, and other body panels. It is a technical structural element that:

• stabilizes the bumper in the rear area on the driver's side,
• ensures repeatable, factory-standard edge fitment,
• minimizes the risk of the bumper sagging or protruding after repair,
• facilitates the removal and reinstallation of the cover during further service work.

Thanks to its proper profile and fit for the specific BMW generation, the bracket allows for a consistent flow of gaps between body elements and improves the overall rigidity of the mounting.

Construction and Fitment for BMW F20/F21

The part has been specifically designed for the BMW F20/F21 platform, taking into account the characteristic rear body structure. The appropriate placement of mounting points and the shape of the guides ensure that:

• installation occurs in factory-designated mounting locations,
• no modification of the body structure is required,
• compatibility with the original rear bumper for this series is maintained.

As part of the Bumpers and Reinforcements group, the bracket works with other mounting elements, brackets, and reinforcements, creating a cohesive support system for the bumper cover.

Condition, Origin, and Benefits of Use

The offered bracket is a used part, which in practice means a favorable combination of functionality and attractive price compared to a new component. Choosing an original part from a dismantled vehicle allows you to:

• maintain compliance with factory BMW specifications,
• preserve proper bumper fitment without the need for aftermarket part adjustments,
• reduce repair costs while maintaining appropriate installation quality.

This solution is particularly recommended for accident repairs, alignment corrections after previous interventions, or replacement of a damaged left rear mounting on the vehicle.

Professional Installation and Practical Application

The left rear bumper mounting bracket is intended for installation in the rear body area, on the driver's side. During installation, it is recommended to:

• check the condition of other bumper mounting points,
• verify the geometry of the gaps between the bumper and the fender and trunk lid,
• confirm the correct engagement of all clips after the final seating of the bumper.

This approach helps restore the correct body line and reduces the risk of the mounting loosening again in the future, which is important for both aesthetic and functional reasons.

If you are planning a comprehensive repair or upgrade of the rear bumper area on your BMW and need other parts from the same group, such as guides, brackets, or additional mountings, check the available parts in the BMW Bumpers and Reinforcements category.

For users who want to combine body repair with a more conscious approach to vehicle operation and the use of recycled parts, valuable tips on this approach can be found in the article Eco-tuning in practice: how to increase performance while reducing your carbon footprint with recycled parts.