BMW F45 Skirt Sill Support Rear Left Side Mount Bracket Holder LH3 7301943

BMW F45 Rear Left Sill Bracket Mounting LH3 is an original body structural component, designed for installation in the rear left sill area. Thanks to its factory fit, it ensures stable sill support and proper load transfer in this part of the body, which is important for both body geometry and the durability of sheet metal connections. This solution is particularly useful for post-accident repairs, replacing corroded elements, or precise reconstruction of the vehicle's side structure.

Specifications and technical data

• SKU: 7301943
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7301943
• Substitutable numbers: 7301943, 51777301943
• Location on the vehicle: Rear, Left
• Category: Running Boards & Side Bars

Purpose and Vehicle Placement

The presented bracket is an element from the Sill Mouldings group, designed specifically for use in BMW models from the F45 family. Its placement in the rear-left area of the body means it is responsible for supporting and mounting the sill on the driver's side at the rear of the vehicle. This position is important for:

• maintaining the proper lateral rigidity of the structure,
• correct alignment of the sill with adjacent body elements,
• stable mounting of sill covers and mouldings at the rear of the vehicle.

Technical and Functional Characteristics

The sill bracket serves a load-bearing and mounting function – it is a reference point for attaching sill elements and partially absorbs loads acting on the side area of the body. The OEM construction ensures:

• dimensional accuracy with factory mounting points for BMW F45,
• appropriate geometry for maintaining sill lines and gaps between elements,
• suitability for professional body and structural repairs.

Thanks to this, the bracket will be effective both for local replacement of a damaged section and for more extensive reconstruction of the rear sill area.

Element Condition and Service Application

The offered bracket is a used part, which in practice means it comes from a vehicle dismantling and can be an attractive cost alternative to a new OEM component. Such elements are often chosen by body shops and individual users who:

• reconstruct the body after a collision,
• replace corroded or deformed sill sections,
• aim to preserve the original construction and mounting points in their BMW.

The Rear Left Sill Bracket Mounting LH3 allows for structural consistency with other body elements, which is important for subsequent geometry alignment and wheel alignment checks of the body.

Benefits of Using an Original BMW Bracket

Using an original sill bracket in the BMW F45 offers a number of practical service benefits:

• Factory Fit – no need for modifications, adjustments, or alterations to mounting points.
• Structural Consistency – maintaining the original rigidity and performance characteristics of the sill area.
• Easier Installation – predictable repair process and the ability to use standard BMW repair procedures.

For workshops, this means reduced repair time and a lower risk of problems with the subsequent installation of covers, mouldings, or elements adjacent to the sill.

BMW Sill Area Expansion – Related Parts

If you are planning a comprehensive repair or upgrade of the sill area in your BMW and need other parts from the same group, such as covers, trims, or additional mouldings, check the available parts in the BMW Sill Mouldings category.

For users interested in a broader context of construction and parts development in the premium segment, an article describing the changes in the construction and equipment of flagship Mercedes models may be useful – you can find it here: Evolution of the Mercedes S-Class: from W140 to W222 – Innovations and Parts Over the Years.