BMW 3 4 E93 F33 Folding Top Hardtop Roof Shell Rear Window Cover Alpine White

BMW 3 and 4 Series Convertible Hardtop Rear Panel in Alpinweiss 3 is an original body part designed for E93 and F33 models. It is a crucial component of the convertible hardtop structure, responsible for the proper closure of the rear section of the hardtop and the aesthetic framing of the rear window, ensuring a cohesive body appearance and stable mounting of other components.

Specifications and technical data

• SKU: 7400556-AW
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7400556
• Substitutable numbers: 41007400556, 7400556, BG
• Weight: 150
• Location on the vehicle: Rear
• Color: Alpinweiss 3 - 300
• Category: Other Exterior Parts & Accessories

Purpose and Function in BMW Bodywork

The described rear panel for the convertible hardtop is dedicated to BMW 3 Series E93 and 4 Series F33 convertibles equipped with a hard, retractable roof. This element operates in the rear body area, within the roof folding mechanism, where it is responsible for:

• stable closure of the rear part of the hardtop while driving,
• proper guidance and seating of the rear window,
• maintaining the factory geometry of the roofline and trunk lid,
• protecting the retractable roof mechanism from external factors.

By preserving the original geometry, the panel allows for precise fitting with adjacent body elements, which is important for both sealing and the correct operation of the entire retractable roof system.

Color and Paint Matching

The element is finished in the factory color Alpinweiss 3, characteristic of many BMW 3 and 4 Series vehicles. Using the original shade of white facilitates matching with the vehicle's existing paint coat, which in many cases can reduce the scope of painting work or simplify its preparation. A uniform color of the roof and body is particularly important in a convertible, where the hardtop line remains highly exposed.

Assembly and Structural Aspects

The rear panel of the convertible hardtop has been designed as part of the OEM BMW structure, which translates to:

• maintaining factory mounting points in the rear body area,
• compatibility with the original roof folding mechanism,
• the possibility of restoring original structural rigidity in the rear window area,
• predictable behavior of the element during the operation of the entire roof system.

The appropriately selected mass of the component contributes to maintaining the correct operating characteristics of the actuators and hinges of the retractable roof, which is important for the durability of the entire system and the proper closure of the hardtop in various positions.

Practical Application and Benefits of Replacement

Replacement of the rear panel of the convertible hardtop is particularly recommended after mechanical damage, rear-end collisions, or structural deformations of the roof that affect:

• leaks around the rear window,
• problems with roof closure or jamming,
• visible distortions of the body line in the hardtop area,
• deterioration of the aesthetic appearance of the rear of the convertible.

Using an original panel allows for the restoration of the roof's factory appearance and functionality, and also facilitates further bodywork and painting, as the structure is consistent with the manufacturer's documentation. This solution is particularly beneficial for professional accident repairs and for the restoration of BMW convertibles, where precision of fit and preservation of the original body line are crucial.

Complementary BMW Body Parts

If you are planning a comprehensive repair or upgrade of the rear body section of your BMW and need other parts from the same group, such as additional panels, covers, or structural reinforcements, check the available parts in the Other BMW category.

For comparison of the characteristics of sports powertrains and chassis, as well as a better understanding of the differences between standard and sport versions, an article on our blog may be helpful – check out the material Audi RS vs. Other Models – What Lies Under the Hood and Chassis? to better plan future modifications and parts selection for your project.