BMW Z4 E89 Roadster Folding Hard Top Roof Frame Right Arm Hinge Lock

BMW Z4 E89 Roadster Folding Hard Top Roof Frame Right Arm Hinge Lock is a precision roof mechanism component designed for the right side of the vehicle body. It is responsible for stable guidance and secure locking of the folding roof, which is crucial for user comfort and the structural integrity of the assembly. This used OEM component ensures the correct operating geometry of the mechanism and a perfect fit with factory mounting points.

Specifications and technical data

• SKU: 7245945-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7245945
• Substitutable numbers: 54347245945, 7245945, 54377188244, 7188244
• Location on the vehicle: Right
• Color: Black
• Category: Other Exterior Parts & Accessories

Purpose and function of the component

The right folding roof arm, integrated with the hinge and lock, operates in a critical area of the body, responsible for the proper folding and unfolding of the roof in the BMW Z4 E89 Roadster. This component transfers loads resulting from the movement of the roof structure, maintains the correct position of the panels, and works in conjunction with other kinematic system components. This ensures that the roof closes with the appropriate force and the lock keeps it in a stable position while driving.

Precise fitment to the right side of the vehicle reduces the risk of stress, jamming, and improper closing, which is particularly important in cars with complex folding roof mechanisms. A correctly selected arm with a lock allows for the restoration of the entire system's proper operation without the need for structural body modifications.

Construction, color, and body integration

The element is finished in black, which facilitates aesthetic integration with factory guides, seals, and other roof mechanism components. This color is visually neutral and blends well with both light and dark interiors, without distracting from the body lines.

The arm with the hinge and lock was designed as part of the OEM system, therefore it maintains the correct rigidity, geometry, and mounting points. The factory design promotes trouble-free installation and minimizes the need for additional adjustments, provided that the other elements of the roof mechanism are functional and correctly set.

Condition, fitment, and service application

The offered component is used, which in practice means it has been removed from a vehicle and verified for further serviceability. This type of part is particularly useful in situations where there has been mechanical damage to the arm, hinge wear, or lock issues following a collision, overload, or years of operation.

Selecting the correct right arm is important not only due to the installation side but also because of the specific roof construction in the BMW Z4 E89 Roadster. Using a component consistent with the factory design helps reduce the risk of leaks, noise while driving, and errors in the operation of the roof opening and closing system.

Technical support and knowledge development

When working with body mechanisms and systems of increased complexity, it is worth expanding your knowledge of solutions used by various manufacturers. To compare approaches to the design of high-performance cars and advanced technology, it is worth reading the following material: Audi RS vs other models – what is hidden under the hood and chassis?. This allows for a better understanding of how manufacturers design key vehicle systems and the importance of using the right components.

If you are planning a comprehensive repair or upgrade of the folding roof area in your BMW and need other elements from the same group, such as arms, hinges, or locking mechanisms, check the available parts in the Other BMW category.