BMW 3 E46 Convertible Folding Hardtop Roof Bracket Right O/S Hydraulic Cylinder

BMW 3 E46 Convertible Folding Hardtop Roof Bracket Right O/S Hydraulic Cylinder is an original structural component of the folding roof mechanism, designed for installation on the right side of the vehicle. This precision-engineered bracket provides stable support for the hydraulic cylinder, which translates into reliable operation of the roof opening and closing system. By using a factory-spec solution, the proper geometry and stiffness of the mounting are maintained, which is crucial for the correct operation of the entire system.

Specifications and technical data

• SKU: 8239240
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8239240
• Substitutable numbers: 51178239240, 8239240, 8236956
• Location on the vehicle: Right
• Category: Other Exterior Parts & Accessories

Purpose and function of the component

The hydraulic cylinder roof bracket in the BMW 3 E46 Convertible is responsible for keeping the actuator in the correct operating position. Its placement on the right side of the vehicle ensures compatibility with the factory guide system, hinges, and roof frame, which is essential for maintaining the synchronized operation of both sides of the mechanism.

This component transfers the loads resulting from the operation of the hydraulic cylinder during the raising and folding of the roof; therefore, its proper stiffness and fit have a direct impact on:

• the smoothness of the roof structure movement,
• the reduction of play and unwanted stress,
• the reduction of the risk of leaks or improper roof closing.

Advantages of using an original bracket

Using an original bracket in the BMW 3 E46 Convertible allows you to maintain the parameters specified by the vehicle manufacturer. This means:

• factory fit to the mounting points on the right side of the body and roof structure,
• compliance with the geometry of the hydraulic system and hinge kinematics,
• no need for modifications or adjustments to mounting holes.

As a result, the installation process is predictable, and the risk of roof operation issues after replacing the component is minimized.

Installation and operational characteristics

The bracket is intended for installation in the folding roof mechanism area on the right side of the vehicle. The design of the component is prepared to work with the factory hydraulic cylinder, which facilitates maintaining the correct axis of actuator operation and proper roof movement guidance.

When replacing, it is recommended to:

• check the condition of the mounts in the body and adjacent components,
• verify the correct positioning of the hydraulic cylinder relative to the bracket,
• verify the operation of the roof in the full range after completing the installation.

Such an approach allows for maintaining the stability and repeatability of the roof mechanism's operation in daily use.

Why choose BMW OEM solutions

Original BMW components are designed for long-term cooperation with other system elements. In the case of the hydraulic cylinder roof bracket, this means:

• maintaining the dimensional tolerances specified by the manufacturer,
• compatibility with the factory hydraulic system and the convertible roof structure,
• consistency with other body and folding roof mechanism components.

For the user, this translates into more predictable roof behavior over time, a reduced risk of improper closing, and lower loads on other system 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 additional brackets, mounts, or structural components, check the available parts in the Other BMW category.

Technical knowledge and part selection

When working with advanced drive and hydraulic systems, it is worth expanding your knowledge about the structural differences between individual model versions. A good point of reference can be the analysis of solutions used in high-performance cars – you can find more on this topic in the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses, among other things, the differences in engine, brake, and chassis construction.