BMW 6 Series E64 Left N/S Hydraulic Cylinder Strut Soft Top Roof Folding

The BMW 6 Series E64 Left N/S Hydraulic Cylinder Strut Soft Top Roof Folding is a specialized component of the convertible soft top opening and closing system. It is responsible for the precise guidance and support of the structure on the driver's side, ensuring smooth folding and unfolding of the roof cover. By maintaining the factory geometry of the mechanism, it serves as a functional service solution for roof system repairs.

Specifications and technical data

• SKU: 7019805
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7019805
• Substitutable numbers: 54347019805, 7019805
• Location on the vehicle: Left
• Category: Convertible Tops & Parts

Purpose and function in the vehicle

The presented BMW 6 Series E64 Left N/S Hydraulic Cylinder Strut Soft Top Roof Folding operates within the convertible roof folding system, working in conjunction with other cylinders, arms, and hinges. Its task is to provide stable support for the structure on the left side of the vehicle body and to control the movement of the frame elements during the opening and closing cycle.

Its placement on the left side allows for the maintenance of the proper kinematics of the entire mechanism, which translates into even load distribution and correct roof operation throughout the full range of motion. This element is particularly important when troubleshooting issues related to uneven lifting, jamming, or sagging of one side of the roof.

Construction and technical characteristics

The cylinder belongs to a group of hydraulic components responsible for transferring force from the pump system to the roof structure. The use of a hydraulic solution allows for smooth, controlled movement while maintaining the appropriate rigidity of the entire system. The construction is prepared for operation in demanding conditions typical for convertibles – variable temperatures, humidity, and dynamic loads.

As a part from the Convertible soft tops and parts category, the cylinder contributes to a complete roof folding system, where the tightness of the hydraulic system, proper bleeding, and correct mechanical alignment relative to other frame components are crucial.

Service application and installation

The cylinder is designed for installation on the left side of the vehicle, in the factory-designated mounting location. In workshop practice, it is used for:

• repairing the roof folding system after the failure of one of the cylinders,
• resolving problems with asymmetrical roof operation on the driver's side,
• comprehensive work on the regeneration of the soft top mechanism.

Due to the nature of the hydraulic system, installation requires adherence to bleeding procedures and checking the tightness of lines and connectors. A correctly selected and installed cylinder allows for the restoration of proper roof operation without interfering with the body structure.

Benefits of using an original BMW component

The use of an original BMW component ensures compliance with the vehicle's factory specifications, which facilitates installation and reduces the risk of fitment issues. You receive an element designed specifically for the given convertible model, with the correct operating characteristics and mounting geometry.

Choosing a used hydraulic cylinder with preserved functionality is a cost-effective solution, allowing for the restoration of the roof system's efficiency while maintaining the original design. This is particularly important in the case of advanced mechanisms, where precision of workmanship and compatibility with control electronics have a direct impact on the reliability of the entire system.

Roof system expansion and related 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 cylinders, guides, or frame elements, check the available parts in the Convertible soft tops and BMW parts category.

When selecting used components for body and roof systems, it is worth being guided by the experience of manufacturers known for durability. A good point of reference may be an article describing when choosing second-hand components is most cost-effective and safe – this is discussed in detail in the entry Volkswagen – solidity and reliability. Why are used VW parts a reasonable choice?, which shows the general principles of reasonable selection of used parts also in the context of other brands.