Audi A4 B7 Convertible Roof Mechanism Hydraulic Cylinder Set 8H0871795

Audi A4 B7 Convertible Roof Mechanism Hydraulic Cylinder Set is a set of original components from the Panoramic roofs, sunroofs and parts group, designed for the convertible roof system. The set constitutes a coherent hydraulic operating module that allows for restoring the proper operation of the roof opening and closing mechanism without the need for interference with other body components.

Specifications and technical data

• SKU: 8H0871795-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8H0871795
• Substitutable numbers: 8H0871795, 8H0 871 795, 8H0871795B, 8H0 871 795 B, 8H0 898 803 A, 8H0871605B, 8H0 871 605 B, 8H0871603B, 8H0 871 603 B, 8H0871619A, 8H0 871 619 A
• Category: Sunroofs & Parts

Purpose and function of the set

The presented set is dedicated to the roof system in the Audi A4 B7 generation Convertible model and is responsible for the movement of the roof covering and load-bearing elements. The hydraulic cylinders work with the vehicle's existing pump and lines, ensuring controlled, smooth movement of the roof structure throughout its full operating range.

This type of solution is particularly useful in cases of symptoms such as uneven lifting, the roof stopping mid-cycle, or visible leaks from operating components. Using a complete set of cylinders allows you to reduce diagnostic time and focus on the direct replacement of worn-out components.

Construction and technical characteristics

The hydraulic cylinder set forms a team of cooperating elements that transfer operating pressure from the hydraulic system to the mechanical movement of the roof structure. Each cylinder is factory-fitted to a specific mounting point in the body and to the geometry of the roof rails, which ensures the proper kinematics of the entire mechanism.

The original Audi origin means maintaining factory parameters of stroke, force, and operating characteristics, which is crucial for the proper synchronization of all moving parts. The set has an assigned OEM part number and associated interchangeable numbers, allowing for precise verification of compatibility with a specific vehicle configuration.

Benefits of using the original set

Choosing a complete, original hydraulic cylinder set for the Audi A4 B7 Convertible roof allows you to maintain the structural integrity of the entire system. Factory fitment minimizes the risk of stress at mounting points, leaks, or improper operation of position sensors, which has a direct impact on the durability of the mechanism.

By using a set from the same group of components, the user also gains predictable roof behavior in various operating conditions – from low temperatures to intense sunlight. Consistency of hydraulic parameters also facilitates any subsequent diagnostics, as the system operates within the range provided by the vehicle manufacturer.

Condition, installation, and selection of parts

The item comes from disassembly and is classified as used, which allows for an economical restoration of the roof system's efficiency while maintaining the original specification. Before installation, it is recommended to perform a standard check of tightness, the condition of connections, and the correctness of initial operation on the vehicle or at a service station.

To properly select the set for a specific Audi A4 B7 Convertible, it is worth using the OEM part number and the available interchangeable numbers visible in the technical specifications section. This helps avoid compatibility issues resulting from equipment differences or production changes within the same model generation.

If you are planning a comprehensive repair or upgrade of the roof area in your Audi and need other elements from the same group, such as rails, seals, or control modules, check the available parts in the Panoramic roofs, sunroofs and parts Audi category.

Technical support and knowledge about used parts

When working with disassembled elements, such as the hydraulic roof cylinder set, it is worth knowing the general rules for selecting and verifying used components. It may be helpful to read the material describing when purchasing a used component is profitable, how to assess its condition, and what to pay attention to during installation and functional tests – this is discussed more broadly in the article Used gearbox – when is it worth it and what you need to remember, the conclusions of which can largely be applied to other key vehicle systems as well.