Stabilus 6B-4731PZ Convertible Top Cover Strut

Convertible Top Cover Strut for BMW Roof Applications

This Stabilus convertible top cover strut is built for BMW roof systems that need controlled lift and support at the convertible top cover. The 6B-4731PZ uses a 200 N (45 lb) force rating, plastic socket connections, and OE-style dimensions for a direct replacement on select BMW 3 Series and 4 Series convertible models, including BMW 428i, 435i, 430i, 440i, and M4 applications.

Key Features

• Brand: Stabilus
• Part number: 6B-4731PZ
• Convertible top cover strut for body/roof applications
• Force rating: 200 N / 45 lb
• Extended length: 115.5 mm (4.547 in)
• Compressed length: 94 mm (3.701 in)
• Rod diameter: 6 mm (0.236 in)
• Tube diameter: 15 mm (0.591 in)
• Plastic socket rod and tube connections
• No hardware kit included

Detailed Description

The Stabilus 6B-4731PZ convertible top cover strut is an OE-style gas strut designed for BMW convertible roof cover operation. Its compact 94 mm compressed length and 115.5 mm extended length help maintain proper movement and support in the roof cover mechanism, while the 200 N force rating provides the resistance needed for controlled opening and closing. This part number 6B-4731PZ is listed for select BMW 328i, 335i, 335is, 428i, 435i, 430i, 440i, and M4 models, making it a targeted replacement for BMW convertible top cover service.

This part cross-references Tuff Support 614491 for the same application.

What It Helps Address

• Weak or failing convertible top cover support
• Slow or uneven roof cover movement
• Cover that no longer stays open properly
• Loss of controlled lift at the convertible top cover
• Noise or binding caused by worn strut performance

Installation Notes and Tips

Verify the rod and tube socket style, compressed length, extended length, and force rating before installation. This Stabilus 6B-4731PZ uses plastic socket connections on both ends and does not include a hardware kit. Compare the original strut to the replacement part before removal, and confirm the BMW convertible top cover application matches the listed fitment for your vehicle.

• Fits 2017-2020 BMW 430i, N/A
• Fits 2017-2020 BMW 430i xDrive, N/A
• Fits 2017-2020 BMW 440i, N/A
• Fits 2017-2020 BMW 440i xDrive, N/A
• Fits 2015-2020 BMW M4, N/A
• Fits 2014-2016 BMW 428i, N/A
• Fits 2014-2016 BMW 428i xDrive, N/A
• Fits 2014-2016 BMW 435i, N/A
• Fits 2015-2016 BMW 435i xDrive, N/A
• Fits 2013 BMW 328i, N/A
• Fits 2013 BMW 328i xDrive, N/A
• Fits 2013 BMW 335i, N/A
• Fits 2013 BMW 335is, N/A

Quality Assurance

Stabilus is a recognized OE supplier for gas spring and strut applications, and this convertible top cover strut is built to match the specified dimensions and force rating for the listed BMW fitments. Confirm part number 6B-4731PZ against your original component and vehicle application before ordering.