Stabilus 4B-440017 Deck Lid Lift Support

Overview of Stabilus Gas Spring for BMW Models

The Stabilus gas spring part number 4B-440017 is engineered for precise fitment with select BMW vehicles, including the 420i, 428i, 430i, 435i, 440i, and M4 models. Designed to provide reliable support and smooth operation, this gas spring meets specific dimensional and force requirements for optimal performance.

• Compressed length: 241.5 mm (9.508 inches)
• Extended length: 403.5 mm (15.886 inches)
• Rod diameter: 8 mm (0.315 inches)
• Tube diameter: 18 mm
• Force: 120 Newtons (27 lbs)
• Rod end attachment diameter: 10 mm (0.394 inches)
• Rod and shaft connection: Plastic socket
• Compatible with BMW 420i, 428i, 430i, 435i, 440i, and M4 models

Technical Details and Specifications

This Stabilus gas spring (4B-440017) features a compressed length of 241.5 mm and extends to 403.5 mm, providing the necessary range of motion for applications such as hood or trunk support. The 8 mm rod diameter and 18 mm tube diameter ensure durability while maintaining smooth operation. The force rating of 120 Newtons (27 lbs) is calibrated to offer consistent lift and hold capabilities without excessive strain on mounting points. The plastic socket rod end connection facilitates secure attachment and reduces wear over time.

Compatible BMW Models and Applications

This gas spring is specifically compatible with the following BMW models: 420i, 428i, 428i xDrive, 430i, 430i xDrive, 435i, 435i xDrive, 440i, 440i xDrive, and M4. It is designed for use in OEM replacement scenarios where precise fit and function are critical. The part number 4B-440017 ensures correct identification for these applications.

• Supports hood, trunk, or tailgate lift and hold functions
• Replaces worn or failing gas springs causing difficulty in opening or closing
• Addresses uneven or inconsistent lift force
• Eliminates rattling or loose mounting issues
• Restores smooth and controlled motion to vehicle components

Installation Notes and Tips

Installation of the Stabilus 4B-440017 gas spring requires proper alignment of the rod and tube ends to the vehicle’s mounting points. Ensure the plastic socket connections are securely engaged to prevent detachment during operation. It is recommended to replace gas springs in pairs to maintain balanced force and consistent performance. Use appropriate tools to avoid damage to the rod or tube during installation.

Quality Assurance and Warranty

Stabilus gas springs are manufactured to meet stringent quality standards for durability and performance. While specific warranty details for part number 4B-440017 should be confirmed with the supplier, Stabilus products typically come with a limited warranty covering defects in materials and workmanship. This ensures reliability and peace of mind when replacing critical vehicle components.