Stabilus 4B-257921 Back Glass Lift Support

Overview of Stabilus Back Glass Lift Support

The Stabilus 4B-257921 Back Glass Lift Support is engineered for reliable performance on Ford Expedition and Lincoln Navigator models. Designed to provide consistent lift force and smooth operation, this lift support ensures secure and controlled opening of the rear back glass.

• Compatible with Ford Expedition and Lincoln Navigator rear back glass
• Compressed length: 13.150 inches (334 mm)
• Extended length: 19.685 inches (500 mm)
• Rod diameter: 8 mm (0.315 inches)
• Tube diameter: 18 mm
• Lift force: 125 Newtons (28 lbs)
• Rod connection and shaft connection use durable plastic sockets
• Part number: 4B-257921

Technical Specifications and Features

This Stabilus back glass lift support features a compressed length of 13.150 inches and extends up to 19.685 inches, providing the necessary range for smooth rear window operation. The rod diameter measures 8 mm, while the tube diameter is 18 mm, ensuring structural integrity and durability. The lift force of 125 Newtons (28 lbs) is calibrated to support the weight of the back glass on Ford Expedition and Lincoln Navigator vehicles without strain.

Both the rod and shaft connections utilize plastic sockets, which offer secure attachment points and reduce wear over time. This part is designed specifically for body applications and is not intended for engine or heavy truck use. The Stabilus 4B-257921 is a direct replacement part, ensuring proper fit and function.

Applications and Problem Resolution

• Replaces worn or failing back glass lift supports on Ford Expedition and Lincoln Navigator
• Eliminates issues with rear window sagging or difficulty staying open
• Restores smooth and controlled lift and hold functionality of the back glass
• Prevents sudden closing or unsafe operation of the rear window
• Addresses rattling or noise caused by weakened lift supports

Installation Notes and Tips

Installation of the Stabilus 4B-257921 back glass lift support requires basic hand tools and moderate mechanical skill. Ensure the vehicle is parked on a level surface and the rear window is supported during removal of the old lift support. Carefully detach the plastic socket connections at both ends before removing the old unit. Align the new lift support and snap the plastic sockets securely into place. Verify smooth operation of the back glass before completing installation.

Quality Assurance and Warranty

Stabilus is a recognized manufacturer of automotive lift supports, known for consistent quality and durability. The 4B-257921 back glass lift support is manufactured to meet OEM specifications for Ford Expedition and Lincoln Navigator models. While specific warranty details may vary, Stabilus products typically include a limited warranty against defects in materials and workmanship. Refer to the product documentation or manufacturer for exact warranty terms.