StrongArm 4539 Trunk Lid Lift Support

StrongArm Trunk Lid Lift Support for BMW 525i, 528i, 530i, 540i, M5

The StrongArm 4539 trunk lid lift support is engineered specifically for select BMW models, including the 525i, 528i, 530i, 540i, and M5. Designed to provide reliable and consistent lift assistance, this part ensures smooth trunk operation and secure positioning.

• Compressed length: 9.34 inches
• Extended length: 13.09 inches
• Cylinder outside diameter: 19.0 mm
• Stroke length: 3.75 inches
• Inner shaft diameter: 10.0 mm
• Outer cylinder material: durable steel with black finish
• End 1: 10mm nylon ball socket
• End 2: 8mm threaded connection
• Maximum force: 121 Newtons
• Materials include rubber and Teflon components for smooth operation

This trunk lid lift support (part number 4539) is a specific fit for BMW models 525i, 528i, 530i, 540i, and M5, ensuring compatibility and proper function. The steel outer cylinder with a black finish provides strength and corrosion resistance, while the nylon ball socket and threaded end fittings allow for secure attachment points. The 3.75-inch stroke length and 121 Newton maximum force deliver consistent lift assistance to ease trunk lid opening and holding.

Purpose and Common Applications

• Replaces worn or weak trunk lid lift supports on BMW 525i, 528i, 530i, 540i, and M5
• Prevents trunk lid from slamming shut or failing to stay open
• Restores smooth and controlled trunk lid operation
• Eliminates rattling or loose trunk lid movement
• Supports safe and convenient access to trunk compartment

Installation Notes and Tips

Installation of the StrongArm 4539 trunk lid lift support requires removal of the old lift support and attachment of the new unit using the ball socket and threaded end fittings. Ensure the correct orientation and secure fastening at both ends. It is recommended to use appropriate tools to avoid damage to mounting points. Verify the trunk lid opens and holds properly after installation.

Quality Assurance and Warranty

Manufactured with steel, rubber, and Teflon materials, this trunk lid lift support is built for durability and consistent performance. The part is designed specifically for BMW 525i, 528i, 530i, 540i, and M5 models to meet OEM specifications. Warranty information is available upon request from the manufacturer StrongArm.