StrongArm 6840 Trunk Lid Lift Support

StrongArm Trunk Lid Lift Support for BMW 328i, 335i, 335is, M3

The StrongArm 6840 trunk lid lift support is engineered specifically for select BMW models including the 328i, 335i, 335is, and M3. Designed to provide reliable and consistent support, this lift support ensures smooth trunk operation and secure positioning.

• Compressed length: 13.65 inches
• Extended length: 21.90 inches
• Cylinder outside diameter: 18.0 mm
• Stroke length: 8.25 inches
• Inner shaft diameter: 8.0 mm
• Outer cylinder material: durable black steel
• End fittings: 10mm ball sockets (nylon-steel) on both ends
• Maximum force rating: 249 Newtons
• Materials include rubber and Teflon components for smooth operation
• Specific fitment for BMW 328i, 335i, 335is, and M3 models

This trunk lid lift support (part number 6840) is constructed with a steel outer cylinder finished in black for corrosion resistance and durability. The 10mm nylon-steel ball socket ends provide secure attachment points that reduce wear and noise during trunk operation. With a stroke length of 8.25 inches and a maximum force of 249 Newtons, this lift support offers consistent lift and hold capabilities tailored to the weight and design of the BMW trunk lid. The inclusion of rubber and Teflon materials helps minimize friction and extends the service life of the component.

Purpose and Common Applications

• Replaces worn or weak trunk lid lift supports on BMW 328i, 335i, 335is, and M3
• Restores smooth and controlled trunk lid opening and closing
• Prevents trunk lid from slamming or falling unexpectedly
• Eliminates rattling or noise caused by failing lift supports
• Improves safety and convenience when accessing the trunk compartment

Installation Notes and Tips

Installation of the StrongArm 6840 trunk lid lift support requires removal of the old lift support by detaching the 10mm ball socket ends. It is recommended to support the trunk lid securely during replacement to avoid injury or damage. The specific fitment ensures direct replacement without modification for BMW 328i, 335i, 335is, and M3 models. Lubricating the ball socket joints with a suitable grease can help maintain smooth operation over time.

Quality Assurance and Warranty

StrongArm trunk lid lift supports are manufactured to meet OEM specifications for fit, form, and function. The steel construction and quality materials provide durability under normal operating conditions. While no internal rebound spring is included, the design ensures reliable performance within the specified force rating. Please refer to StrongArm’s warranty policy for coverage details related to manufacturing defects.