StrongArm 6840 Trunk Lid Lift Support

StrongArm 6840 Trunk Lid Lift Support

StrongArm 6840 is a specific-fit trunk lid lift support engineered for BMW applications that need consistent rear lid support and controlled opening action. It uses a pressurized cylinder design with a black steel outer cylinder and nylon-steel ball socket ends for secure attachment and smooth operation.

Key Features

• Specific-fit trunk lid lift support for confirmed BMW applications
• Extended length: 21.90 in.; compressed length: 13.65 in.; stroke length: 8.25 in.
• Maximum force rating: 249.00
• Black steel outer cylinder for durable construction
• Ball socket ends on both sides: 10 mm nylon-steel
• Rubber and Teflon materials for smoother movement and wear resistance
• No internal rebound spring

Detailed Description

This StrongArm trunk lid lift support, part number 6840, is built for direct replacement use on select BMW models. It is compatible with 2007-2013 BMW 328i, 2010-2013 BMW 335i, 2012-2013 BMW 335is, and 2008-2013 BMW M3 trunk lid applications. The pressurized cylinder helps maintain steady rear lid support while opening and closing, and the specific-fit design supports proper alignment with the factory mounting points. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Solve

• Trunk lid that will not stay open
• Weak or slow rear lid lift action
• Uneven or inconsistent trunk support
• Loss of controlled opening and closing movement
• Wear-related replacement needs on BMW trunk lid support hardware

Installation Notes and Tips

Verify the vehicle application before installation and confirm the ball socket end style matches the original support. For proper operation and balanced support, replace lift supports in pairs when servicing the trunk lid system. After installation, cycle the trunk lid several times to confirm smooth movement and secure engagement at both mounting points.

Quality Assurance

StrongArm lift supports are custom engineered and manufactured beyond industry standards to deliver smoother operation and longer-lasting performance. Part number 6840 is built for the specified BMW fitments and follows the brand’s focus on consistent pressurized support for automotive lift applications.