StrongArm 6578 Trunk Lid Lift Support

StrongArm 6578 Trunk Lid Lift Support

Restore smooth, controlled trunk lid operation with this StrongArm trunk lid lift support. Built as a specific-fit replacement for select BMW applications, it uses pressurized cylinder construction to help hold the trunk lid open with consistent support.

Fits 1999 BMW M3, N/A. Fits 2001-2002 BMW M3, N/A. Fits 1999-2002 BMW Z3, N/A. This part number is StrongArm 6578, and it is also referenced as AMS Automotive 6578 for the same application.

Key Features

• Specific-fit trunk lid lift support for confirmed BMW applications
• Extended length: 21.65 in.; compressed length: 13.15 in.
• Stroke length: 8.5 in. for controlled opening and closing travel
• Maximum force rating: 67.0
• Steel outer cylinder with black finish
• Nylon 10 mm ball socket ends on both sides
• Rubber and Teflon materials used in the support construction

Detailed Description

StrongArm 6578 is a trunk lid lift support engineered for select BMW M3 and BMW Z3 models. As a pressurized cylinder, it helps maintain trunk lid position and provides smoother motion during opening and closing. The specific-fit design supports accurate replacement on 1999 BMW M3, 2001-2002 BMW M3, and 1999-2002 BMW Z3 applications.

Built with a steel outer cylinder, nylon ball socket ends, and internal materials that include rubber and Teflon, this lift support is made for consistent operation in trunk lid service. The 67.0 force rating, 8.5-inch stroke, and 21.65-inch extended length are important specifications for matching the original support geometry on the vehicle. StrongArm 6578 is a direct-fit trunk lid lift support for BMW M3 and BMW Z3 owners replacing a worn or weak rear lid support.

Common Problems This Part Can Solve

• Trunk lid that drops instead of staying open
• Weak or slow trunk lid lift action
• Uneven or inconsistent rear lid support
• Difficulty opening the trunk lid smoothly
• Loss of controlled hold when accessing the cargo area

Installation Notes and Tips

Verify the vehicle application before installation and match the original support length, stroke, and end style to the existing part. Inspect the mounting points and ball studs for wear before installing the new support. For reliable trunk lid operation, replace the support on the vehicle as needed to maintain balanced opening and closing performance.

Quality Assurance

StrongArm lift supports are custom engineered and manufactured to exceed industry standards for smoother operation and longer service life. This part number, 6578, is built to the same application requirements used for the listed BMW fitments and cross-references AMS Automotive 6578.