FCS 86431 Deck Lid Lift Support - Rear

FCS 86431 Suspension Gas Strut Overview

FCS 86431 is a gas strut with a compressed length of 9.41 inches, an extended length of 15.87 inches, and a 6.46-inch stroke. It is built for direct-fit applications on select Audi models, including Audi A8, Audi A8 Quattro, and Audi S8 rear applications.

Key Features

• Part number: 86431
• Compressed length: 9.41 in.
• Extended length: 15.87 in.
• Stroke length: 6.46 in.
• Fits 1997-2003 Audi A8 Quattro, N/A
• Fits 1997-1999 Audi A8, N/A
• Fits 2001-2003 Audi S8, Rear

Detailed Fitment and Application

This FCS gas strut is specified for 1997-2003 Audi A8 Quattro, 1997-1999 Audi A8, and 2001-2003 Audi S8 rear applications. The length specifications are important for matching the original support geometry, travel range, and installed position on the vehicle. If you are searching for an Audi A8 Quattro rear strut replacement or an Audi S8 rear gas strut by part number 86431, this listing matches the confirmed vehicle coverage.

FCS is the brand line identified for this part, and 86431 is the reference to use when verifying application details against your existing component.

Common Issues This Part Addresses

• Weak or inconsistent lift support action
• Reduced holding force in the supported panel or assembly
• Incorrect extended or compressed length during replacement
• Fitment mismatch on Audi A8, Audi A8 Quattro, or Audi S8 rear applications

Installation Notes and Tips

Confirm the installed position and compare the compressed length, extended length, and stroke length before installation. Match the replacement to the vehicle position listed for your application, especially on rear-mounted Audi S8 setups. Verify the existing part number and mounting orientation before removal to avoid fitment errors.

Quality Assurance

Use the published dimensions and confirmed vehicle fitment to validate the replacement before installation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.