Dorman 34223 A/C Compressor Bypass Pulley

Dorman 34223 A/C Compressor Bypass Pulley

Dorman 34223 is an A/C compressor bypass pulley for vehicles equipped with an FS10 compressor. It lets the original serpentine belt stay in place while routing around an inoperable A/C compressor, making it a practical repair option for Ford Escape, Mercury Mariner, Mazda Tribute, Mercury Cougar, Ford Contour, and Mercury Mystique applications.

Key Features

• Aluminum bracket with a plastic pulley for serviceable belt routing
• Outside diameter: 127 mm
• Designed for serpentine belt systems
• Includes mounting bracket and installation hardware package contents
• Installation instructions included
• For FS10 compressor applications

Product Details

This A/C compressor bypass pulley replaces the failed compressor’s belt path with a dedicated pulley assembly so the drive belt can continue operating the engine accessories. Dorman 34223 is built with an aluminum bracket and plastic pulley, and it is sized for serpentine belt routing. It is a direct-fit solution for select 1995-2007 Ford and Mercury vehicles, including 2001-2007 Ford Escape, 2005-2007 Mercury Mariner, and 2001-2006 Mazda Tribute. This part cross-references Four Seasons 3296NK for the same application.

What It Helps Solve

• Broken or seized A/C compressor that prevents normal belt routing
• Need to keep the original equipment drive belt in service
• Belt noise or routing issues caused by a failed compressor pulley path
• Temporary or permanent bypass of an inoperable FS10 compressor
• Restoration of accessory drive operation when the compressor is no longer usable

Installation Notes and Tips

Verify FS10 compressor application and belt routing before installation. Use the included instructions to confirm pulley alignment and serpentine belt tracking. Check belt condition, tensioner operation, and adjacent accessory pulleys during service to avoid repeat drive belt issues. Fits 2001-2007 Ford Escape, N/A; Fits 2005-2007 Mercury Mariner, N/A; Fits 2001-2006 Mazda Tribute, N/A; Fits 1999-2002 Mercury Cougar, N/A; Fits 1995-2000 Ford Contour, N/A; Fits 1995-2000 Mercury Mystique, N/A.

Quality Assurance

Manufactured by Dorman, this bypass pulley is built as a practical replacement solution for vehicles needing an alternate belt path around a failed A/C compressor. Part number 34223 is supported by Dorman’s application-specific cataloging for the listed Ford, Mercury, and Mazda fitments.