Dorman 34852 A/C Compressor Bypass Pulley

Dorman 34852 A/C Compressor Bypass Pulley

Dorman 34852 is an A/C compressor bypass pulley for vehicles with an inoperable 10PS compressor. It lets the original serpentine belt stay in service while routing around the failed compressor, making it a practical repair for select Toyota and Lexus applications.

Compatible with 2000-2004 Toyota Avalon, 1999-2003 Lexus ES300, 1992-1993 Lexus ES300, 1999-2003 Lexus RX300, 2002-2006 Toyota Camry, 2001-2007 Toyota Highlander, 2004-2008 Toyota Solara, 2004-2006 Lexus ES330, and 2004-2006 Lexus RX330.

Key Features

• Direct bypass solution for an inoperable A/C compressor
• Uses the original equipment serpentine drive belt
• Aluminum bracket with plastic pulley construction
• 5.3 in. outside diameter pulley
• Mounting bracket included for installation
• Configured for 10PS compressor applications
• Designed for select Toyota and Lexus vehicles

Detailed Description

This Dorman A/C compressor bypass pulley provides a straightforward way to keep the accessory drive system operating when the compressor has failed. Instead of replacing the full A/C compressor assembly, the pulley assembly routes the serpentine belt around the inoperative unit so the belt path remains functional. Part number 34852 is built with an aluminum bracket and a plastic pulley for the specified 10PS compressor applications.

This part cross-references Four Seasons 77390 for the same application. It is a fitment-based solution for Toyota Camry, Toyota Highlander, Toyota Solara, Lexus ES300, Lexus ES330, Lexus RX300, and Lexus RX330 vehicles listed above.

What It Helps Address

• Broken or seized A/C compressor that prevents normal belt routing
• Loss of serpentine belt function caused by compressor failure
• Need to keep the vehicle drivable without replacing the compressor immediately
• Noise or drag from an inoperative compressor pulley assembly
• Temporary or permanent bypass of the failed compressor in the accessory drive system

Installation Notes and Tips

Verify compressor type 10PS and confirm belt routing before installation. This assembly includes the bracket and pulley, but mounting hardware and installation instructions are not included. Inspect the serpentine belt, tensioner, and adjacent pulleys for wear before reassembly to avoid repeat drive-system issues.

Quality Assurance

Dorman manufactures this bypass pulley as a cost-effective replacement solution for specific OE applications. Part number 34852 is built to match the listed vehicle fitment and compressor configuration for a proper service repair.