Dorman 749-639 Window Regulator - Rear Left

Reliable Window Regulator for Audi A4, S4, RS4 Models

The Dorman 749-639 window regulator is designed for electric window operation in select Audi vehicles. Engineered with durable materials, this part ensures smooth window movement and reliable performance for your Audi A4, A4 Quattro, RS4, and S4 models.

Key Features of Dorman 749-639 Window Regulator

• Gear material constructed from plastic for consistent operation
• Bolt-on attachment type for secure mounting
• Frame made from a combination of metal and plastic for strength and flexibility
• Electric window operation compatible with factory systems
• Includes one power regulator unit per package
• No motor or mounting hardware included
• Installation instructions not included

Detailed Description of the Dorman Window Regulator

This window regulator (part number 749-639) is specifically designed for electric window systems in Audi A4, A4 Quattro, RS4, and S4 vehicles. The regulator features a plastic gear that meshes smoothly with the window mechanism, while the frame combines metal and plastic components to balance durability and weight. The bolt-on attachment type allows for a secure fit using existing mounting points. Note that this unit does not include a motor or mounting hardware, so it is intended for replacement of the regulator assembly only.

Common Issues Addressed by This Window Regulator

• Window glass failing to move up or down smoothly
• Intermittent or complete window operation failure
• Grinding or clicking noises during window movement
• Loose or misaligned window glass
• Wear or damage to the existing window regulator assembly

Installation Notes and Tips

• Compatible with electric window systems on Audi A4, A4 Quattro, RS4, and S4 models
• Requires removal of door panel for access to the regulator assembly
• Use appropriate tools for bolt-on attachment to ensure secure fitment
• Verify window alignment after installation to prevent binding
• Motor and mounting hardware must be reused or sourced separately

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. While this window regulator does not include a motor or mounting hardware, it is built with quality materials to provide reliable service. Warranty coverage details should be confirmed at the time of purchase.