Dorman 740-879 Window Regulator - Rear Right

Reliable Window Regulator for Buick, Oldsmobile, and Pontiac

The Dorman 740-879 window regulator is designed for electric window operation in select Buick, Oldsmobile, and Pontiac models. This bolt-on replacement part offers a durable metal and plastic frame construction to ensure consistent performance without the motor included.

Key Features of Dorman 740-879 Window Regulator

• Gear material constructed from durable plastic for smooth operation
• Bolt-on attachment type for straightforward installation
• Frame made from a combination of metal and plastic for strength and flexibility
• Electric window operation compatible with factory power window systems
• Includes one power regulator without motor or mounting hardware

Detailed Product Description

The Dorman 740-879 window regulator is engineered to replace the electric window regulator assembly in Buick Achieva, Oldsmobile Cutlass, and Pontiac Grand Am and Skylark models. Its plastic gear material reduces noise and wear, while the metal and plastic frame provides a balance of rigidity and corrosion resistance. This part is designed for bolt-on installation, making it a practical choice for professional repairs or experienced DIYers. Note that the motor and mounting hardware are not included, so these components must be reused or purchased separately.

Common Applications and Issues Resolved

• Restores smooth electric window operation in Buick Achieva, Oldsmobile Cutlass, and Pontiac Grand Am and Skylark
• Replaces worn or broken plastic gears causing window jamming or slipping
• Fixes window regulators with damaged or bent frames affecting window alignment
• Addresses issues where the window fails to move up or down properly
• Provides a reliable replacement for regulators without motor failure

Installation Notes and Tips

• Designed for bolt-on installation; ensure all bolts are securely fastened
• Motor and mounting hardware are not included; retain original components or source separately
• Installation instructions are not included; refer to vehicle service manual for detailed guidance
• Disconnect the vehicle battery before installation to prevent electrical hazards
• Test window operation after installation before reassembling door panels

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The 740-879 window regulator undergoes quality checks to ensure durability and reliable performance. Warranty coverage details should be confirmed at the time of purchase, as they may vary by distributor or retailer.