Dorman 751-857 Power Window Motor and Regulator Assembly - Rear Left

Reliable Window Motor and Regulator Assembly for Mazda CX-9

The Dorman 751-857 window motor and regulator assembly is designed specifically for Mazda CX-9 models, providing a durable and precise solution for power window operation. Engineered with metal gears and a bolt attachment type, this assembly ensures consistent performance without the need for additional mounting hardware.

• Durable metal gear construction for long-lasting operation
• Bolt attachment type for secure and stable installation
• Includes regulator for complete window movement control
• Two terminal connections for reliable electrical performance
• Non-express up or down motor design for standard window operation

Product Details and Specifications

This Dorman window motor and regulator assembly (part number 751-857) is tailored for the Mazda CX-9, offering a direct replacement for the factory unit. The metal gear material enhances durability under regular use, while the bolt attachment type simplifies mounting without requiring additional hardware, which is not included. The assembly comes without a wiring harness or installation instructions, so professional installation or prior experience is recommended. It does not feature anti-pinch motor technology or embedded micro-controlled logic, making it a straightforward, reliable component for standard power window systems.

Common Applications and Problem Resolution

• Restores power window functionality in Mazda CX-9 vehicles
• Replaces worn or damaged window motors causing slow or non-responsive windows
• Fixes window regulator failures that prevent smooth window movement
• Addresses electrical connection issues with two terminal design
• Eliminates rattling or grinding noises from faulty gear mechanisms

Installation Notes and Tips

Installation of the Dorman 751-857 window motor and regulator assembly requires removal of the door panel and disconnection of the existing motor and regulator. Since mounting hardware and wiring harness are not included, retain original components or source compatible parts. The bolt attachment type requires appropriate tools for secure fastening. Due to the absence of installation instructions, consulting a professional or referring to a Mazda CX-9 service manual is advised to ensure proper fitment and operation.

Quality Assurance and Warranty

Dorman manufactures this window motor and regulator assembly to meet or exceed OEM standards for fit, form, and function. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship. This part is engineered to provide reliable service for Mazda CX-9 owners seeking a dependable replacement for their vehicle’s power window system.