ACI 389638 Power Window Motor and Regulator Assembly - Rear Left

Reliable Window Motor and Regulator Assembly for BMW Models

The ACI Window Assembly part number 389638 is a new power window motor and regulator designed specifically for select BMW vehicles. Engineered with a hardened steel gear, this assembly ensures durable and consistent window operation for models including the 323i, 328i, 330i, and M3.

• New power window motor and regulator assembly
• Hardened steel gear for enhanced durability
• Compatible with multiple BMW models including 323i, 325i, 328i, 330i, 335i, and M3
• Part number 389638 for precise fitment
• Express up or down feature not included

About the ACI Window Assembly Product Line

The ACI Window Assembly line focuses on delivering complete window motor and regulator solutions that meet OEM specifications. This product line combines motor and regulator components into a single assembly, simplifying installation and ensuring reliable window function. The 389638 assembly is part of this line, providing a direct replacement for power window systems in various BMW models.

Product Details and Specifications

This window motor and regulator assembly features a hardened steel gear, which contributes to long-lasting performance and resistance to wear. The assembly is designed as a power type, providing smooth and consistent window movement without the express up or down function. It is a new component, not remanufactured, ensuring fresh parts and materials for optimal reliability.

Common Applications and Problem Resolution

• Replaces faulty or non-functioning window motors in BMW 323i, 328i, 330i, and M3 models
• Solves issues with slow or stuck power windows
• Addresses window regulator failures causing uneven or jerky window movement
• Eliminates grinding noises from worn gears
• Restores proper window operation after electrical or mechanical failure

Installation Notes and Tips

Installation of the ACI 389638 window motor and regulator assembly requires removal of the door panel and disconnection of the existing window motor. Ensure the vehicle battery is disconnected before starting to avoid electrical hazards. Align the regulator properly to prevent window misalignment. This assembly is designed for direct bolt-on replacement in compatible BMW models, but professional installation is recommended for best results.

Quality Assurance and Warranty

ACI manufactures this window motor and regulator assembly to meet or exceed OEM standards. The use of hardened steel gears enhances durability and longevity. This new part comes with a manufacturer-backed warranty to protect against defects in materials and workmanship, providing confidence in its performance and reliability.