WAI 389016 Window Motor and Regulator Assembly - Rear Left

Window Motor and Regulator Assembly Overview

This WAI window motor and regulator assembly is built for rear left glass operation on select BMW models. It provides a direct replacement solution for restoring smooth window movement when the original unit is worn, slow, or no longer functioning.

Key Features

• Window motor and regulator assembly for rear left installation
• Direct replacement format for service on the glass lift system
• Fits select BMW 318ti, 318i, 328i, M3, 318is, 320i, and 325i/325is applications
• Supports consistent window travel and controlled glass movement
• WAI part number 389016 for catalog and fitment reference

Detailed Description

Use this assembly when the original rear left window regulator or motor has failed, binds during operation, or no longer raises and lowers the glass correctly. It is cataloged for BMW 318ti, 318i, 328i, M3, 318is, 320i, 325i, and 325is applications across the listed model years, making it a fitment-specific replacement for common power window service needs. The WAI 389016 part number helps confirm the correct application during ordering and installation planning.

Common Issues It Can Solve

• Window glass that will not move up or down
• Slow, uneven, or noisy window operation
• Failure caused by a worn motor or regulator mechanism
• Window movement that stops before reaching full travel

Installation Notes and Tips

Verify the rear left position and match the vehicle application before installation. Compare the original unit, connector style, and mounting points to confirm the correct replacement. For BMW 318i, 325i, and related models, checking the existing regulator assembly before removal helps reduce installation delays and ensures the new part matches the factory configuration.

Quality Assurance

WAI supplies automotive electrical components for replacement service applications. Part number 389016 is cataloged for the listed BMW fitments and is intended to restore proper window operation when the original assembly is no longer serviceable.