ACI 81521 Window Regulator - Front Right

Reliable Power Window Regulator for BMW Front Right Door

The ACI Window Regulator part number 81521 is designed specifically for the front right door of select BMW models including the 525i, 528i, 530i, 540i, and M5. This new power window regulator meets or exceeds OEM standards, ensuring dependable window operation without the motor or mounting hardware included.

• Compatible with BMW 525i, 528i, 530i, 540i, and M5 front right door
• Power window regulator type for smooth window movement
• New part that meets or exceeds OEM quality
• Mounting hardware and motor not included
• Part number 81521 for precise identification

About the ACI Window Regulator Product Line

The ACI Window Regulator line focuses on delivering replacement window regulators engineered to match OEM specifications. This product line provides reliable window operation for power windows, designed to fit specific mounting positions such as the front right door. The 81521 model is part of this line, offering a direct replacement solution for BMW vehicles requiring a power window regulator without the motor or mounting hardware.

Detailed Product Description

This ACI Window Regulator 81521 is a power window regulator intended for the front right door of BMW 525i, 528i, 530i, 540i, and M5 models. It is a new component that meets or exceeds OEM standards, ensuring consistent and smooth window operation. Please note that this part does not include the motor or mounting hardware, so those components must be sourced separately if needed. The regulator is designed to integrate seamlessly with the vehicle’s existing power window system, providing reliable functionality and durability.

Common Issues This Window Regulator Addresses

• Window stuck in the up or down position
• Intermittent or slow window movement
• Grinding or unusual noises when operating the window
• Window falling inside the door panel
• Failure of the window to respond to power controls

Installation Notes and Tips

• Compatible with front right door mounting position only
• Mounting hardware and motor are not included; verify availability before installation
• Ensure proper alignment during installation to avoid window binding
• Disconnect the vehicle battery before beginning installation to prevent electrical issues
• Consult vehicle-specific repair manuals for detailed installation procedures

Quality Assurance and Warranty

The ACI Window Regulator 81521 is a new part that meets or exceeds OEM quality standards, providing reliable performance for BMW power windows. While mounting hardware and motor are not included, the regulator itself is manufactured to strict quality controls. Warranty coverage details should be confirmed with the parts provider or manufacturer.