ACI 384508 Window Regulator - Rear Left

Reliable Rear Left Power Window Regulator for Audi A4 and S4

The ACI Window Regulator 384508 is designed specifically for the rear left door of Audi A4, A4 Quattro, and S4 models. This new power window regulator meets or exceeds OEM standards, ensuring consistent window operation without the motor or mounting hardware included.

• Compatible with Audi A4, A4 Quattro, and S4 rear left doors
• Power window operation type for smooth control
• New part, not remanufactured
• Meets or exceeds OEM quality standards
• Mounting hardware and motor not included

About the ACI Window Regulator Product Line

The ACI Window Regulator line focuses on delivering reliable window control components tailored to specific vehicle applications. This product line emphasizes OEM-level fit and function, providing replacement window regulators that maintain factory performance for power window systems. The 384508 part number is part of this line, designed to restore proper window movement on compatible Audi models.

Product Details and Specifications

This power window regulator is engineered for the rear left mounting position on Audi A4, A4 Quattro, and S4 vehicles. It is a new component that does not include the motor or mounting hardware, allowing for flexibility if you already have these parts or prefer to source them separately. The regulator is built to meet or exceed original equipment manufacturer standards, ensuring durability and reliable window operation over time.

Common Issues Addressed by This Window Regulator

• Window stuck in the up or down position
• Slow or uneven window movement
• Window falling inside the door panel
• Grinding or unusual noises during window operation
• Failure of the rear left power window to respond

Installation Notes and Tips

Installation requires removal of the rear left door panel and disconnection of the existing window regulator. Since mounting hardware and motor are not included, ensure these components are available or replaced as needed. Proper alignment of the regulator is critical for smooth window operation. It is recommended to test window function before reassembling the door panel.

Quality Assurance and Warranty

The ACI Window Regulator 384508 is a new part that meets or exceeds OEM specifications for fit and function. While mounting hardware and motor are not included, the regulator itself is manufactured to maintain factory standards. Please refer to ACI’s warranty policy for specific coverage details.