ACI 380046 Window Regulator - Rear Left

Rear Left Power Window Regulator for Audi

Restore smooth rear window movement with this ACI Window Regulator, part number 380046. It is a new power window regulator with a plastic gear, built for the rear left door and made to meet or exceed OEM requirements.

Compatible with Audi A6, Audi A6 Quattro, and Audi S6 rear left power window applications, this ACI Window Regulator 380046 is a direct-fit replacement for vehicles built from the specified chassis/VIN break.

Key Features

• Power window regulator for the rear left door
• Plastic gear construction
• Motor not included
• New replacement part
• Meets or exceeds OEM specifications
• Brand line: ACI Window Regulator

Detailed Description

ACI 380046 is a rear left power window regulator engineered for Audi door service where the original regulator has worn, bound, or failed. The unit is designed for vehicles with power window operation and uses a plastic gear layout to support consistent glass movement in the rear left position. As a new replacement part, it provides an OE-style solution for Audi A6, Audi A6 Quattro, and Audi S6 models within the listed chassis range.

This part cross-references Genuine 4F0839461B for the same application. The ACI Window Regulator line focuses on direct replacement fitment for door glass control, and part number 380046 is listed as meeting or exceeding OEM standards.

What It Helps Fix

• Rear window stuck in the up or down position
• Slow, uneven, or noisy window travel
• Window slipping off track or binding in the door
• Failed regulator gear or cable mechanism
• Loss of rear left power window function

Installation Notes and Tips

Fits 2005-2011 Audi A6, rear left. Fits 2005-2011 Audi A6 Quattro, rear left. Fits 2007-2011 Audi S6, rear left. Verify the chassis/VIN break noted in the fitment data before ordering, since these applications apply from chassis/VIN 4F-6-050 916 or 4F 6 050 916 depending on model listing. Motor is not included, so reuse or replace the existing motor as needed during installation.

Quality Assurance

ACI 380046 is a new part built to meet or exceed OEM specifications for the listed Audi rear left power window applications. It is intended as a direct replacement for the original regulator in the specified fitment range.