ACI 380248 Window Regulator - Rear Left

Rear Left Power Window Regulator for Infiniti

Restore smooth rear window movement with this ACI power window regulator, part number 380248. It is a new, OE-style replacement for the rear left door and meets or exceeds OEM requirements for fit and function.

Compatible with Infiniti G35, G25, G37, and Q40 rear left applications, this window regulator is built with a plastic gear and is supplied without a motor. ACI Window Regulator 380248 is a direct-fit solution for common rear window service needs on select Infiniti models.

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

Application Details

This ACI 380248 window regulator is made for rear left power window service on 2007-2008 Infiniti G35, 2011-2012 Infiniti G25, 2009-2013 Infiniti G37, and 2015 Infiniti Q40. It is a practical replacement when the original regulator no longer moves the glass correctly or has worn internal components. This part cross-references Nissan/Infiniti OE number 82721JK000 and aftermarket reference K380248 for the same application.

Common Problems It Can Help Solve

• Window glass that will not raise or lower properly
• Slow, uneven, or noisy rear window operation
• Broken regulator gear or internal drive wear
• Window movement that stops before full travel
• Rear left power window failure on Infiniti G35, G25, G37, or Q40

Installation Notes and Tips

Verify rear left door fitment before installation and confirm the existing motor condition, since the motor is not included. Transfer or reuse the correct motor only if it is in serviceable condition and matches the vehicle’s original setup. Inspect the window tracks, guides, and glass alignment during replacement to help ensure proper operation after installation.

Quality Assurance

ACI lists this regulator as a new part that meets or exceeds OEM requirements. The ACI Window Regulator line is built for direct replacement use on the specified Infiniti applications, including Infiniti G35, G25, G37, and Q40 rear left doors.