HomeACI 81272 Window Regulator - Rear Left
Part #: HP4540

ACI 81272 Window Regulator - Rear Left

Window Regulator
5 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Window Regulator
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Reliable Rear Left Power Window Regulator for Cadillac CTS

The ACI 81272 power window regulator is designed specifically for the rear left door of Cadillac CTS models. This new window regulator meets or exceeds OEM standards, ensuring dependable window operation without the motor or mounting hardware included.

  • Compatible with Cadillac CTS rear left door
  • Power window operation type for smooth control
  • New, not remanufactured part for consistent performance
  • Meets or exceeds original equipment manufacturer (OEM) specifications
  • Mounting hardware and motor not included

About the ACI Window Regulator Product Line

The ACI Window Regulator line focuses on delivering precise fit and reliable window movement for various vehicle applications. This product line includes power window regulators engineered to match OEM quality, providing a direct replacement solution for Cadillac CTS owners requiring rear left door window components.

Product Details and Specifications

The ACI 81272 is a power window regulator designed for the rear left mounting position on Cadillac CTS vehicles. It is a new part that does not include the motor or mounting hardware, allowing for flexibility if you already have compatible components or prefer to source them separately. This window regulator is engineered to meet or exceed OEM standards, ensuring proper fit and function within the vehicle’s door assembly.

Common Issues Addressed by This Window Regulator

  • Window glass failing to move up or down smoothly
  • Intermittent or complete loss of power window operation in rear left door
  • Grinding or unusual noises when operating the window
  • Window glass becoming stuck or misaligned
  • Wear or damage to the original window regulator mechanism

Installation Notes and Tips

  • Verify the mounting position as rear left before installation
  • Motor and mounting hardware are not included; ensure you have compatible parts
  • Follow vehicle-specific service manual instructions for door panel removal and regulator replacement
  • Test window operation before reassembling the door panel
  • Handle glass carefully to avoid damage during installation

Quality Assurance and Warranty

The ACI 81272 window regulator is a new replacement part that meets or exceeds OEM quality standards for Cadillac CTS vehicles. While mounting hardware and motor are not included, the regulator itself is manufactured to provide reliable performance and durability. Please consult the product packaging or manufacturer for specific warranty details.

BrandHandy Pack
Part NumberHP4540
PositionWindow Regulator
Connector GenderMale
ContentsPigtail Assembly
Terminal GenderFemale
Terminal TypeBlade

This part fits 5 vehicles. Search below:

YearMakeModelPositionNotes
2007CadillacCTSRear LeftWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2006CadillacCTSRear LeftWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2005CadillacCTSRear LeftWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2004CadillacCTSRear LeftWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2003CadillacCTSRear LeftWindow regulator suitable for vehicle's proper fit and function.; Window Regulator

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.