HomeACI 81255 Window Regulator - Rear Right
Part #: E-251K

ACI 81255 Window Regulator - Rear Right

Window Regulator
22 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 Right Power Window Regulator for Buick and Oldsmobile

The ACI 81255 power window regulator is designed specifically for the rear right door of select Buick and Oldsmobile models. This new window regulator meets or exceeds OEM standards, ensuring dependable window operation for your vehicle.

  • Compatible with Buick Century, Oldsmobile Intrigue, and Oldsmobile Regal
  • Rear right mounting position
  • Power window operation type
  • New part, not remanufactured
  • Mounting hardware and motor not included
  • Meets or exceeds OEM quality standards

About the ACI Window Regulator Product Line

The ACI Window Regulator line offers a range of replacement window regulators engineered to provide reliable window movement and durability. This product line focuses on delivering components that meet or exceed original equipment manufacturer specifications, ensuring proper fit and function for various vehicle makes and models, including Buick and Oldsmobile.

Product Details and Specifications

The ACI 81255 is a power window regulator designed for the rear right door of Buick Century, Oldsmobile Intrigue, and Oldsmobile Regal vehicles. This part is sold without the motor and mounting hardware, allowing for flexibility if you already have compatible components or prefer to source them separately. Being a new part, it offers a fresh replacement option that aligns with OEM quality standards to maintain the integrity of your vehicle’s window system.

Common Issues Addressed by This Window Regulator

  • Window glass failing to move up or down smoothly
  • Intermittent or no response from the power window switch
  • Window stuck in one position due to regulator failure
  • Excessive noise or grinding when operating the window
  • Loose or misaligned window glass in the rear right door

Installation Notes and Tips

  • Ensure compatibility with your vehicle’s make, model, and year before installation
  • Motor and mounting hardware are not included; verify you have these components or purchase separately
  • Handle the window glass carefully during removal and installation to avoid damage
  • Follow manufacturer instructions for proper alignment and secure mounting
  • Test window operation before reassembling the door panel

Quality Assurance and Warranty Information

The ACI 81255 window regulator is manufactured to meet or exceed OEM standards, providing reliable performance and durability. As a new part, it undergoes quality checks to ensure proper fit and function. Please refer to the product packaging or manufacturer documentation for specific warranty details.

BrandSealed Power
Part NumberE-251K
PositionWindow Regulator
2nd Ring Face DesignReverse Torsional
2nd Ring MaterialGrey Iron w/Phosphate Coating
2nd Ring Width5/64
2nd Ring Width (in)5/64
Bore Diameter4.0000
Bore Diameter101.60
Bore Size (in)4.0000
Bore Size (mm)101.60
Cylinder Quantity8
Oil Ring Width3/16
Oil Ring Width (in)3/16
Outside Diameter4.0000
Outside Diameter (In)4.0000
Radial Wall Thickness - Top (in)0.145
Ring Set Groove Widths (in)5/64 x 5/64 x 3/16
Short Circuit Protection3 Piece Flex Vent
Standard SizeStandard Size
Top Ring Face DesignBarrel Face
Top Ring MaterialSteel w/Moly
Top Ring Radial Wall Thickness0.145
Top Ring Width5/64
Top Ring Width (in)5/64

This part fits 22 vehicles. Search below:

YearMakeModelBody TypeLitersCylindersPositionNotes
2005BuickCenturySedan3.1LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2004BuickCenturySedan3.1LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2004BuickRegalSedan3.8LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2003BuickCenturySedan3.1LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2003BuickRegalSedan3.8LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2002BuickCenturySedan3.1LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2002BuickRegalSedan3.8LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2002OldsmobileIntrigueRear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2001BuickCenturySedan3.1LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2001BuickRegalSedan3.8LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2001OldsmobileIntrigueRear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2000BuickCenturySedan3.1LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2000BuickRegalSedan3.8LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
2000OldsmobileIntrigueRear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
1999BuickCenturySedan3.1LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
1999BuickRegalSedan3.8LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
1999OldsmobileIntrigueRear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
1998BuickCenturySedan3.1LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
1998BuickRegalSedan3.8LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
1998OldsmobileIntrigueRear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
1997BuickCenturySedan3.1LV6Rear RightWindow regulator suitable for vehicle's proper fit and function.; Window Regulator
1997BuickRegalSedan3.8LV6Rear RightWindow 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.

This part directly replaces or is cross-referenced with the following part numbers:

13891762106114251K2M139320594135495883579044378001637994383839510389236438932024056440564CP47417064741708271E3ZZ6148AE6TZ6148AM40058MG4012N4012T8325MX

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.