ACI 84598 Window Regulator - Front Left

Front Left Power Window Regulator for BMW

Restore smooth power window movement with this ACI Window Regulator, part number 84598. It is a new front left power window regulator built to meet or exceed OEM requirements for proper fit and function on select BMW models.

Compatible with BMW 318i, 323i, 323is, 328i, 328is, M3, 318is, 325i, and 325is applications, this regulator is a direct-fit replacement for the driver-side front door window mechanism. ACI 84598 is a practical choice when the original regulator is worn, binding, or no longer holding the glass correctly.

Key Features

• Brand: ACI Window Regulator
• Part number: 84598
• Front left mounting position
• Power window operation
• New replacement part
• Motor not included
• Mounting hardware not included
• Meets or exceeds OEM specifications

Product Details

This ACI power window regulator is engineered for the front left door and is intended for BMW vehicles that use a power-operated window system. It is a new replacement regulator, not remanufactured, and is built to restore controlled glass travel in the door assembly. The ACI Window Regulator line focuses on replacement components for door window service, and this part cross-references Continental WR51140 for the same application.

Use ACI 84598 when servicing a BMW 318i, 328i, or M3 front left window that has become slow, noisy, uneven, or inoperative. The regulator is specified for proper fit and function across the listed BMW 3 Series applications.

Common Problems This Part Can Address

• Window glass will not raise or lower with the switch
• Window moves unevenly or binds in the door
• Grinding, popping, or cable-related regulator noise
• Window drops into the door or loses support
• Intermittent or failed power window operation

Installation Notes

Verify the vehicle’s front left door application before installation. This regulator is for power window systems and does not include the motor, so reuse or replace the motor as needed based on the vehicle’s condition. Confirm alignment of the glass, tracks, and door hardware during installation to help ensure smooth operation after service.

Quality Assurance

ACI 84598 is a new part built to meet or exceed OEM specifications for fit and function. It is intended as a direct replacement for the original front left window regulator on the listed BMW applications.