Bentley Bentayga Rear Left Window Regulator 4M0839461A

Restore the premium operation of your vehicle’s rear cabin with this Genuine Bentley Rear Left Window Regulator. This authentic factory-original part (4M0839461A) is the essential mechanical lift assembly responsible for the smooth vertical travel of the rear driver-side door glass.

Specifically engineered to support the heavy dual-pane acoustic glass unique to the Bentley platform, this regulator features reinforced cable guides and high-durability pulleys to prevent the common "crunching" or "slipping" associated with aftermarket alternatives. As a factory-direct component, it ensures perfect alignment within the door shell, maintaining the precise seal required to eliminate wind noise and moisture ingress. This unit is the definitive solution for windows that are stuck, slow, or making abnormal mechanical noises during operation.

Vehicle Fitment & Compatibility:

• Bentley Bentayga: 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024

• Placement: Rear Door, Left Hand (LH) Driver Side Rear.

• Note: Fits all engine variants. Mechanical regulator only; reuse existing motor or purchase separately.

Part Number Reference:

• Current Part Number: 4M0839461A

• Related Numbers: 4M0-839-461-A, 4M0.839.461.A

• Note: This is the "A" revision, ensuring improved cable tensioning over earlier versions.

Pro Tech Tip: When the regulator fails, the heavy glass can often drop into the door. Mandatory: Use suction cups or non-marking tape to hold the glass in the fully closed position before beginning the removal of the old 4M0839461A. Caution: Before installing the new assembly, check the plastic window clips for any stress fractures. If the clips are damaged, the glass will not sit level, which can cause the regulator cables to snap under the uneven load. Always lubricate the side guide channels with a dry silicone spray to reduce the strain on the new motor and cable system.