Ford C-Max Focus Rear Window Manual Regulator Left N/S AM51-R27001-AE

Ford C-Max Focus Rear Window Manual Regulator Left N/S is an original component from the Window regulators and motors group, designed for precise operation of the window in the rear left door. The product comes from dismantling, which allows for maintaining factory fitment and a proven design consistent with Ford standards, while simultaneously reducing repair costs.

Specifications and technical data

• SKU: AM51-R27001-AE
• Mark: Ford
• Condition: Used
• OEM Part Number: AM51-R27001-AE
• Substitutable numbers: AM51-R27001-AE, AM51R27001AE
• Location on the vehicle: Rear, Left
• Gearbox type: Manual
• Part type: Window Regulator
• Category: Window Motors & Regulators

Purpose and function of the regulator

The rear left window regulator in the Ford C-Max and Focus is responsible for stable window guidance as well as smooth raising and lowering in the rear left door. This component works with the window control mechanism, ensuring proper guidance in the rails, uniform movement, and the reduction of play that could cause noise or leaks. Thanks to its factory design, the regulator maintains the correct geometry of mounts and support points, which facilitates installation and allows for seamless integration with the vehicle's existing door system.

Compatibility with the vehicle system

The presented component is intended for installation in the rear left part of the body, in the passenger door area. It has been designed to work with vehicles equipped with a manual transmission, which is important when selecting parts for a specific car configuration. Using an original Ford solution allows for maintaining consistency with the factory window control system and other door components. When selecting a regulator, it is worth paying attention to compliance with manufacturer markings and interchangeable numbers – this enables precise matching to a specific model version and year, without the need for modifications or adaptations.

Benefits of using an original regulator

Using an original window regulator in a Ford C-Max or Focus brings a number of practical technical benefits:

• maintenance of factory window operating characteristics (speed, smoothness, range of motion),
• proper fit with the door structure and mounting points,
• reduction of the risk of jams, skips, and excessive play in the mechanism,
• compatibility with existing door equipment (rails, mounts, seals),
• possibility of economical repair while maintaining original build quality. For the user, this means stable window operation, the absence of unwanted sounds while driving, and the maintenance of proper door sealing, which affects acoustic comfort and protects the interior from moisture.

Selection and installation in service practice

When selecting a window regulator for a Ford, it is worth using OEM markings and reference numbers to avoid confusion between body versions or model generations. In workshops, it is standard practice to verify compatibility by numbers and by location on the vehicle, which minimizes the risk of purchasing an incompatible part. The installation itself, performed by an experienced service, usually involves removing the door upholstery, disconnecting the old mechanism, transferring necessary equipment components, and installing the regulator in the factory mounting points. Using an original design shortens work time and limits the need for additional adjustments.

Ford window regulators and motors – expansion and repairs

If you are planning a comprehensive repair or upgrade of the door area in your Ford and need other elements from the same group, such as window lifting mechanisms, electric drives, or rails, check the available parts in the Ford window regulators and motors category.

More about used powertrain components

When planning broader service work on the vehicle, including the drivetrain, it is worth learning the principles of safe selection of used components and the real cost differences between new and used parts. A detailed discussion of this topic, along with procedures for selection by VIN and OEM, can be found in the guide Why it is worth buying used gearboxes and engines – facts instead of myths.