Smart Fortwo 451 Door Window Lifter Motor Regulator Front Left N/S A4517200746

Smart Fortwo 451 Door Window Lifter Motor Regulator Front Left is an original component from the Window regulators and motors group, designed for precise operation in the driver's door. The used motor ensures factory-fit compatibility with the electrical system and window lifting mechanism, facilitating efficient replacement without the need for modifications. This is a practical solution for users who want to restore the proper operation of the window in their Smart Fortwo 451 while maintaining compliance with the manufacturer's design.

Specifications and technical data

• SKU: A4517200746
• Mark: Smart
• Condition: Used
• OEM Part Number: A4517200746
• Substitutable numbers: A4517200746, A 451 720 07 46, SN914307
• Location on the vehicle: Front, Left
• Part type: Window Motor
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented window lifter motor operates in the front left part of the body, responsible for driving the window mechanism on the driver's side. Its task is to provide stable and repeatable raising and lowering of the window, maintaining the correct speed and smoothness of movement. Thanks to its factory design, compatibility with the original cabin controls and the vehicle's electrical system is maintained. Its placement in the driver's door means this component has a direct impact on daily driving comfort – from convenient use of parking lots and toll gates to proper interior ventilation. Using an original Smart solution reduces the risk of fitment issues, operating noise, or improper window closing.

Construction and fitment for Smart Fortwo 451

The front left window lifter motor has been designed specifically for the geometry of the Smart Fortwo 451 door, which translates into correct positioning relative to the guides and window frame. The construction is designed to work with the factory lifting mechanism, ensuring proper movement kinematics and loads applied to the mounts. Its original Smart origin means compliance with the electrical parameters specified by the manufacturer, such as rotation direction, torque, and operating characteristics under load. This is important for the durability of the entire system – including the motor, gears, and window guides.

Benefits of using an original window lifter motor

Using this component in a Smart Fortwo 451 allows for restoring proper operation of the driver's side window without the need to modify the installation. Key advantages include:

• factory fitment for the door and window lifting mechanism,
• preservation of original functionality of the controls from inside the vehicle,
• reduction of the risk of improper closing or jamming of the window,
• consistency with the electrical parameters specified for the Smart Fortwo 451. As a result, the installation process is orderly, and the user receives a solution consistent with the manufacturer's specifications, which promotes stable long-term operation.

Condition, origin, and selection by part numbers

The offered motor comes from disassembly and is a used component, which represents a reasonable compromise between repair costs and maintaining original build quality. In practice, this means the possibility of an economical replacement of a damaged window drive while maintaining compliance with the factory Smart specification. Selecting the correct motor for a specific version of the Smart Fortwo 451 should always be based on vehicle identification data and part numbers. In case of doubt, procedures based on OEM and reference numbers, described in more detail in the guide: Why it is worth buying used gearboxes and engines – facts instead of myths, may be helpful. The principles of selection by numbers contained therein can also be successfully applied to other components, such as window lifter motors.

Expanding repairs within the window system

If you are planning a comprehensive repair or upgrade of the door and window area in your Smart and need other elements from the same group, such as additional motors, regulators, or complete lifting mechanisms, check the available parts in the Smart window regulators and motors category. Such an approach allows you to organize the entire system responsible for window operation in a single service stage, which reduces the risk of further vehicle downtime and facilitates planning for future operation.