Smart C451 Fortwo Door Window Regulator Lifter Front Right O/S A4517200646

Smart C451 Fortwo Door Window Regulator Lifter Front Right is a factory component from the Window regulators and motors group, designed for precise operation of the passenger side window in the Smart Fortwo C451 model. A properly selected regulator ensures stable mechanism operation, correct window guidance, and predictable performance during every opening and closing cycle.

Specifications and technical data

• SKU: A4517200646
• Mark: Smart
• Condition: Used
• OEM Part Number: A4517200646
• Substitutable numbers: A4517200646, A 451 720 06 46
• Location on the vehicle: Front, Right
• Part type: Regulator & Motor Assembly
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The front right window regulator in the Smart Fortwo C451 is responsible for transferring drive from the control system to the passenger door window. This component works with the vehicle's electrical system, enabling smooth raising and lowering of the window while maintaining proper guidance geometry. Thanks to its dedicated placement in the front, right zone, the design is matched to the passenger side door, which minimizes the risk of stress, jamming, and excessive wear of guides and seals.

Benefits of using an original regulator

Using an original regulator in the Smart Fortwo C451 allows for maintaining the factory operating parameters of the window mechanism. Proper fitment to the door and body translates into:

• stable window guidance throughout the entire range of motion,
• reduction of noise and vibrations during operation,
• correct cooperation with the factory window control system,
• reduced risk of electrical system overload. Choosing such a solution is particularly important for repairs where parameter repeatability and maintaining the original characteristics of the window system are essential.

Installation characteristics

The regulator is designed for installation in the front right door of the Smart Fortwo C451, replacing the factory mechanism. The design prepared for a specific body model facilitates service, shortens replacement time, and allows for the retention of original mounting points. As a result, a mechanic or a user with appropriate tools can carry out the replacement in an orderly manner, without the need for modifying the door structure or electrical installation, which promotes the consistency of the entire system.

Component condition and practical application

The offered window regulator is a part from the Window regulators and motors category, which will prove useful both for typical repairs after a mechanism failure and for restoring full door functionality after a collision or bodywork intervention. The used component allows for an economical restoration of system efficiency while maintaining proper fitment to the specific Smart model. In practice, this means the ability to restore correct passenger side window operation without compromises regarding compatibility with the factory control system and door structure.

System expansion and selection of related components

If you are planning a comprehensive repair or upgrade of the door and window zone in your Smart and need other elements from the same group, such as lifting mechanisms, drives, or control motors, check the available parts in the Smart Window regulators and motors category. When selecting components for mechanical and electrical systems in a vehicle, it is worth following not only model designations but also OEM numbers and interchangeable numbers. A detailed discussion of the principles of selecting parts by factory numbers, along with practical examples and an analysis of the cost-effectiveness of purchasing used components, can be found in the guide: Why it is worth buying used gearboxes and engines – facts instead of myths.