Smart Fortwo A453 Fuel Filler Flap Lock Opener Actuator Unit A4537500300

The Smart Fortwo A453 fuel filler flap lock actuator is a precise component of the filler neck locking mechanism, responsible for securely locking and unlocking the flap during refueling. As an original Smart component, it ensures a proper fit to the bodywork and correct cooperation with the factory lock system. A used part from this group allows for an economical yet technically sound repair of the fuel filler access system.

Specifications and technical data

• SKU: A4537500300
• Mark: Smart
• Condition: Used
• OEM Part Number: A4537500300
• Substitutable numbers: A4537500300, A 453 750 03 00
• Part type: Fuel Door Lock
• Category: Fuel Flaps & Components

Function and Application of the Fuel Filler Flap Actuator

The fuel filler flap lock actuator in the Smart Fortwo A453 model is responsible for mechanically transferring the control movement to the bolt that locks the flap. A correctly functioning component:

• ensures controlled access to the fuel filler only when the vehicle is unlocked,
• stably holds the flap in the closed position while driving,
• reduces the risk of damage to the flap and filler neck housing resulting from incomplete closure,
• cooperates with the vehicle's factory central locking system.

By maintaining its original geometry and mounting points, the actuator from this series allows for installation without structural modifications, which is particularly important in the bodywork area related to the fuel system.

Benefits of Using an Original Smart Actuator

Using an original Smart fuel filler flap actuator translates to high repeatability of the mechanism's operation and compatibility with factory wiring and locks. Compared to aftermarket alternatives, an OEM component offers:

• a secure fit with the flap housing and bodywork elements,
• retention of factory stroke and operating force parameters,
• a lower risk of problems with flap closure or locking,
• easier diagnostics for further service work.

For Smart Fortwo A453 owners, this means stable operation of the fuel filler flap lock system and a reduction in unplanned downtime related to refueling issues.

Condition, Verification, and Preparation for Installation

The offered actuator comes from the Fuel Filler Caps and Accessories group, which guarantees its suitability for operation in direct proximity to the fuel system. The component is used, allowing for a cost-effective service while maintaining the original design specifications. Before being offered, such components are routinely verified for:

• smooth operation of the working mechanism,
• condition of the housing and mounting points,
• absence of visible damage affecting installation or function.

An actuator prepared in this way can be used as a direct replacement for a damaged component in the vehicle, without the need for installation modifications.

Integration with the Fuel System and Operation

A functional fuel filler flap lock actuator is important not only for user convenience but also for vehicle operational safety. Proper flap locking restricts access to the filler cap and protects the refueling area from external contaminants. In the context of the entire fuel system, it is also worth ensuring the condition of other components – detailed information regarding diagnostics, selection by factory numbers, and operating principles can be found in the article: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair.

Expanding Fuel Filler Area Service in Smart

If you are planning a comprehensive repair or upgrade of the fuel filler area in your Smart and need other parts from the same group, such as flaps, mounts, or additional accessories, check the available parts in the Smart Fuel Filler Caps and Accessories category.

Summary

The Smart Fortwo A453 fuel filler flap lock actuator is a technically matched, original component designed to restore the proper operation of the filler neck locking mechanism. Choosing a used OEM component allows for a rational repair cost while maintaining the factory design and compatibility with the vehicle's bodywork and lock system.