Smart Fortwo C451 Boot Trunk Door Lock Bowden Cable Pulley Left N/S A4517400192

Smart Fortwo C451 Boot Trunk Door Lock Bowden Cable Pulley Left N/S is a precision component of the tailgate opening mechanism, belonging to the Internal locks and latches category. It is responsible for efficiently transferring movement from the lever or lock cylinder to the latching mechanism, ensuring convenient and predictable trunk opening. This used original Smart component is a sensible choice when servicing the lock mechanism in the Fortwo C451 model.

Specifications and technical data

• SKU: A4517400192
• Mark: Smart
• Condition: Used
• OEM Part Number: A4517400192
• Substitutable numbers: A4517400192, A 451 740 01 92
• Location on the vehicle: Left
• Category: Interior Locks & Lock Hardware

Purpose and function of the Bowden cable

The described Bowden cable operates in the tailgate lock control system on the left side, responsible for the linear transfer of force from the control element to the latch. Thanks to its precisely selected length, routing, and end fittings, it ensures stable cooperation with the factory Smart Fortwo C451 lock, without the need for modifications or adaptations.

A properly selected cable eliminates common problems such as the lock failing to respond, the need for excessive force, or incomplete unlocking of the tailgate. Replacing a worn component with an original cable from the same production series allows for the restoration of the correct operation of the entire mechanism.

Construction and fitment for Smart Fortwo C451

The Bowden cable used in the Smart Fortwo C451 is configured for specific routing within the bodywork and the geometry of the tailgate lock. Appropriate end fittings on both sides allow for secure seating in levers and brackets, which reduces operating play and improves consistency of operation.

The placement on the left side of the vehicle is significant for both the length of the cable and the way it is routed. Correct selection of the mounting side is crucial to avoid tension, chafing, and improper positioning in the guides. Using an original Smart solution helps maintain the factory standard of lock operation.

Benefits of using an original Smart component

Choosing an original Bowden cable from the Internal locks and latches group for the Smart Fortwo C451 primarily ensures compatibility with the factory mechanism. The component was designed for a specific model, allowing it to maintain the correct operating parameters, travel, and force characteristics required to open the tailgate.

A used OEM component often allows for reduced repair costs while maintaining high quality of workmanship and fitment. This is a practical solution when servicing the trunk mechanism, especially when symptoms such as a stiff lock, incomplete unlocking, or noticeable skipping during opening occur.

Application in repairs and tailgate mechanism diagnostics

The left-side tailgate lock Bowden cable is one of the elements worth considering when diagnosing problems with opening the rear of the vehicle. Replacing this component is often performed alongside the adjustment or service of the lock itself, which allows for the restoration of consistent operation of the entire system.

If you are planning a comprehensive repair or upgrade of the tailgate area in your Smart and need other elements from the same group, such as rods, latches, or control mechanisms, check out the available parts in the Smart Internal locks and latches category.

Why it is worth choosing used originals

The growing interest in used OEM components stems from their excellent fitment for specific models and stable build quality. In the case of components such as the tailgate lock Bowden cable, an original solution often ensures better cooperation with the factory lock than universal aftermarket replacements.

If you want to better understand why the market is increasingly choosing used OEM components, even for premium segment cars, it is worth reading the article Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026, which discusses current trends and a practical approach to vehicle repairs.