Ford Transit Custom Mk1 Rear Door Limiter Check Strap Left N/S BK21-V44100-AF

Ford Transit Custom Mk1 Rear Door Limiter Check Strap Left N/S is a factory-original component of the rear door opening mechanism, designed for installation on the left side of the vehicle. It ensures controlled, stable positioning of the door leaf, which improves safety during loading and unloading operations. This is a practical solution for users who require reliable door guidance and want to limit uncontrolled door swing.

Specifications and technical data

• SKU: BK21-V44100-AF-1
• Mark: Ford
• Condition: Used
• OEM Part Number: BK21-V44100-AF
• Substitutable numbers: BK21-V44100-AF, BK21V44100AF
• Location on the vehicle: Rear, Left
• Part type: Door Lock
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The limiter is dedicated to the rear, left body section of the first-generation Ford Transit Custom. Its task is to mechanically limit the door opening angle and maintain it in a stable working position. Thanks to this:

• the risk of the door hitting the body or external obstacles is reduced,
• the door remains in a predictable position during loading,
• operating the cargo area is more ergonomic. The component works in conjunction with the hinges and the lock, creating a cohesive system responsible for safe and repeatable rear door opening.

Construction and technical characteristics

The limiter belongs to the Locks and Latches group of mechanical components, meaning it operates in the immediate vicinity of the door locking and guidance system. The construction is based on a metal body with moving pivot points, adapted for repeated opening and closing cycles under the operating conditions of a commercial delivery vehicle. The placement in the rear, left part of the body requires precise matching of the component's geometry to the shape of the door and the pillar, which is why using the correct limiter is crucial for maintaining the proper operation of the entire mechanism. A properly selected component minimizes stress on the hinges and reduces the load acting on the lock.

Benefits of using an original component

Using an original limiter dedicated to the Ford Transit Custom Mk1 allows for maintaining factory door performance parameters. The main advantages include:

• Structural compatibility – perfect fit to the body geometry and factory mounting points.
• Seamless cooperation with the existing hinge and lock system, without the need for body modifications.
• Predictable door behavior in various opening positions, which facilitates daily operation of the commercial vehicle. For fleet users and workshops specializing in the service of Ford commercial vehicles, this is a solution that allows for restoring the original functionality of the cargo area without mounting compromises.

Condition, installation, and service application

The offered limiter is a used part, which in practice means it comes from disassembly and is intended for re-installation after verification on the vehicle. This type of part is particularly useful in situations where:

• the rear door does not maintain a stable position after opening,
• the existing limiter has suffered mechanical damage,
• after a collision or intensive use, it is necessary to replace the door guidance component. Due to the specific placement on the vehicle, it is worth paying attention to the correct mounting side and compatibility with other components of the door system.

Part selection and related technical information

When selecting a limiter for the Ford Transit Custom Mk1, it is crucial to consider the mounting side and its classification in the Locks and Latches group, which facilitates searching for compatible elements in parts catalogs. In the case of comprehensive door area maintenance, it is also worth considering checking other components of the opening and locking mechanism. If you are planning to service other elements responsible for the safety and functionality of the body, the guide materials available in our knowledge section may be helpful. For example, when diagnosing high-pressure systems in diesel engines, it is worth reading the article on recognizing diesel injector faults and the consequences of neglecting them, which organizes basic service issues. For users looking for other door and locking mechanism elements, we have prepared a dedicated section of the store – you can find a full range of similar components in the Locks and Latches category. Additional installation tips, practical service advice, and descriptions of typical faults in commercial vehicles are available in our advice section, including an article dedicated to the most common problems with locks and door mechanisms.