Ford Transit Custom Rear Door Trunk Lock Mechanism Left N/S BK21-V431A03-AM

Ford Transit Custom Rear Door Trunk Lock Mechanism Left N/S is an original component from the Locks and latches group, designed for the rear left side of the vehicle body. It enables proper locking and unlocking of the rear doors, ensuring a secure closure and safe vehicle operation. This used component is a practical service solution, allowing for the efficient replacement of a damaged lock without the need for a costly purchase of a new part.

Specifications and technical data

• SKU: BK21-V431A03-AM
• Mark: Ford
• Condition: Used
• OEM Part Number: BK21-V431A03-AM
• Substitutable numbers: BK21-V431A03-AM, BK21V431A03AM
• Location on the vehicle: Rear, Left
• Color: Arktis Arctic Metallic - A34
• Category: Exterior Locks & Lock Hardware

Purpose and function of the lock

The rear left door lock is responsible for the mechanical latching of the door leaf in the rear part of the body, working in conjunction with hinges, the handle, and any rods or central locking mechanisms. A correctly selected component guarantees:

• secure door closure in both vertical and horizontal axes,
• stable retention of the door leaf during driving and while parked,
• proper cooperation with the factory opening mechanism,
• reduction of play and unwanted vibrations of the rear doors.

Its placement in the rear zone, on the left side of the vehicle, makes this element essential for the comfort of daily cargo area operation and the security of transported goods.

Construction, color, and fitment

The lock has been designed as a part dedicated to a specific rear door configuration, which translates into proper positioning relative to the strikers and body panels. The Arktis Arctic Metallic - A34 color allows for aesthetic matching to the bodywork in the same paint tone, which is particularly important for visible parts of the housing or mounting elements.

The original Ford origin helps maintain the factory operating parameters of the mechanism, such as latch travel, closing characteristics, and compatibility with existing door mounts. Thanks to this, the installation process is straightforward, without the need for structural modifications.

Condition, service application, and benefits of installation

The item is offered as a used part, which is a beneficial solution for users looking for a reasonable compromise between repair costs and maintaining the original vehicle specifications. Replacing a faulty lock with a functional equivalent allows you to:

• restore proper rear door locking,
• reduce the risk of the door opening spontaneously while driving,
• limit noise resulting from improper closure or play,
• maintain the functionality of the cargo area at the expected level.

Selecting the right lock for a specific Ford model is crucial for maintaining full compatibility with the door structure and locking system. Proper component fitment minimizes installation time and reduces the risk of operational problems in the future.

Practical application and support in part selection

In the case of heavily used commercial vehicles such as the Ford Transit Custom, the rear door lock is exposed to frequent opening and closing cycles, as well as stresses resulting from operation in difficult conditions. Replacing a worn-out element with a functional unit from the same design group allows you to maintain vehicle functionality without unnecessary service downtime. In case of doubts regarding selection, it is worth verifying the part's compatibility with the specific body version and door configuration.

If you are planning a comprehensive repair or upgrade of the rear door locking zone in your Ford and need other elements from the same group, such as latching mechanisms, cylinders, or strikers, check out the available parts in the Ford Locks and latches category.

New or used – how to choose the optimal solution?

When choosing a rear door lock, many users consider whether a new or used part is the better solution. The decision is influenced by costs, availability, and the expected durability of the component. To consciously compare these aspects and match your service strategy to the vehicle's usage, it is worth consulting a reliable guide on the subject. The article Car parts – new or used? We compare costs, quality, and durability may be helpful, as it discusses the key differences between these solutions and indicates when choosing a used part is particularly justified.