Ford Focus Mk2 C-Max Front Door Lock Latch Mechanism Right O/S 3M5A-R21812-MT

Ford Focus Mk2 C-Max Front Door Lock Latch Mechanism Left N/S is an original locking mechanism designed for installation on the driver's side. This component from the Locks and latches category is responsible for securely closing the door, proper locking, and seamless integration with the vehicle's factory opening system, ensuring safe daily use of the car.

Specifications and technical data

• SKU: RHD-3M5A-R21812-MT
• Mark: Ford
• Condition: Used
• OEM Part Number: 3M5A-R21812-MT
• Substitutable numbers: 3M5A-R21812-MT, 3M5AR21812MT, 4976084, 3M5A-R21812-MU
• Location on the vehicle: Front, Right
• Part type: Door Lock
• Category: Exterior Locks & Lock Hardware

Purpose and vehicle placement

The presented lock mechanism is dedicated to the front door on the left side of the body, which is the area most frequently used by the driver. Its placement in the front-left area allows for a direct replacement of the factory lock without interfering with the door structure, maintaining the original mounting geometry and proper operation with the handle and linkages.

By maintaining the correct installation direction, the lock keeps the latch tongue in the proper position relative to the body pillar, which reduces the risk of play, rattling, and leaks around the door.

Technical and functional characteristics

The mechanism belongs to the Locks and latches group, responsible for controlling access to the cabin and stable closing of the door panel. The lock design is prepared to work with the factory control system in the Ford, which facilitates integration with the existing vehicle installation.

The solution is based on a precise system of levers and pawls that transfer movement from the external and internal handles to the latch tongue. The properly selected geometry of the working elements promotes smooth operation of the mechanism, and the correct fit with the door minimizes resistance when opening and closing.

Original origin and condition

The offered lock comes from the Ford product line, which means it maintains factory manufacturing standards and fitment to the body. As a used part, it provides a favorable compromise between purchase cost and maintaining the original manufacturer's specifications, which is particularly important for maintenance repairs.

Choosing an original, used lock allows you to maintain the structural integrity of the door, avoiding problems typical of replacements with imprecise fitment, such as difficult closing or improper handle operation.

Benefits of using the front left door lock

Using this mechanism in a Ford Focus Mk2 or C-Max brings a number of practical benefits:

• maintaining the factory method of opening and locking the door on the driver's side,
• reducing the risk of accidental door opening while driving thanks to stable locking,
• compatibility with the door and body pillar structure,
• possibility of replacing a damaged lock without bodywork modifications.

For the user, this means more predictable door operation, improved comfort in daily use, and reduced noise resulting from an improperly closed door.

Repair expansion – Ford Locks and latches

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

More about the advantages of used parts

If you are considering wider use of aftermarket components and want to better understand their potential in terms of costs, quality, and environmental impact, it is worth reading our guide: Used parts for BMW – is it worth it? Key benefits for brand fans. You will find universal tips there that help you consciously choose used components for other brands as well, including Ford.