Ford Focus Mk3 Driver's Door Lock Cylinder Barrel 3M5A-R220K51-AG

Ford Focus Mk3 Driver Door Lock Cylinder 3M5A-R220K51-AG is an original part from the locks and latches category, designed for the mechanical operation of the driver's door lock. This is a practical solution for users who want to restore efficient, secure, and convenient door locking in their third-generation Ford Focus.

Specifications and technical data

• SKU: 1552849
• Mark: Ford
• Condition: Used
• OEM Part Number: 1552849
• Substitutable numbers: 1552849, 3M5A-R220K51-AG, 3M5AR220K51AG
• Part type: Door Lock
• Category: Exterior Locks & Lock Hardware

Purpose and Function of the Driver's Door Lock Cylinder

The driver's door lock cylinder is responsible for the interaction between the mechanical key and the door lock. A correctly selected part ensures:

• secure locking of the driver's door using the key, independent of the central locking system,
• mechanical vehicle unlocking in emergency situations (e.g., discharged battery),
• stable cooperation with the lock cylinder and mechanism in the Ford Focus Mk3 door.

By using the appropriate cylinder from the locks and latches group, the correct operation of the entire driver's door mechanism is maintained, which contributes to the comfort of daily car use.

Technical Characteristics and Fitment

The presented cylinder comes from Ford's factory parts family, which promotes precise fitment to the construction of the third-generation Focus door. The appropriate body geometry and cooperation with the locking mechanism allow for:

• correct seating in the door panel without the need for modifications,
• compatibility with the original lock mechanism and internal door linkages,
• maintenance of factory operating ergonomics – the key operates in a predictable, repeatable manner.

Selecting the part based on the OEM part number and interchangeable numbers (visible in the specifications) facilitates verification of compatibility with the specific equipment version and vehicle year.

Condition, Application, and Benefits of Installation

The offered lock cylinder belongs to the group of used locks and latches, which is an advantageous solution for drivers looking for an economical yet structurally compatible part. Replacing a damaged or seized cylinder with a functional part allows for:

• restoring the full functionality of the driver's door lock,
• increasing parking security through proper locking,
• reducing the risk of key damage resulting from operation in a jammed or worn mechanism.

This is a practical option for both post-accident repairs and typical wear and tear of the lock mechanism.

Why Choose Ford Locks and Latches for the Focus Mk3

Using parts from the Ford locks and latches group ensures consistency with the vehicle's factory construction. A correctly selected cylinder ensures:

• compatibility with the original key and locking system,
• stable mechanism operation over a longer period of use,
• easier diagnostics and servicing in case of future inspections or repairs.

If you need other parts from the locks and latches category for this brand, check the available Ford locks and latches to select a complete solution for your car.

Additional Information and Preparing Your Car for the Season

Replacing the driver's door lock cylinder is particularly important before the winter season, when low temperatures and moisture can exacerbate problems with the locking mechanism. It is also worth checking other components responsible for daily vehicle operation at this time. Practical tips can be found in the guide Winter Essentials: Which Used Car Parts Are Worth Checking and Replacing Before the Frost?, which describes how to comprehensively prepare your car for low temperatures.