Mini Cooper One R50 R53 R55 R56 R57 Front Left N/S Door Latch Lock Actuator

Mini Cooper One R50 R53 R55 R56 R57 Front Left N/S Door Latch Lock Actuator is a precision locking actuator designed for installation in the front left door of Mini R50, R53, R55, R56, and R57 series models. As a component from the Locks and Latches group, it is responsible for secure closing, unlocking, and integration with the central locking system and door handle mechanism, ensuring convenient and safe operation of the driver's door.

Specifications and technical data

• SKU: lhd-0556768
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 0556768
• Substitutable numbers: 51200556768, 0556768, 51214433804, 4433804, 51214350971, 4350971, KZ
• Location on the vehicle: Front, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock actuator is dedicated to the front left door, i.e., the driver's side in Mini Cooper / One cars of the R50, R53, R55, R56, and R57 generations. It is responsible for:

• mechanical locking and unlocking of the door from the inside and outside,
• integration with the central locking system and remote control,
• transferring movement from the door handle to the lock mechanism,
• maintaining a stable door position while driving.

Thanks to its factory design tailored to the Mini platform, the lock maintains the correct mounting geometry and proper compatibility with the electrical harness and door handle mechanism.

Construction and technical properties

The Mini front left door lock actuator is designed as a complete locking unit, combining a mechanical part with an electric drive. The applied construction ensures:

• stable guidance of the latch and components interacting with the handle,
• appropriate housing rigidity, reducing play and noise during operation,
• compatibility with the factory Mini central locking system,
• the possibility of direct installation in original mounting points.

This solution allows for maintaining factory door operating parameters, including smooth closing, predictable locking, and correct interaction with the vehicle's electronics.

Benefits of using an original Mini lock

Using an original front left door lock in a Mini Cooper / One brings a number of practical benefits:

• High installation compatibility – no need for alterations, adjustments, or modifications to the installation.
• Consistent operation with the central locking system – correct locking of all doors and predictable response to remote control signals.
• Reduction of operational problems – lower risk of the handle jamming, door not closing, or random unlocking.
• Safe vehicle use – a properly functioning lock increases protection against unauthorized door opening.

As a component from the Locks and Latches group, this actuator is particularly important in vehicles experiencing symptoms such as no response to the remote control, problems with opening from the inside, or the need to slam the door multiple times.

Condition, fitment, and practical application

The offered lock is a used component, which allows for an economical repair of the locking system while maintaining the original Mini design. This solution is recommended both for typical replacement of a worn-out lock and for repairs after a collision or problems with the central locking system in the driver's door area.

Thanks to the preservation of the factory design, installation proceeds in a manner similar to the manufacturer's service procedures, and after installation, the lock can work with the existing electrical harness and door handle mechanism without additional adaptations.

Upgrade expansion and knowledge about used parts

If you are planning a comprehensive repair or upgrade of the door and lock area in your Mini and need other components from the same group, such as actuators, cylinders, or locking mechanisms, check the available parts in the Mini Locks and Latches category.

When selecting used locking components, it is worth knowing the typical mistakes made when purchasing parts from the secondary market – you will find practical tips and warnings in the article Buying used car parts – the most common mistakes when choosing tuning parts, which will help you consciously plan further modifications to your Mini.