Genuine OEM Citroen Front Left Door Lock Cylinder, part number 1631728580. This cylinder is the key-operated component of the door locking system, allowing for manual entry and securing of the vehicle. It is typically located within the front left door handle assembly, providing external access to the locking mechanism. This precision-engineered component ensures reliable key operation. Using a genuine OEM lock cylinder guarantees compatibility with the vehicle's key system and provides the intended level of security and durability.