Genuine OEM BMW variable valve timing solenoid, part number 11368605123. This solenoid regulates the flow of engine oil to the camshaft adjustment units, enabling precise control over valve timing for improved efficiency and power. It is a critical component of the engine management system. Genuine OEM solenoids are essential because they are calibrated to the exact electrical resistance and hydraulic flow requirements of the engine's oil control system, ensuring accurate timing adjustments and preventing engine performance issues.