The Genuine BMW Ignition Starter Switch (part number 61316978372) is a high-quality replacement part for BMW vehicles. It is designed to control the starting and stopping of the engine, as well as the operation of various electrical components such as the radio, headlights, and power windows. This switch is made from durable materials and is built to strict BMW standards, ensuring reliable performance and longevity. It is a direct fit for specific BMW models and is an essential component for the proper functioning of the vehicle's ignition system.