The Vemo Diesel Glow Plug Controller (part number V15711031) is a component used in diesel engines to control the operation of the glow plugs. The glow plugs are responsible for heating the air inside the engine's combustion chamber, making it easier for the engine to start in cold weather. The Vemo Diesel Glow Plug Controller regulates the timing and duration of the glow plug operation, ensuring optimal performance and efficiency. This product is designed for use in diesel engines and is manufactured by Vemo. It is a reliable and essential component for diesel engine operation in cold weather conditions.