Bosch Glow Plug System Control Unit Genuine OE Quality Ignition Replacement. This Glow Control Unit (GCU) monitors and controls the glow plugs in an open loop, and is generally located within the engine. It has to fulfill high requirements regarding operating temperature, vibration, housing protection, and electromagnetic interference. Quantity Included: 1. Model number: 0 281 003 087. Country of Origin: United Kingdom. The package dimension of the product is: 77"L x50"W x50"H. The package weight of the product is: 20grms.