Bosch Fuel Pump / Jetronic ECU Relay controller Up for sale is a Bosch Fuel Pump / Jetronic turn-on controller relay. This is the primary cause of non non working fuel pump, or power cutting out to the fuel pump. This translates to a car that will stall randomly or one that won't start. The pins on the relay can become burnt or the internal points or springs wear out. This unit was checked and tested and is functioning normally. This is a bargain price for this unit! We will offer a 30 day functionality warranty on this unit. Fits many European cars, check the part number off your original to be sure if this is right for your car. This originally installed in a crash damaged 1981 BMW 633CSI . Nice and clean, good working condition!