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Fully rebuilt Bosch LH 2.3 fuel ECU.  Bosch part number  Porsche part number 928.618.123.11.  The factory multi layer circuit board is prone to failure in the Bosch LH 2.3.  If your ECU will not start the car and you hear injectors clicking with the ignition switch in the on position, there is a very good chance that your circuit board on the LH2.3 has failed.  This is a common failure on the LH 2.3.  The JDS Porsche upgraded LH 2.3 module has been proven time and time again as the best solution for the failed LH 2.3 module.  Your rebuidable core is required at this price.  These units carry a 2 year warranty.