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Does anyone know the Bosch Part # for the Hammer???
The model number is KTS-300 and the part number is 0-684-400-300 but they are NLA so your best bet is eBay. The Porsche specific ROM module should still be available from PCNA. Another option might be Doug Boyce's free diagnostic software for the 964. The keyword protocol should be the same so all you would need to change is the baud rate and actual value RAM addresses in the ASCII config file.