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This is an original BMW M54 Engine ECU kit unit for Z3, 3 Series, 5 Series E36, E46, E39 models. Made by Siemens in Germany, the part number is 12147509942. It includes the DME MS43 EWS key and comes with a warranty. The manufacturer part number is 12.14-7 509 942 7509942. It is a high-quality electronic control unit essential for the engine's operation.
