Abstract: There is disclosed herein an electronic control module assembly 30 for use in an internal combustion engine, wherein the engine includes an intake manifold 10 with N air inlet port(s) 14 and a throttle body 20 with N air outlet port(s) 24 where N=(1 or 2). One embodiment of the assembly 30 comprises: (a) a housing 32 having opposed upper and lower mounting surfaces 34/36 and an outer surface 38 about the housing, and N bore(s) 42 through the housing, wherein each bore has an upstream port 44 defined in the upper mounting surface 34 and a downstream port 54 defined in the lower mounting surface 36; (b) an electronic control module 60 for controlling one or more sub-systems of the engine; and (c) means 70 for attaching the electronic control module 60 to the outer surface 38 of the housing 32.