You are here: Home BemariM3Ex Specification ECUs ECU Comparison Autronic SM3 Autronic SM3 Autronic has just released the NEW SM3 ECU. Main difference is that SM3 doesn't support low impedance injectors and 1 variable camshaft is supported. Full spec is available here Unfortunately you have Javascript disabled, please enable Javascript in order to experience the comments correctly Post your comments... Name* Email Website Your comment*