Abstract: A system is described for measuring the angular position of an internal combustion engine crankshaft, comprising a magnetic sensor and at least two projections provided on a flywheel which is rigid with the crankshaft. The main characteristic of the present invention is that the sensor has its longitudinal axis parallel to the axis of the crankshaft and is supported by that portion of the crankcase which faces the flywheel. As the projections pass in proximity to the sensor, this latter generates an electrical pulse which is utilized in a central control unit for electronic ignition and/or electronic injection.