Feuling FE-9954 MAP Sensor for Sportster 07-21/Touring 08-16 w/Throttle By Wire/Softail 16-17/Dyna Low Rider S 16-17Map Sensor Fits TC '08 '17 Fuel Injected touring models and late model XL's replaces OEM # 32319 07 The manifold absolute pressure sensor (MAP) provides instantaneous manifold pressure information to the engine's electronic control unit (ECU). The data is used to calculate air density and determine the engine's air mass flow rate, which in turn determines the required fuel metering for optimum combustion and influence the advance or retard of ignition