Fits 1996 2004 Mustang GT 4.6L Replacement Throttle Position Sensor 1685 map sensors Bolt on legendary ignition performance vacuum modulator lines Bolt on legendary ignition performance with MSD's direct replacement coils that are spec'd with superior materials and winding ratios to improve output while retaining the factory fit Keep the check engine light off with MagnaFlow HM Grade Federal EPA Compliant Direct Fit Catalytic Converter 50764 The sensor is usually located on the butterfly spindle or shaft so that it can directly monitor the position of the throttle for proper fuel delivery and ignition etc BBK Performance supplies a new throttle position sensor on most of their throttle bodies but if you have a stock or even aftermarket TPS sensor that is suspect and needs replacing then these direct replacement BBK Performance throttle position sensors are what you need to get your car running properly again