Genuine Mazda MX-5 Miata Crankshaft Position Sensor

Mazda MX-5 Miata Crankshaft Position Sensor Parts and Q&A

• Crankshaft Position Sensor
  L3G2-18-221
  Q: How is the Crankshaft Position Sensor removed and installed on Mazda MX-5 Miata?

  A:

  In models 1995 to 2005, the CKP sensor is located at the lower front section of the engine, and is to the left of the crankshaft pulley in 1995 to 1997 models, and to the right in 1999 to 2005 models, and the process of removal, adjustment and installation is the same. Unhook the cable on the negative battery terminal first, and then follow the wiring harness out of the CKP sensor and trace it to the electrical connector, unhooking it and releasing the harness of whatever retaining it. Unscrew the fitting bolt of the CKP sensor and dismount the sensor. During installation, place the sensor such that there is a distance between the sensor and one of the timing lugs on the timing plate ranging between 0.020 to 0.059 inch and firmly screw the mounting bolt. In the case of 2006 and subsequent models, the CKP sensor is fitted on the lower front of the engine, on the right of the crankshaft pulley. Begin by taking out the battery and battery tray then next out the air filter housing and serpentine drive belt. Lift the front of the vehicle up and stand it firmly on jackstands and then remove the under-cover on the engine compartment. Loose the electrical connector of the CKP sensor, and the mounting bolts and extract the sensor. To install, take the No. 1 piston to the TDC, check the CKP sensor trigger wheel or timing plate attached to the rear of the crankshaft pulley, and find the blank spot on the edge of the timing plate. Five teeth should be counted in a counterclockwise direction around this blank area and then a straight line should be drawn through the center of this fifth tooth and the center of the crankshaft pulley. Install the CKP sensor, by aligning its centre with the line drawn and tighten the sensor bolts. The rest of the installation is in the opposite sequence of uninstallation.