2007 Mazda 3 L4-2.3LFACTORY OEM SERVICE PROCEDURE

Crankshaft Position Sensor: Service and Repair

CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION[LF, L3]

REMOVAL
1. Remove the battery cover.
2. Disconnect the negative battery cable.
3. Remove the plug hole cover.
4. Perform the following procedure for easier access.
1. Remove the front tire (RH).
2. Remove the splash shield.

5. Disconnect the CKP sensor connector.
6. Remove the installation bolt and remove the CKP sensor.

INSTALLATION

CAUTION: When foreign material such as an iron chip is on the CKP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect the engine control. Be sure there is no foreign material on the CKP sensor when replacing.

Factory service manual diagram



1. Perform the following procedure so that cylinder No.1 is at TDC.
1. Remove the cylinder block lower blind plug and install the SST.
2. Rotate the crankshaft pulley clockwise until the crank weight contacts the SST so that cylinder No.1 is at TDC.

Factory service manual diagram



2. Fit the center of the CKP sensor with the fifth tooth (counting counterclockwise from the empty space A as shown in the figure) of the pulse wheel.
3. Install the CKP sensor fitting bolts.

Tightening torque : 5.5 - 7.5 Nm {56 - 76 kgfcm, 4.1 - 5.5 ft-lbf}

4. Remove the SST then install the cylinder block lower blind plug.

Tightening torque : 18 - 22 Nm {1.9 - 2.2 kgf-m, 14 - 16 ft-lbf}
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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