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Home >> Mazda >> 2008 >> CX-9 FWD V6-3.7L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Oxygen Sensor >> Service and Repair >> Front Heated Oxygen Sensor (HO2S) Removal/Installation
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Front Heated Oxygen Sensor (HO2S) Removal/Installation

FRONT HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZI-3.7]

HO2S (LH) Removal/Installation
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Disconnect the HO2S (LH) connector.

NOTE: If necessary, lubricate the HO2S with Penetrating and Lock Lubricant loosen to aid in removal.




4. Remove the HO2S (LH) using the SST.

NOTE: Apply a light coat of anti-seize lubricant to the threads of the HO2S.

5. Install in the reverse order of removal.

HO2S (RH) Removal/Installation
1. Disconnect the negative battery cable.
2. Remove the following part for easier access.
1. Remove the cowl panel.

3. Disconnect the HO2S (RH) connector.

NOTE: If necessary, lubricate the HO2S with Penetrating and Lock Lubricant loosen to aid in removal.




4. Remove the HO2S (RH) using the SST.

NOTE: Apply a light coat of anti-seize lubricant to the threads of the HO2S.

5. Install in the reverse order of removal.
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