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Heated Oxygen Sensor (Ho2S) Removal/Installation: Notes

WARNING:
  • A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.
  1. Remove the battery cover.
  2. Disconnect the negative battery cable.
  3. Remove the plug hole cover.
  4. Disconnect the HO2S connector.
  5. Remove in the order indicated in the figures.

California emission regulation applicable model 

Fig 1: Heated Oxygen Sensor (HO2S) Removal/Installtion & Torque Specifications (California)
G03636134Courtesy of MAZDA MOTORS CORP.

Except for California emission regulation applicable model 

Fig 2: Heated Oxygen Sensor (HO2S) Removal/Installtion & Torque Specifications (Except California)
G03636135Courtesy of MAZDA MOTORS CORP.
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