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Home >> Mazda >> 2007 >> 5 Touring, 2.3 L >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [Engine (L3)] >> Heated Oxygen Sensor (Ho2S) Removal/Installation >> Notes
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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. (See BATTERY REMOVAL/INSTALLATION [L3] ).
  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 table.
    HO2S REFERENCE CHART

    1 Front HO2S
    (See HO2S REMOVAL NOTE ).
    2 Wiring harness bracket
    (See WIRING HARNESS BRACKET INSTALLATION NOTE ).
    3 Rear HO2S
    (See HO2S REMOVAL NOTE ).
    Fig 1: HO2S Location & Torque Specification
    G04316103Courtesy of MAZDA MOTORS CORP.
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