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Home >> Mazda >> 2011 >> 3 Mazdaspeed, 2.3 4 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [L3 With TC] >> Heated Oxygen Sensor (Ho2S) Removal/Installation
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Heated Oxygen Sensor (Ho2S) Removal/Installation

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 WITH TC] ).
  2. Disconnect the negative battery cable.
  3. Disconnect the HO2S connector.
  4. Remove the HO2S using the SST.
  5. Install in the reverse order of removal.
    Fig 1: Heated Oxygen Sensor (HO2S) With Torque Specifications
    G07868479Courtesy of MAZDA MOTORS CORP.
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