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Home >> Mazda >> 2023 >> 3 Preferred, 4D Hatchback >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (VIN M) >> Engine Coolant Temperature (ECT) Sensor Removal/Installation >> With EGR Cooler
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With EGR Cooler

  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)] .)
  2. Remove the front under cover No. 2. (See FRONT UNDER COVER No. 2 REMOVAL/INSTALLATION .)
  3. Remove the front under cover No. 1. (See FRONT UNDER COVER No. 1 REMOVAL/INSTALLATION .)
  4. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
  5. Disconnect the ECT sensor connector.
  6. Remove the ECT sensor No. 1 using the SST.
    Fig 1: ECT Sensor No. 1 Bolt With Torque Specification
    G15654593Courtesy of MAZDA MOTORS CORP.
  7. Install in the reverse order of removal.
  8. Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
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