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Home >> Mazda >> 2021 >> 3 Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Control System (VIN Y)) >> Engine Coolant Temperature (ECT) Sensor Removal/Installation >> ECT Sensor No. 2

ECT Sensor No. 2

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
  2. Remove the front under cover No. 1 and the front under cover No. 2. (See FRONT UNDER COVER No. 1 REMOVAL/INSTALLATION .) (See FRONT UNDER COVER No. 2 REMOVAL/INSTALLATION .)
  3. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
  4. Disconnect the ECT sensor No. 2 connector.
  5. Remove the ECT sensor No. 2 using the SST.
    Fig 1: Engine Coolant Temperature Sensor No. 2 With Torque Specification
    G13714465Courtesy of MAZDA MOTORS CORP.
  6. Install in the reverse order of removal.
  7. Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
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