2017 Mazda CX-5 Grand Select, AWDFACTORY OEM SERVICE PROCEDURE

Engine Coolant Temperature (ECT) Sensor Removal/Installation

Special Service Tool (SST) 

1: 49 D015 001
2: -
Box wrench
G11427369Courtesy of MAZDA MOTORS CORP.

Replacement Part 

O-ring

Quantity: 1

Location of use: ECT sensor

WARNING:
  • A hot engine can cause severe burns. Turn off the engine and wait until it is cool before removing the ECT sensor.
  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  2. Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
  3. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
  4. Pull out the evaporative hose No. 1 from the catch tank and set it aside.
    Fig 1: Removing Evaporative Hose No 1 From Catch Tank
    G11427370Courtesy of MAZDA MOTORS CORP.
  5. Pull out the ventilation hose from the air hose and set it aside.
    Fig 2: Removing Ventilation Hose From Air Hose
    G09074575Courtesy of MAZDA MOTORS CORP.
  6. Remove the clip and loosen the wiring harness.
    Fig 3: Removing Wiring Harness Clips
    G11427372Courtesy of MAZDA MOTORS CORP.
  7. Disconnect the ECT sensor connector.
  8. Remove the ECT sensor using the SST.
    Fig 4: Removing ECT Sensor Using SST
    G11427373Courtesy of MAZDA MOTORS CORP.
  9. Install in the reverse order of removal.
  10. Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.