Engine Oil Temperature Sensor: Removal

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Disconnect the ground cable from battery.

Fig 1: Disconnecting Ground Cable From Battery
Courtesy of SUBARU OF AMERICA, INC.
Disconnect the connector (A) from the engine oil temperature sensor, and remove the engine coolant temperature sensor from the chain cover.

Fig 2: Identifying Engine Oil Temperature Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.