2012 Hyundai Accent Oxygen Sensor Replacement

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The sensor can now be unthreaded by hand.
When installing the new O2 sensor, if you feel extreme resistance, STOP. It means it is cross threaded. It should easily thread in by hand.
Use the 7/8" (22 mm) socket to tighten the sensor firmly so it doesn't loosen from vibration.
The last picture is what the whole sensor looks like out in the open.

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