Example:
Installing a universal single wire oxygen sensor
Note: the tip of the new oxygen sensor may be slightly discolored due to the final heat testing.
1. Disconnect the old oxygen sensor electrical connector.
2. Remove the old oxygen sensor from the vehicle.

Caution: The oxygen sensor is located in the exhaust pipe, which reaches high temperature that could result in burn, so make sure taking proper precaution when remove the sensor to prevent injury.

3. Cut the original positive wire so that the total length when spliced is the same or slightly longer than the original oxygen sensor wire.
4. Strip 1/4” of insulation from the end of the cut wire.
5. Slip a piece of the heat shrink tube over the wire.
6. Crimp the terminal to both wires.
7. Slide the heat shrink tube over the terminal. Heat the tube with a heat gun, match, heat blower, or lighter, until it shrinks and seals the terminal.
8. The new oxygen sensor may have a rubber or plastic cap over the threaded area, so remove the cap before installing the oxygen sensor.

Note: The thread of the oxygen sensor is coated with a special anti-seize compound that allows for easy removal. Please do not remove this coat, and also take care not getting any of the anti-seize on the sensor's tip or damage to the sensor may occur.

9. Installing the new oxygen sensor into its location and tighten to the proper torque listed in the service manual for your vehicle.
10. Reconnect the oxygen sensor's electrical connector.
11. Following the procedures outlined in the service manual for your vehicle, clear any codes that may have been set.

Note: When installing two wires, three wires and four wires universal oxygen sensor, please pay attention to the polarity of the wires. Signal vs. Signal, Ground vs. Ground, Heating vs. Heating. The heating wires are interchangeable.