Plug-and-Play kit installs in minutes with NO wires to cut or splice. Plug-in wire harness included in this kit. Its a known fact that additives in high octane fuel will damage your O2 sensor and affect driveability in short order. Our heated O2 sensor kit prevents deposits from sticking by "burning off" deposits, making the sensor live a longer life. Additionally, a heated O2 sensor helps cut emissions by becoming active faster than a non-heated unit, getting your engine into "closed-loop" sooner. Kit includes our NTK four-wire sensor.