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Does my vehicle have an Oxygen Sensor?
Most petrol powered passenger vehicles produced after 1980 have at least one oxygen sensor. With the introduction of On-Board Diagnostics II (OBDII) in 1995, all passenger vehicles that complied with this system were required to have at least two oxygen sensors installed.
Most modern passenger vehicles now have between 2 to 8 oxygen sensors. Commercial and 4WD petrol vehicles were recommended to have at least one oxygen sensor from 1980, however this was not enforced due to different levels of exhaust gas emission restrictions. Most modern commercial and 4WD vehicles now have between 2 to 4 oxygen sensors. In recent years, oxygen sensors have also started to find their way into diesel powered vehicles.