Low oxygen, high carbon monoxide and carbon dioxide concentrations can typically exist within a vehicle cabin. Such poor air quality may cause drowsiness, fatigue, impairment of judgement, and poor coordination to vehicle occupants. Also, many deaths are caused by motor vehicle exhaust gas suicides from carbon monoxide poisoning. The introduction of an air quality monitor within the vehicle cabin can alarm occupants preventing any adverse health effects. A vehicle cabin air quality monitor was designed and developed. The monitor was tested under various driving conditions and simulated suicide attempts. Alarms are triggered when poor air quality exists within the vehicle cabin.