Pentius Oxygen Sensors are designed to measure the proportion of oxygen in the exhaust gases. It sends signal to the computer including air and fuel ratio timing in order to bring the engine into the optimum operating range. A properly functioning oxygen sensor will improve fuel economy, increase engine response, and produce lower emission. It is constructed from durable material that is corrosion and abrasion resistant to meet or exceed OE specifications. Pentius supplies OEM based direct fit sensors to help speed up installation and to ensure longevity.