Check the listing for details. For Can-Am Commander 1000R 18-20 Othermotive Premium Oxygen Sensor. Condition: New. Listed at 58.43 USD. Othermotive™ Premium Oxygen Sensor by Walker Products®. Walker oxygen sensors are precision made for outstanding performance and manufactured to meet or exceed all original equipment specifications and test requirements. The oxygen sensor is a device which determines the oxygen content of the exhaust gas. Since the amount of oxygen in the exhaust gas is a very good indicator of combustion efficiency, it is also the best place to monitor the air fuel ratio. Walker products, an ISO 9001-2008 / ts16949 certified company, specializes in the manufacturing and distribution of fuel system components and automotive engine management products. Walker is committed to meeting or exceeding OEM or equivalent standards and specifications. This effort is backed by walker's own manufacturing, product management and engineering expertise.