NGK Mazda 3 2013-2010 Direct Fit 5-Wire Wideband A/F SensorNTK is The Sensor Specialist for import and domestic applications. Established under the NGK family of products, NTK Oxygen Sensors are part of our ongoing commitment to streamline product types and increase coverage. A ceramics company at our core, NTK uses state of the art technology enabling control of the ceramic that is used in our oxygen sensors from raw material to finished product. NTK is the world's largest supplier and manufacturer of