Bosch + NTK Oxygen Sensor-Air Fuel Ratio Sensor Set (4) For Toyota RAV4 2001-2003 Complete Oxygen Ssensor Set For Toyota Rav4 1- Bosch Air Fuel Ratio Sensor 15217 (Upstream) 1- Bosch Air Fuel Ratio Sensor 13540 2- NTK Oxygen Sensors (Downstream)