Kwiksen 4pcs Upstream and Downstream Oxygen Sensor 234-4162 234-4169 O2 Sensor 1 and Sensor 2 Replacement for 2001 2002 2003 2004 Toyota Sequoia 4.7L 4WD ONLY PART NUMBER: 234-4169 x2, 234-4162 x2 Only fit 4WD Upper and Lower O2 Sensors for 2001-2004 Toyota Sequoia 4.7L 4WD Sensor 1 and Sensor 2 for 2001-2002 Toyota Tundra 4.7L 4WD Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchase.