Orion Motor Tech Air Fuel Ratio Oxygen Sensor Upstream Front For 1999 Toyota Tacoma Tundra 3.4L Manufacturer Part Number: 8946734021, 8946735011, 8946735030 Interchange Part Number: 234-9002, 2349002 Other Part Number: 8946735040, 8946735050, 8946735060, 2349002