Interchange Part Number: 2000 2001 2002 2003 2004 Frontier Xterra Nissan 271407Z102,676-58449 902-099 Heater Core Tube 2 Piece Set V6 3.3L Front. Superseded Part Number: 2000 2001 2002 2003 2004 Frontier Xterra Nissan 271407Z102,676-58449 902-099 Heater Core Tube 2 Piece Set V6 3.3L Front.