Question: Which model was made from 2001–2004, with a Torque of n·m (lb·ft) @ 3750, and an Engine code of n42b18 / n46b18?
SQL: SELECT model FROM table_name_72 WHERE years = "2001–2004" AND torque = "n·m (lb·ft) @ 3750" AND engine_code = "n42b18 / n46b18"