Is the Toyota 3.4 a good engine? The Toyota 3.4L V6 engine is known to be one of the most reliable engines on the market. The engine code is 5VZ-FE and it can be found in the 1995-2004 Tacoma, 2000-2004 Tundra, 1995-1998 T-100, and the 1996-2002 4Runner in the United States.Sep 17, 2021