Toyota 3RZ engine was first introduced by Toyota in 1995 and came in Toyota trucks & vans till 2004. 1995 & 1996 model was the distributor kind and 1997 up were with coil pack.
It came in Toyota Tacoma from 1995-2004, Toyota T100 from 1994-1998, Toyota 4Runner from 1996-2000. In Japan it came in Toyota Granvia from 1995-2002, Toyota Hilux & Toyota Hiace van from 1995-2004. This engine generally had sludge build up problem, that is what most people complain of on forums. This is getting very difficult to find. The best option would be to buy a remanufactured one instead of a used Toyota 4Runner engine or Toyota Tacoma Engine.