The actual Spanish verb is "ir" = to go. "Vajar" does not mean anything. The meaning of "no va" is "does not go" or "does not work".
"Pajero" in Spanish was translated by one of my US friends as "Chicken choker"
In Spain the Pajero is called Montero.
There are two Japanese cars called Nissan Moco "mucus" and Laputa "TheWhore", I guess they won't make it to Spain