It was released on July 2nd, 2002.
The early type was based on the first generation of Vitz platform (NBC platform), and the late type was based on the third generation of Vitz platform (B platform). Commercial van model and passenger wagon models were set up for the early type.
It is a model that was developed as the successor of Corolla van & Assista (? Business) wagon/Sprinter van & wagon, using the exclusive design with the ease of use as a van in mind.
Although the sale of the wagon model ended on October 11th, 2013, the van model is still sold today.
The name is a coined word that combines the English words "Pro" and "Box," which means "Box for professionals."