What is the importance of Sani's Wrangler in the novel, Me (Moth)?

Over the course of Moth and Sani's road trip, they spend most of their time in Sani's Jeep. The car offers them a temporary sense of home, and a newfound sense of freedom and autonomy. The Wrangler is also the setting in which Moth and Sani learn more about one another and develop their friendship.