This car is prominently displayed at the Thien Mu Pagoda in Hue (see Thien Mu Pagoda). The sign reads: "In this car The Most Venerable Thich Quang Duc went from An Quang Pagoda to the intersection of Phan dinh Phung street and Le van Duyet street on June 11, 1963 in Saigon. As soon as he got out of the car, The Most Venerable sat down in the lotus position and burnt himself to death to protest against the Nago Dinh Diem regimes's policies of discriminating against Buddhists and violating religious freedom".
I remember when this happened, and looked at the car quite differently after reading the sign. [NOTE: The little blue car is clearly visible in the background of Malcolm Brown's famous photograph of Thich Quang Duc's self-immolation].