Several Uighur fragments have been discovered at Yarkhoto, Qočo, Hami that recount the Buddha’s life, and in particular explicate the teaching of dependent origination. These have been identified by F. W. K. Müller, W. Radloff, J. P. Laut and Peter Zieme as Uighur versions of the Chinese Lalitavistara Sūtra, Aśvaghosa’s Buddacarita and the Tocharian Maitrisimit. This paper gives a detailed study of the Turpan fragment Mainz 131 (T II Y 37), “Buddha’s Biography,” which is held in the Turfansammlung of Berlin-Brandenburgische Akademie der Wissenschaften. This fragment describes the life of the Buddha, specifically concerning the Buddha’s “five great dreams” on the night of his enlightenment. Comparing it with a number of Chinese versions, it is apparent that the order of events and the characters in the Uighur version do not correspond to any of the Chinese versions.