For the first years of the 1990s, arrives the buses of the O-series likes the O 373 RSD (324 units built), the O 374 RSD (72 units built) and the O 400 RSD (61 units built) for the long-distance bus routes and also the OH 1522 (333 units built) and the OH 1526 (98 units built). All made in the factory of González Catán until 1995. In 1994, start the assembly of the OF 1620 with the 200HP diesel engine with 6606 units made and large used in the provinces like Santa Fe, Jujuy and others.