|This article is about a/an monster in Hyakujuu Sentai Gaoranger.|
- "I'm Steam Engine Org! You wretched humans are going to be destroyed! (！ !)"
- ―Steam Engine Org face to the Gaorangers.[src]
- "One-horn! You're not getting away! (！ !)"
- ―Steam Engine Org after being enlarged and trying to crush Yabaiba underfoot.[src]
Steam Engine Org (蒸気機関オルグ Jōki Kikan Orugu, 47) is the final Baron Org to appear; he was created near a train station at Sakitomo and was the strongest Org, overpowering the Gaorangers as he withstood their attacks without breaking a sweat. At the last second, Yabaiba attacks Steam Engine Org and holds him for the Hyakujuuken to kill him. Getting the energy he needed, Yabaiba revives Steam Engine Org who wanted to kill him when the Power Animals arrive to fight. However, like before, Steam Engine Org proves too powerful and cripples most of the Power Animals in the process, decimating GaoKing Sword & Shield, GaoDeers, GaoHunter and GaoMuwcle Striker (even after fusing with GaoGiraffe) with ease. After GaoRed summons GaoFalcon, the remaining Power Animals (GaoBison, GaoWolf, and GaoHammerhead) combine with it into GaoIcarus Another Arm and Leg, who succeed in killing Steam Engine Org with the Icarus Breaker.
- Steam Engine Org is the Final Baron Orgs to appear near end of the series. He also is the second locomotive-themed monster in Sentai history after Locomotive Mask (1976).
- Steam Engine Org were designed by character designer Yoshiro Harada.