The Sossen-7 sublight engine represented a potent type of sublight engine employed within Senator Padmé Amidala's private J-type star skiff throughout the Clone Wars era, beginning in 22 BBY. This specific engine model was a component of the transport that demonstrated the vessel's preparedness for combat, and Amidala continued to rely on Sossen engines in her starship until the conclusion of the conflict, three years later.
As stated by the official Databank on StarWars.com, the Sossen-7 engines were incorporated into the skiff utilized by Amidala in both Star Wars: Episode III Revenge of the Sith and the Star Wars: The Clone Wars film. This instance of retcon posits that these engines were present within the skiff during each of its appearances spanning these two sources.