Factual error: In the film, the train is hauled by diesel locomotives on a single track not electrified line. Since early 2000 the Trans-Siberian is double-track and fully electrified.
Factual error: During the opening credits. An LCD screen is shown with lat/long coordinates. The movie takes place in the Persian Gulf. The coordinates are in the vicinity of Oceanside, CA.
Factual error: When Ami and Miki are driving nails into the henchman's face to make him talk, it is very clear that the depth of the nails would have killed him, as they would have penetrated deep into his brain. Obviously done for stylistic effect, but a mistake nonetheless.