The upcoming Saab 9-4X BioPower crossover has been caught out testing again. The 9-4X is expected to debut in production form later in 2009 as the current Trailblazer based 9-7X fades into history. From what we've seen so far the 9-4X will go into production virtually unchanged from the concept version that we saw in Detroit in January. The 9-4X and the new Provoq based Cadillac SRX will ride on a common architecture. The Saab will likely be powered by a choice of turbocharged engines. The concept used a direct injected and turbocharged 2.0L four cylinder optimized for operation on ethanol and generating 245 hp. The turbocharged 2.8L V6 from the Turbo-X sedan may also make an appearance. From these spy photos the interior looks to be carried over virtually intact from the concept.