Siemens Automotive's Integrated Starter Generator (ISG) technology is poised to play a leading role in helping Sport Utility Vehicle (SUV) makers reach their stated fuel economy improvement goals of up to 25 percent by 2005."In real-world driving conditions, Siemens ISG-equipped test vehicles have demonstrated significant fuel economy gains," said Kregg Wiggins, Siemens Automotive vice president of Powertrain, North America.