Complex sentence: The Ford C170 Platform is Ford's compact car automobile platform from the late 1990s used by the Ford Focus through its first generation (superceded by the Ford C1 platform in 2004) and in continued use with the North American Ford Focus.
Split into simpler sentences: The Ford C170 Platform is Ford's compact car automobile platform from the late 1990s. It had been used in the Ford Focus through its first generation (superceded by the Ford C1 platform in 2004) and continues in use with the North American Ford Focus.