The National Highway Traffic Safety Administration (NHTSA) is intensifying their investigating into power steering problems in some 2004-2007 Saturn Ion vehicles after receiving over 4,300 complaints. Sixteen of these complaints said that the electronic power steering (EPS) warning lamp illuminated before or during the loss of steering assist and the increased steering effort contributed to a crash. NHTSA said they have upgraded the preliminary inquiry to an engineering analysis so they could further assess the frequency, scope and safety consequences of a sudden loss of steering assist in the subject vehicles.

The EPS system is the same as the on used in the 2010 Chevrolet Cobalt and 2010 Pontiac G5 vehicles. In March of 2010, GM recalled over one million of these vehicle to correct a defect with the EPS assist motor. The problem was described as a buildup of brush debris mixed with oily material on the EPS electric motor armature which causes the motor to stop functioning.