The National Highway Traffic Safety Administration says it is investigating steering problems in about 500,000 Ford cars. The investigation covers 2004 to 2007 Crown Victoria, Grand Marquis and Marauder models. NHTSA says a heat shield in the car can rust, dislodge and cause the steering shaft to jam. It has received five complaints about the issue and knows of one injury. In that case, the steering froze as a driver entered a highway entrance ramp, causing the car to roll over and cause injuries. Earlier, Chrysler said it would recall almost 900,000 SUVs to fix the wiring for vanity mirror lights in sun visors, to prevent short circuits. Some 2011-2014 Jeep Grand Cherokees and Dodge Durangos were affected.Sign up for top Business news direct to your inbox.IN DEPTHFaulty Airbags: More Hondas Affected, Subaru Joins in RecallsNearly Every GM Model Touched by Recalls This YearSubaru Recalls 660,000 Autos for Brake Line Rust - The Associated Press and Reuters