some 50,000 models with the 5.7-liter Hemi V8 engine may have a defective timing-chain guide. Affected vehicles include the 2009 to 2012 Chrysler 300 and Dodge Challenger and Charger models built between Aug. 4, 2008, and July 10, 2012. Dealers will replace the timing chain and associated parts free. Campaign: 2014 P01.