Exclusive: GM says recalled cars safe, but has not tested for knee-bump danger
April 17, 2014 at 17:27 PM EDT
WASHINGTON (Reuters) - General Motors says that cars being recalled because of faulty ignition switches can be driven safely before repairs, based on more than 80 tests, but the automaker has not addressed a problem long known to potentially shut off the engine: a simple bump from a driver's knee.