Toyota Motor Corp. says the gas pedal design in more than 4 million Toyota and Lexus vehicles makes them vulnerable to being trapped open by floor mats, and recently announced a costly recall to fix the problem, the Detroit News reported. But experts are concerned that the drive-by-wire used by automakers is vulnerable to a number of problems, including electronic interference that could cause sudden acceleration. Read more from the Detroit News.RELATED STORY Toyota Rebuked for ‘No Defect’ Claim