john blackstone is in marina delray, california. and, john, i know two weeks ago, the government said toyota's electronics were not to blame for unintended acceleration. these recalls are actually about floor mats. >> reporter: that's right, katie. this is about a rather low-tech car part, the floor mat, which toyota says can become displaced and potentially jam the gas pedal. now, it's a problem that had already been identified in some models, but this recall shows floor mats are a potential problem in far more cars than previously identified, katie. >> couric: and why didn't toyota catch these problems earlier, john? >> reporter: well, toyota and the government say these recalls come after reviewing some 400,000 pages of toyota records. this is really an extension of the earlier recalls, but now, older models of toyota and lexus are being added. the toyota models involve all suvs, including rav4s, 4-runners and highlanders. under the lexus brand, more than 400,000 vehicles are being recalled for the floor mat and accelerator fixes