Toyota last fall blamed the episodes on floor mats that entrapped the gas pedals, leading to a massive recall. Then last week Toyota said sticking gas pedals were also causing sudden acceleration by not springing back into idle position, triggering another recall.
On Tuesday, the automaker stopped sales and production of eight models until it could remedy the problem.
Independent auto safety experts have been skeptical of Toyota's explanations, saying floor mats and sticky gas pedals can't fully explain the large number of complaints that have been mounting for the last decade, covering some of the most popular models in the company's lineup, including the Camry.
That argument was given more weight Friday when the manufacturer of the suspect pedals insisted its products had been unfairly blamed.
CTS Corp. of Elkhart, Ind., said in a statement that it had "deep concern that there is widespread confusion and incorrect information" about its products linked to the sudden-acceleration issue.
"The problem of sudden unintended acceleration has been reported to have existed in some Lexus vehicles and Toyota vehicles going back to 1999, when CTS did not even make this product for any customer," the company said.
Toyota began using CTS-made pedals in the 2005 model year.
The automaker also uses pedals supplied by Denso Corp., a Japanese company with North American headquarters in suburban Detroit, but has said those do not appear to be defective.
However, the Times review of federal safety records shows several instances of complaints of stuck pedals on vehicles built in Japan, which Toyota has said are not subject to the recall. For example, one complaint, filed two years ago, told of a 2007 Japanese-built Camry in Maryland with a pedal that "stuck to the floor."
A wide group of national automotive experts say there is strong evidence that a hidden electronic problem must account for at least some, if not most, of the Toyota sudden-acceleration events.
The 19 sudden-acceleration deaths involving Toyota vehicles are more than those that have occurred in vehicles from all other automakers combined, according to figures provided to The Times by NHTSA.