The automaker redesigned the part and by that June every 2004 model year Sienna off the assembly line came with the new panel. Toyota did not notify tens of thousands of people who had already bought vans with the old panel, however.
It wasn't until U.S. safety officials opened an investigation last year that Toyota acknowledged in a letter to regulators that the part could come loose and "lead to unwanted or sudden acceleration."
In January, nearly six years after discovering the potential hazard, the automaker recalled 26,501 vans made with the old panel.
In a statement to the Los Angeles Times , Toyota said there was no defect in Sienna and that "a safety recall was not deemed necessary" when it discovered the problem in 2003. The company called the replacement part "an additional safety measure."
A peerless reputation for quality and safety helped Toyota become the world's largest automaker. But even as its sales have soared, the company has delayed recalls, kept a tight lid on disclosure of potential problems and attempted to blame human error in cases where owners claimed vehicle defects.
The automaker's handling of safety issues has come under scrutiny in recent months because of allegations of sudden acceleration in Toyota and Lexus vehicles, which has led to some accidents and fatalities.
After Toyota announced its biggest-ever recall this fall to address the sudden acceleration problem, it insisted publicly that no defect existed, drawing a rare public rebuke from the National Highway Traffic Safety Administration, which chastised the automaker for making "inaccurate and misleading statements."
Ex-Toyota lawyer suesOn top of that, a former Toyota lawyer who handled safety litigation has sued the automaker, accusing it of engaging in a "calculated conspiracy to prevent the disclosure of damaging evidence" as part of a scheme to cover up structural shortcomings. As a result, plaintiff attorneys are considering reopening dozens of product liability suits against Toyota.
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