Toyota Motor Corp said on Tuesday it is testing air-bag inflators made by Autoliv and Nippon Kayaku Co as possible alternatives to potentially lethal parts supplied by Takata Corp. A spokeswoman for Japan's biggest automaker said the company wanted to ensure the parts were compatible with its vehicles before using them. Reuters had last week reported that Toyota would buy 13 million inflators from Nippon Kayaku to reduce its risk from Takata's airbags, which are at the center of the biggest global vehicle recall for decades.