Takata Corp (7312.T) said on Wednesday it plans to boost production of parts needed to replace potentially deadly air bag inflators that could spray vehicle occupants with metal shards. Takata shares fell 10.2 percent to 1,353 yen in Tokyo on Wednesday. The air bag inflators have been found to explode with too much force, spraying metal fragment inside cars and forcing automakers to recall more than 53 million vehicles worldwide since 2008.