Honda is dumping longtime supplier Takata over its deadly airbags.
Honda, one of Takata's biggest customers, also alleged Takata misrepresented and manipulated test data, and has requested the firm hire a third party to conduct an audit of test details given to Honda.
Earlier on Wednesday, U.S. regulators slapped Takata with a massive $70 million fine for selling its botched inflators.
Takata could be hit with an additional $130 million fine if it fails to adhere to safety measures going forward.
Takata could face additional fines from a U.S. Justice Department investigation, and has been involved in multiple private legal actions.