Toyota Motor on Wednesday announced it would recall 3.37 million vehicles worldwide over air bag and emissions defects.

The automaker said that welds that connect side curtain air bags could deteriorate over time, causing the devices to inflate without cause. The recall covers Toyota Prius models from 2009 through 2015 and Lexus CT200 models from 2010 through 2015. The total accounts for 1.4 million vehicles, 482,000 of them in the United States, Toyota said in the announcement.

Additionally, 2.87 million vehicles internationally are being recalled for possible cracks in the fuel tank, Toyota said. Some Prius models are affected by both defects, the company said, as are the Auris, Corolla, Zelas, Lucas and Lexus HS250h and CT200h manufactured from 2006 through 2015. About 900,000 Priuses are affected by both defects, which brings the total vehicles recalled to 3.37 million. Most vehicles with fuel-tank issues were sold in Japan and China.

The latest air-bag issues are unrelated to another recall for vehicles from multiple automakers that have Takata air bags, Toyota said. They are made instead by Sweden-based Autoliv, which said in a statement that it is cooperating with Toyota and American and Japanese authorities.

In seven cases, according to Autoliv, air bags partially inflated without a deployment signal in unoccupied parked cars.

As of this week, Toyota said, it was unaware of any injuries or fatalities related to either recall.