The Japanese automaker said the global recall would cover 2013-2017 including some Nissan Altima, Leaf, Maxima, Murano, Pathfinder, Sentra and Rogue models.
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"This recall will affect approximately 3.5 million Nissan vehicles and approximately 381,000 Infiniti vehicles globally," the company said in a statement, adding that more than 80 percent of them were sold in North America.
It said a fault in the sensor not properly registering when the passenger seat was occupied could lead to failure to deploy the airbag in the event of a collision.
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The firm said it was developing a fix and would notify dealers in late May.
It was not immediately clear if the recall involves auto parts giant Takata, which was hammered by an exploding air bag defect blamed for at least 11 deaths.
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