Nissan's new chief executive Ivan Espinosa faces an uphill task turning around the troubled Japanese automaker with no guarantee it can reverse sliding top-line sales, analysts said, even as he moves to slash costs.

Japanese automaker joins other automakers in pointing to new U.S. tariffs as weighing on their financial results.

Nissan is slashing about 15% of its global work force, or about 20,000 employees, as the Japanese automaker reported a loss Tuesday for the fiscal year that just ended amid slipping vehicle sales in China and other nations,