Hyundai Motor will in March unveil the first major makeover of its top-selling Tucson sports utility vehicle in six years in a bid to revive growth in key markets like Europe and the United States where SUV sales are now strong. The debut follows what analysts say was a sluggish start last year for the South Korean automaker’s flagship Sonata sedan in the U.S. and Korean markets. Hyundai, which with affiliate Kia Motors is the world’s fifth largest automaker, is also facing stiff competition from Japanese firms as the yen weakens.