PAJU, Gyeonggi Province — Hyundai Motor is banking on the redesigned Tucson to help turn around its weakening sales momentum, putting one of its global best-selling SUVs at the center of its global sales strategy in the second half of the year. The automaker unveiled the fifth-generation Tucson on Friday, six years after the previous model was introduced, positioning the compact SUV alongside the redesigned Avante and the facelifted Grandeur as key models for its swift sales recovery. The launch comes at a difficult time for the carmaker. Its domestic sales plunged 41.1 percent in August from the previous year to its lowest level in 11 years, largely due to production disruptions caused by a prolonged labor strike. With its relatively affordable, high-volume models expected to provide a more immediate boost to its global sales, the launch of the highly sought-after SUV came at the opportune time for the carmaker. Tucson is particularly important because its role extends beyond the Korean market. It is one of Hyundai's major global volume models, giving the company an opportunity to use