Tata Motors has reported a nearly 82% dip in total sales to 25,047 units in the first quarter compared to 1,37,545 units in the same period a year ago. The company's domestic sales fell 82% to 23,845 units, compared to 1,31,879 units last year. Passenger vehicle sales dropped 61% to 14,571 units compared to 36,945 units last year.