The Chennai-based company sold 12,057 units in September 2016, as against 14,783 units during the same month last year.
Sale of light commercial vehicles, however, grew by 17 per cent to 3,094 in September, from 2,637 units sold during same month of last year.
Medium and hevy commercial vehicle sale last month dipped by 26 per cent to 8,963 units from 12,146 units during the corresponding period a year ago.
Total sales during the last six months ending September 30, 2016 marginally dipped to 64,611 units from 65,535 units sold during same period of last year.
Medium and Heavy Commercial Vehicles sales between April-September 30, 2016 fell by four per cent to 49,373 units from 51,337 units sold during the same period of last year.