The auto major's scrip opened the day on a lower note and further slipped 2.8 per cent to Rs 361.50 on the BSE.
On the NSE, the stock was down 3 per cent to Rs 361.15.
Tata Motors yesterday reported 42.28 per cent decline in its total vehicle sales at 37,852 units in December 2013.
The company had sold 65,582 units in the same month last year.
Total passenger vehicle sales in the domestic market stood at 9,272 units in December, down 34.63 per cent from 14,185 units in the same month previous year.
In the commercial vehicles segment, the company's sales declined by 45.83 per cent to 25,738 units in the domestic market during the month compared to 47,515 units in the corresponding month previous year.
The company's exports declined by 26.79 per cent to 2,842 units last month from 3,882 units in the same month in 2012, it added.