Other firms such as Tata Motors, Renault, Nissan and Volkswagen, however, reported increase in their Indian sales in December.
Hyundai Motor India Ltd (HMIL) said its domestic sales in December were at 40,057 units as against 41,861 units in the same month previous years, down 4.3 per cent.
HMIL Senior Vice-President, Sales and Marketing, Rakesh Srivastava had stated that demonetisation impacted consumer sentiment creating a challenge and walk-ins at showrooms were down by around 40 per cent while overall retail sales were down by 24-25 per cent immediately after the note ban.
Mahindra & Mahindra's sales in the domestic market were down 1.5 per cent to 34,310 units last month as compared to 34,839 in the year-ago period.
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"The auto industry continues to go through challenging times, grappling with the short-term effects of demonetisation as well as reduced and postponed purchase decisions. However, we believe there will be a gradual pick-up in demand starting next few months," M&M Chief Executive (auto division) Pravin Shah said in a statement.
"As we move in 2017, the industry does face some short-term headwinds given the uncertainty regarding the impact of demonetisation and GST, while the medium to long term outlook continues to be positive," Ford India Executive Director (Marketing, Sales & Service) Anurag Mehrotra said.
Hinduja Group flagship company Ashok Leyland reported a 12 per cent decline in total sales at 10,731 units in December 2016. The company had sold 12,154 units in December 2015.
Some companies, however, managed to increase their sales in December.
Tata Motors reported 35 per cent increase in its domestic passenger vehicles sales at 10,827 units last month as compared to 8,069 units sold in December 2015, Tata Motors said.
However, Tata Motors' combined sales of commercial and
passenger vehicles increased by just 1 per cent to 35,825 units in December over 35,416 units a year ago.
German auto major Volkswagen reported a 68.72 per cent increase in sales in India at 4,348 units last month as compared with 2,577 units in December 2015.
Nissan Motor India also reported a 21 per cent increase in domestic sales in December 2016 at 3,711 units as against 3,065 units sold the same month a year ago.
Commenting on the sales performance, Nissan Motor India Managing Director Arun Malhotra said: "Nissan India achieved healthy sales in December by posting 21 per cent year-on-year growth despite the challenges of the demonetisation issue. This strong performance came on the back of continued success of Datsun redi-GO and the great customer response to the redi-GO SPORT."
The company's sales of motorcycles in the domestic market dipped by 11 per cent at 1,06,665 units as against 1,20,322 units in the year-ago month.
India Yamaha Motor reported a 28 per cent increase in domestic sales to 49,775 units in December.
Royal Enfield had reported 41 per cent increase in its domestic sales at 56,316 units in December as against 40,037 units in the same month previous year.