Maruti Suzuki India (MSI) earlier resumed its operations at its Manesar plant from 12 May with limited workforce.
In April, the company announced a partnership with AgVa Healthcare, an existing approved manufacturer of ventilators.
Issues such as a severe shortage of labour due to the migrant crisis and broken supply chains are also hampering resumption of manufacturing activity for many sectors.
Total passenger vehicle production stood at 1,40,370 units last month as against 1,47,550 units in February 2019, a decline of 4.87 per cent.
Passenger vehicles' production last month stood at 1,39,084 units as against 1,34,149 units in November 2018, an increase of 3.67 per cent.
Apart from Maruti Suzuki, almost all major automobile makers have reported a double-digit decline in domestic passenger vehicle sales in September.
MSI Chairman R C Bhargava said contracts of the temporary workers were not renewed due to the slowdown.
Passenger vehicles' production last month stood at 1,30,541 units as against 1,75,456 units in July 2018, a decline of 25.6 per cent.
The average inventory for PVs declined to 30-35 days in June from 35-40 days in May adding contrary to industry-wide production cuts, Hyundai Motor increased production by 3 per cent over April-June 2019.