The Supreme Court directed all automobile manufacturers to give details about their unsold BS-III vehicles. Based on the report, the SC will decide whether to allow the manufacturers to sell BS-III vehicles post-March 31, 2017, only after examining the figures. Moreover, the court further summoned Society of Indian Automobile Manufacturers (SIAM) to furnish details of BS-III vehicles manufactured from December 31, 2015, till date.
The new BS-IV (Bharat Stage-IV) emission norms have been mandatory from April 1, 2017, across the country. only those vehicles with the BS-IV complaint will be registered and allowed to ply on roads from April 1, 2017. Manufacturers are currently clearing the existing stock of BS-III products/ vehicle by offering at a heavy discount.
Since 2010: The automotive companies such as passenger vehicles and commercial vehicles have been manufacturing BS-IV engine norms
Implementation of BS-IV norms, The pan-India had been delayed due to non-availability of BS-IV fuel across the country, forcing some categories of four-wheeled vehicles to remain at the BS-III stage till April 1, 2017.
According to SIAM, remaining BS-III stage vehicles are about 75,000 commercial vehicles, 20,000 passenger vehicles, 47,000 three-wheelers, and 7,50,000 two-wheelers till date.