BS-VII clock starts ticking as Centre sets 2029 target for emission norms

The Indian government has proposed the introduction of Bharat Stage-VII (BS-VII) emission norms for passenger vehicles (PVs) starting from April 1, 2029. This initiative aims to address brake and tyre pollution, implement tougher real-world emissions checks, and enhance battery durability under a comprehensive regulatory framework.

The proposal has taken automakers by surprise, with industry executives expressing concerns that the compressed timeline could disrupt product launch schedules and hinder electric vehicle (EV) development. Companies may need to divert engineering and research resources towards compliance with the new standards.

According to a draft notification from the Ministry of Road Transport and Highways (MoRTH) dated October 12, the implementation of these standards will occur in three phases: April 2029, April 2031, and April 2035. The primary focus is on M1-category PVs, which include cars and sport utility vehicles with no more than eight seats in addition to the driver's seat.

Unlike the transition from BS-IV to BS-VI, the proposed BS-VII framework does not lower the principal tailpipe emission limits for PVs. The limits for carbon monoxide, nitrogen oxides (NOx), hydrocarbons, and exhaust particulate matter (PM) remain unchanged:

• NOx limits: 60 mg/km for petrol vehicles, 80 mg/km for diesel vehicles
• PM limit: 4.5 mg/km

The significant changes involve how emissions are tested and monitored throughout a vehicle’s life, alongside new requirements for brake and tyre pollution, EV battery performance, and vehicle data.