BS7 Emission Norms From April 2029: Full Explainer on Costs, EV Batteries and Old Cars

India Proposes BS7 Emission Norms From April 2029

The Ministry of Road Transport and Highways has released draft Bharat Stage VII emission norms that would apply to new vehicles from April 1, 2029. This is not a routine tightening of tailpipe limits. For the first time, an Indian emission standard reaches beyond the exhaust pipe to regulate brake dust, tyre wear and the long-term health of electric-vehicle batteries. The framework mirrors Europe's Euro 7 rules and has been put out for a 30-day public comment period, which means the dates and details can still move before they are final.

Why now? India's cities carry some of the world's worst air, and road transport is a major contributor. The current BS6 regime, introduced in 2020, cleaned up tailpipes dramatically, but it left two gaps: ultrafine particles small enough to pass deep into the lungs, and non-exhaust pollution from brake pads and tyres, which grows as vehicles get heavier. BS7 closes both, and it arrives as India's vehicle fleet is shifting toward heavier SUVs and electric cars, both of which shed more brake and tyre particles than the small cars they replace.

The BS7 Timeline, Phase by Phase

BS7 rolls out in three phases over six years rather than all at once. New passenger cars are first, from April 2029. Light commercial vehicles and pick-up vans follow a year later, in April 2030. Heavy trucks and buses come under the norms from April 2031. A final phase in April 2035 tightens brake-particle limits across all powertrains and introduces tyre-abrasion rules. The government has not yet published a separate timeline for two-wheelers, which will be notified later.

What Actually Changes for a Petrol or Diesel Car

For the car in your driveway, the headline tailpipe limits barely move. The draft retains the main BS6 ceilings for carbon monoxide, nitrogen oxides and particulate matter. A petrol car may emit up to 1,000 mg of carbon monoxide and 60 mg of nitrogen oxides per kilometre, a diesel car 500 mg and 80 mg respectively, and both face a 4.5 mg per km limit on particulate matter. The real change is in how strictly those limits are policed. The particle-count threshold drops from 23 nanometres to 10 nanometres, so far smaller particles now count. Real-world driving must meet the laboratory limits with no tolerance for nitrogen oxides or particle numbers, tightened from the 1.43 and 1.5 conformity factors allowed under BS6. On-road testing with portable equipment begins in April 2030, and cars must carry on-board monitoring that flags emissions at 2.5 times the limit. The upshot is that a car that looks clean on a lab test but dirty on a real road will no longer pass.

The New Part: Brakes, Tyres and EV Batteries

The genuinely new content is what the rules cover beyond the exhaust. Brake pads and tyres shed particles as they wear, and BS7 would cap them. From April 2031, pure electric cars face a brake-particle limit of 3 mg per km and hybrids, fuel-cell and combustion cars a looser 7 mg per km, converging to a single 3 mg per km limit across all powertrains by 2035. Tyre-abrasion limits arrive the same year, with the actual numbers still to be notified. The draft also introduces battery durability requirements for electric and plug-in hybrid vehicles built from April 2029: a pack must hold at least 75 per cent of its original capacity after five years or 1,00,000 km, and at least 67 per cent after eight years or 1,60,000 km. It adds an environment vehicle passport giving owners access to data on fuel use, battery health and emissions.

How BS7 Compares With Europe's Euro 7

BS7 is deliberately aligned with Euro 7, but India has not simply copied it. The exhaust limits for cars track the European framework closely, including the PN10 particle rule that measures down to 10 nanometres. The phase-in, however, is slower and more staged than Europe's, reflecting India's lower enforcement capacity and the fact that its commercial-vehicle fleet is older and heavier. The draft also folds in battery durability and an environment passport, two features that have proven politically difficult in Europe, and it keeps the door ope ::KEY_NUMBERS:: Cars from | April 2029 Full rollout | April 2035 Battery floor | 75 per cent at 5 years SUV cost impact | about ₹75,000 ::TLDR:: BS7 starts with new passenger cars in April 2029 and phases in through 2035 It regulates brake dust, tyre wear and battery durability for the first time Tailpipe limits are largely retained but measured far more strictly Existing BS6 vehicles are not affected and face no retrofit ::CHART:: type: line title: Proposed BS7 phase-in (start year) labels: Cars,LCV and vans,Trucks and buses values: 2029,2030,2031 source: MoRTH draft notifications, October 2026 ::TIMELINE:: April 2029 | New passenger cars April 2030 | Light commercial vehicles and pick-up vans April 2031 | Heavy trucks and buses April 2035 | Final phase for all categories ::GLOSSARY:: BS7 | Bharat Stage VII, India's next emission standard, aligned with Euro 7 RDE | real driving emissions, tested on the road PN10 | a particle-count rule that measures particles down to 10 nanometres OBM | on-board monitoring of emissions over a vehicle's life ::PULLQUOTE:: For the first time, India's emissions rulebook will judge a car by more than what leaves its exhaust pipe. ::PROS:: Regulates brake and tyre particles for the first time Sets a battery health floor that protects used-EV buyers Existing BS6 cars are unaffected ::CONS:: Could add roughly ₹75,000 to an SUV and far more to a truck Carmakers say the lead time is too short Several limits are still to be notified ::POLL:: Is April 2029 the right start date for BS7? || Yes, clean air cannot wait || No, give carmakers more time || Only if prices do not rise much ::SOURCES:: MoRTH draft notifications, October 2026; The Hindu; Financial Express; The Hindu BusinessLine