The draft Corporate Average Fuel Consumption (CAFE) Stage-III will drive a sharp escalation in marginal abatement costs for domestic automobile manufacturers, according to an impact analysis by rating agency ICRA.
The upcoming regulatory phase, scheduled to take effect on April 1, 2027, will force OEMs to significantly increase research and development outlays to meet stricter CO2 reduction targets.
ICRA highlights that the updated framework will make regulatory compliance increasingly difficult to achieve through basic internal combustion engine modifications alone. Passenger vehicle manufacturers face a mandate to reduce fleet-average emissions by 16 per cent in the 2028 fiscal year, with the target tightening to nearly 30 per cent by the 2032 fiscal year.
The rating agency has divided compliance risk profiles across the passenger vehicle industry based on powertrain strategies, identifying high-risk archetypes among internal combustion engine-heavy mass-market manufacturers who face the steepest compliance gaps due to a lack of electrification buffers.
Conversely, EV-forward manufacturers have more headroom, allowing them to monetize surplus regulatory credits through pooling mechanisms, while hybrid-reliant and premium manufacturers occupy an intermediate, moderate-risk position. The CAFE-III draft proposes that manufacturers failing to meet fuel efficiency targets can buy compliance credits at a fixed price of Rs 2,500 per gram of CO2 per kilometre, giving EV-focused OEMs an advantage.
To mitigate debits in their annual regulatory passbooks, ICRA notes that manufacturers must exhaust low-cost software and calibration tweaks before transitioning to progressive, hardware-intensive engineering changes. Approved component retrofits will add direct variable costs to vehicle assemblies, ranging from low-rolling-resistance tires costing up to ₹3,000 to advanced 48-volt mild-hybrid systems requiring an estimated ₹40,000 to ₹70,000 per vehicle.
ICRA concludes that while the framework will successfully trigger an aggregate consumer fuel saving potential of roughly ₹38,000 crore, the cost of technology integration will likely result in periodic price hikes, creating sustained affordability hurdles in the price-sensitive entry-level passenger vehicle segments.