CAFE-III Norms – Balancing Fuel Efficiency, Emission Reduction and Technological Innovation

CAFE III Norms Latest News

• The Ministry of Power notified the third phase of the Corporate Average Fuel Economy (CAFE-III) norms. 
• The regulations will be implemented from April 1, 2027, to March 31, 2032, requiring automobile manufacturers to progressively improve the fuel efficiency of their passenger vehicle fleets.
• The new framework seeks to reduce fuel consumption and carbon dioxide (CO₂) emissions while providing flexibility through multiple technological pathways. It also resolves the contentious debate over special concessions for small cars.

Understanding CAFE Norms

• Introduced in 2017 under the Energy Conservation Act, 2001, CAFE norms regulate the average fuel consumption and CO₂ emissions of a manufacturer’s entire passenger vehicle fleet.
• Unlike vehicle-specific emission standards, CAFE norms assess the weighted average performance of all eligible vehicles sold by a manufacturer.
• CAFE-II came into effect in 2022, while CAFE-III will remain applicable for five years, covering M1-category passenger vehicles manufactured or imported for sale in India.
• The framework encourages manufacturers to improve fleet-wide fuel efficiency rather than focusing exclusively on individual models.

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Progressively Stricter Fuel Efficiency Targets

• CAFE-III mandates an improvement of approximately 16.7% in fuel efficiency over five years through progressively tightening annual targets.
• The annual fuel-consumption target is calculated using the following formula –
  • Annual average fuel consumption = a × (W − b) + c
  • Where, 
    • W: Weighted average unladen weight of a manufacturer’s eligible vehicles.
    • b: Reference weight, fixed at 1,229 kg.
    • a: Weight adjustment factor.
    • c: Baseline fuel-consumption target.
• The reference weight has increased from 1,082 kg under the existing norms to 1,229 kg under CAFE-III, reflecting changes in the passenger vehicle fleet.
• The baseline fuel-consumption target will decline from 3.996 litres/100 km in 2027–28 to 3.3273 litres/100 km in 2031–32.
• The revised formula also uses a flatter weight adjustment, allowing different targets based on the average weight of manufacturers’ fleets.

Small Cars vs Large Cars – Resolving the Industry Debate

• The treatment of small cars was one of the most contentious aspects of CAFE-III.
• The September 2025 draft proposed an additional relaxation of 3 g CO₂/km for petrol cars weighing below 909 kg.
• This proposal faced opposition from some manufacturers, including Tata Motors and Mahindra & Mahindra (M&M), who argued that it would disproportionately benefit Maruti Suzuki, which dominates the lightweight car segment.
• The final notification has removed the separate 3 g/km concession but revised the weight-adjustment formula to provide relatively favourable targets for lighter vehicles.
• Consequently, a small car’s target, which would have been 54.1 g/km under the earlier draft, has been relaxed to 63.7 g/km under the final framework.
• However, there is no separate regulatory category for cars weighing below 909 kg. The fuel-efficiency target depends on the manufacturer’s overall fleet weight.

Incentives for Electric Vehicles and Alternative Fuels

• CAFE-III introduces a super-credit mechanism to encourage cleaner technologies and diversify India’s automotive energy mix.
• For example, for BEVs and range-extended electric vehicles (REEVs) volume derogation factor is 3. It is 2.5 for plug-in hybrids and strong hybrids running on flex-fuel.
• Under this mechanism, one BEV or REEV is counted as three vehicles when calculating fleet performance.
• Additional carbon-neutrality factors (CNFs) recognise the contribution of alternative fuels. For example, 8% for E20 or higher ethanol-blended petrol vehicles, and 22.3% for flex-fuel ethanol vehicles.
• EVs also benefit from a separate energy-consumption calculation, with electricity consumption converted into petrol-equivalent consumption using a prescribed conversion factor of 0.1028.
• These provisions encourage electrification, hybridisation and the adoption of cleaner fuels.

Flexible Compliance Mechanism

• CAFE-III introduces a credit-debit system to provide manufacturers with greater flexibility.
• Manufacturers exceeding their prescribed efficiency targets earn credits, while those falling short accumulate debits.
• Credits can be carried forward within compliance blocks and traded between manufacturers.
• Manufacturers with outstanding deficits can purchase credits from the Bureau of Energy Efficiency (BEE).
• The buyout price starts at ₹2,500 per g CO₂/km in 2027–28 and increases by ₹500 annually, reaching ₹4,500 in 2031–32.
• The 3+2-year compliance block structure allows manufacturers to balance deficits across three-year and two-year periods instead of meeting every annual target independently.

Incentives for Technological Innovation

• Manufacturers can claim efficiency improvements from specified technologies, including –
  • Start-stop systems and tyre-pressure monitoring.
  • Regenerative braking and efficient transmissions.
  • Motor-generators and efficient alternators.
  • LED lighting and advanced glazing.
  • Electric water pumps and improved air-conditioning systems.
• Each qualifying technology can provide a claimed reduction of 1 g CO₂/km, subject to an overall cap of 9 g CO₂/km. 
• Self-declaration is permitted during the first compliance block, while claims in the second block require validated testing.
• Manufacturers producing or importing fewer than 1,000 eligible vehicles during a reporting period are exempt from specific CAFE targets but must report their actual fleet-average fuel consumption.

Significance and Way Forward

• CAFE-III seeks to achieve multiple objectives – 
  • Environmental sustainability: Reduce vehicular emissions and fossil-fuel consumption.
  • Energy security: Lower dependence on imported petroleum through improved fuel efficiency and alternative energy sources.
  • Technological innovation: Encourage investment in EVs, hybrids, cleaner fuels and energy-efficient vehicle technologies.
  • Regulatory certainty: Provide a predictable framework for long-term investment and product development.
  • Consumer choice: Allow manufacturers to adopt different technological pathways according to market demand and capabilities.
• However, manufacturers must balance compliance costs, technological investments and vehicle affordability, particularly in the price-sensitive small-car segment.

Conclusion

• CAFE-III represents an important step towards decarbonising India’s passenger vehicle sector. It seeks to promote cleaner mobility while accommodating the diverse capabilities of automobile manufacturers. 
• Its success will depend on effective implementation, technological innovation and the affordability of cleaner vehicles.

Source: IE | IE