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    Regulatory Guide 2026

    IFRS S2 for Automotive in Mexico: 2026 Guide

    IFRS S2 is the climate-specific standard adopted by CNBV as mandatory for all BMV and BIVA issuers starting January 2025, making Mexico the first country in North America to implement IASB's ISSB standards. Companies must report GHG emissions across all three scopes, conduct climate scenario analysis, and disclose how climate change impacts their strategy and financial model. Limited assurance of the report by an external auditor will be required starting with the 2027 reporting cycle.

    Mexican automotive suppliers are the only BMV sector where Scope 3 Cat 11 (product use) is calculable with established methodology — ISO 14040/14044 LCA for automotive components — but requires vehicle useful life mileage data and destination market energy mix (USA, Europe, China) that Nemak must obtain from its OEM clients.

    Why IFRS S2 Applies Differently in Automotive

    CFO and Sustainability Director of BMV-listed Tier 1-2 automotive suppliers

    Companies in this sector:NemakRassiniVitro AutomotrizKUO Automotriz

    Carbon footprint per part/component required by OEMs (GM, Ford, Stellantis) as a contract condition since 2025 — data that Nemak/Rassini must report before the official IFRS S2 deadline

    Aluminum casting process (Scope 1 intensive): multiple furnaces per plant with differentiated consumption — SAP PM captures operating time but not direct gas consumption per heat

    Scope 3 Cat 11 (use of parts in sold vehicles) — fraction of vehicle lifecycle emissions attributable to the manufactured component, methodology under ISSB discussion

    Secondary aluminum alloys (post-consumer recycled) vs. primary aluminum — 95% difference in upstream Scope 3 Cat 1 that significantly affects the total

    Critical IFRS S2 KPIs for Automotive

    Required KPIData SourceDifficulty
    Energy intensity per tonne of cast aluminum (GJ/t)Direct combustion (Scope 1)High 🔴
    GHG per tonne of part produced (tCO2e/t)Electricity bills (Scope 2)High 🔴
    Percentage of recycled aluminum in charge mix (%)Cat 1 - Aluminio primario y aleaciones compradasHigh 🔴
    Foundry waste generation per tonne produced (kg/t)HR / payroll systemMedium 🟡
    Water consumed in cooling per tonne produced (m³/t)ERP / accounting systemMedium 🟡

    Hard-to-Collect Data in Automotive

    Natural gas consumption per foundry furnace disaggregated by shift/heat quality (SCADA systems exist but not connected to ERP)

    Percentage of recycled aluminum per production batch with supplier traceability for Scope 3 Cat 1

    PFC (perfluorocarbon) emissions in primary aluminum production at reduction plants (if applicable)

    That is why manual Excel-based processes will not pass the 2027 assurance. Without automated traceability, an external auditor cannot verify the completeness or accuracy of emissions data.

    Checklist: 8 Steps to Comply with IFRS S2 in Automotive

    1. 1

      Reporting of GHG emissions Scope 1, 2, and 3 (full value chain) in metric tons of CO₂ equivalent

    2. 2

      Climate scenario analysis aligned to TCFD using at least 1.5°C and 2°C as reference pathways

    3. 3

      Identification and quantification of physical risks (chronic and acute) and transition risks

    4. 4

      Disclosure of emissions reduction targets, including net-zero goals with interim milestones

    5. 5

      Description of how climate risks and opportunities affect business model, strategy, and cash flows

    6. 6

      Connect data sources (ERP, meters, suppliers) to a centralized platform

    7. 7

      Review with internal audit team and adjust consolidation perimeter

    8. 8

      Generate report in CNBV/CINIF format ready for external assurance

    How Climatta Automates IFRS S2 for Automotive

    Automated Collection

    Eliminate spreadsheets in Automotive. Climatta connects your systems and automatically collects Energy intensity per tonne of cast aluminum and other critical KPIs.

    Auditor-Grade Traceability

    Every data point has source, date, and owner documented. The 2027 assurance auditor can trace every figure to its origin in your systems.

    IFRS S2 Report Ready

    Generates the report in the exact CNBV format — tables, metrics, and narrative. No last-minute manual reformatting.

    Onboarding in 4 Weeks

    Climatta connects to Automotive systems in 4 weeks. No months-long IT project or external implementation consultant.

    FAQ: IFRS S2 in Automotive

    Yes. Mexican automotive suppliers are the only BMV sector where Scope 3 Cat 11 (product use) is calculable with established methodology — ISO 14040/14044 LCA for automotive components — but requires vehicle useful life mileage data and destination market energy mix (USA, Europe, China) that Nemak must obtain from its OEM clients.

    The first report covers FY2025 and must be submitted in 2026 to CNBV. Aseguramiento limitado requerido desde 2027.

    IFRS S2 requires: Reporting of GHG emissions Scope 1, 2, and 3 (full value chain) in metric tons of CO₂ equivalent; Climate scenario analysis aligned to TCFD using at least 1.5°C and 2°C as reference pathways; Identification and quantification of physical risks (chronic and acute) and transition risks. For Automotive, the most critical are: Energy intensity per tonne of cast aluminum (GJ/t), GHG per tonne of part produced (tCO2e/t), Percentage of recycled aluminum in charge mix (%).

    Issuers that fail to submit the IFRS S2 report to CNBV in 2026 face formal observations, potential suspension of stock exchange operations, and reputational damage with ESG investors. Aseguramiento limitado requerido desde 2027.

    With Climatta, typical onboarding for Automotive takes 4–8 weeks: 2 weeks connecting to existing systems, 2 weeks validating historical data, and 2–4 weeks generating the pilot report in CNBV format.

    Ready to comply with IFRS S2 in Automotive?

    Climatta centralizes all data collection, generates the report in regulatory format, and leaves it ready for 2027 external assurance. No spreadsheets.