This document is also available with tracked changes.

Non-binding industry guidance developed jointly by CLEPA and OICA providing internationally harmonised methodology to determine carbon footprint of passenger cars across all life cycle stages. Guidelines define four levels based on data granularity and intended use cases, from generic strategic planning to detailed supply chain reporting. Specifies methodological requirements for material production, parts production and vehicle assembly, use stage, and end-of-life stages; includes requirements for data collection, energy modelling, waste treatment and recycling, and reporting. Applies 100-year global warming potential characterisation factors from IPCC, with dual reporting of carbon footprint including and excluding biogenic CO₂ uptake. Establishes primary data share indicators and chain of custody requirements for supply chain transparency.

Joint OICA and CLEPA presentation of industry-agreed automotive guidelines for life cycle assessment of passenger cars and parts. The guidelines establish a common global methodology for exchanging LCA values across supply chains. Key elements include: functional unit limited to passenger cars with declared units for parts; primary and secondary data approaches; chain of custody covering mass balance and book and claim; energy modelling allowing market-based and location-based approaches; representative vehicle concept for full vehicle LCA reporting; and representative part concept with interpolation for greenhouse gas emissions of declared parts.

Proposal developed under A-LCA Parts and Production (SG3) subgroup.