This document outlines 3 scenarios for reducing gas emissions from passenger cars in Indonesia through 2030. Scenario 1 calculates the effect of implementing a LCGC policy to eliminate non-Euro passenger cars. Scenario 2 proposes an incentive program for replacing old cars. Scenario 3 examines introducing new vehicle technologies. Key data on the current vehicle stock, emissions factors, and kilometer traveled is from Gaikindo and BPS and is used to estimate emissions under the maximum, average, and minimum kilometer scenarios with and without the LCGC policy through 2030.