This document outlines three scenarios for reducing gas emissions in Indonesia through policies targeting passenger vehicles: 1. Calculating the effect of a LCGC policy to eliminate non-Euro compliant passenger cars by estimating vehicle stock, travel distances, and emission factors. 2. Providing incentives for replacing older vehicles to encourage adoption of newer technologies like hybrids and idle-stop systems. 3. Promoting new vehicle technologies through tax incentives and regulations to improve average fuel economy and reduce oil use and greenhouse gas emissions over time. Estimates are provided through 2030 under different policy approaches and usage scenarios.