India adopted the BS VI emission standards in April 2020. While it is mandatory for new vehicles to meet these emission standards, old vehicles are still being used extensively and are a major cause of on-road pollution. For the new emission standards to have the maximum impact, it is imperative that older vehicles, especially diesel trucks and buses, be replaced as quickly as possible. Further, in order that the replacement itself does not lead to environmental problems, proper scrappage policies for junk vehicles have to be adopted and implemented. Thus, this report by CSE aims to address the complex dimensions associated with old vehicles that require immediate policy attention in India.