Advertising bans are increasingly being used as a policy tool to nudge consumers towards healthier and more sustainable products. We study this in the context of households' vehicle choices in France using rich data on sales and advertising at the demographic-group and product level from 2012-2021. We develop a structural model of demand and pricing of vehicles which incorporates the effect of advertising. The model allows heterogeneity in advertising exposure and advertising spillover effects within and across brands. We use the model to assess the environmental impacts of vehicle advertising and compare its efficacy to environmental taxation and subsidy measures.