Plan car builds before checkout — guided build planner with parts fitment and cost forecasting

Plan car builds before checkout — guided build planner with parts fitment and cost forecasting targets a $60.0B = 12M DIY and enthusiast households × $5K average annual aftermarket spend (US aftermarket spend focused estimate) total addressable market with medium saturation and a year-over-year growth rate of 8% YoY growth in online automotive aftermarket and ecommerce parts spending (industry reports and e-commerce growth trends, 2023-2025 aggregated).

Key trends driving demand: Online parts shopping continues to convert more DIY and pro-shop purchases from offline to online, creating demand for tools that reduce pre-purchase friction.; Content-driven car builds on social platforms are increasing discovery and prompting more multi-part, higher-ticket purchases that require planning.; Improved AI and computer vision capabilities make automated fitment checks and 3D/AR previews viable for consumer-facing build planning.; Retailers are increasingly focused on reducing returns and increasing average order value, which makes them potential commercial partners for a planning layer..