The Electric Vehicle PM2.5 Sensor ecosystem spans a defined value chain from upstream component sourcing through midstream system integration to downstream vehicle deployment. Upstream, raw‑material and component suppliers provide semiconductor wafers, housing polymers, and filtration‑grade optics that form the sensor core. Midstream, specialized sensor technology providers develop the detection module, calibration software, and communication interfaces, which are then incorporated by electric‑vehicle OEMs and their tier‑1 partners into cabin‑air management architectures. System integrators bridge the hardware with vehicle electronic control units and telematics platforms, while distributors and channel partners handle regional logistics and sales. Downstream, the end‑user experience is shaped by after‑sales service providers who ensure ongoing calibration, firmware updates, and warranty support. Value is captured primarily at the OEM integration stage and through recurring service contracts, while regulatory compliance creates a mandatory entry point for market participation.