This document summarizes an implementation of a vehicle ventilation system using a NodeMCU microcontroller as an Internet of Things platform. Temperature and rain sensors connected to the microcontroller collect data on vehicle conditions. A mobile application allows users to remotely monitor sensor readings and control vehicle accessories like windows and fans. Test results found that activating the ventilation system reduced average vehicle temperature by up to 12.4 degrees Celsius. The system provides a low-cost solution for remote monitoring of vehicle temperature.