For cars; Hyundai Auto Shutdown Circuit Breaker Engine Start-Stop For 2015 Tucson-2018 and 2019 Tucson-2020 Packing: 1 * Cable Start Stop, 1 * Tool 6 Hazards of Unclosed Start And Stop: 1. Frequent engine starting and stopping during traffic jams or at red lights can cause engine wear 2. Frequent starting and stopping may significantly impact the battery and reduce battery life 3. Repeated engine cycling can affect the vehicle's electrical system 4. Spark plug lifespan may be reduced due to frequent engine cycling 5. Increased oil consumption due to higher demands during start-stop cycles raises vehicle operating costs 6. Manual shutdown buttons can be easily damaged; forgetting to disable the system or repeated manual operation may lead to switch wear Basic Function: 1. Protects the engine by automatically disabling the start-stop function after ignition, preventing damage from frequent engine cycling 2. Automatically disables the original start-stop feature when the car is started, eliminating the need for manual intervention