The Peugeot 2008 is a popular compact crossover SUV that comes equipped with an advanced emergency response system, known as SOS. The SOS system is designed to automatically alert emergency services in the event of a severe accident. The system relies on a dedicated battery to function, and over time, this battery may require replacement to ensure continued operation. This report outlines the procedure and recommendations for replacing the SOS battery in a Peugeot 2008.