The PEPS (Passive Entry Passive Start) Controller is a key component in modern automotive electronics, designed to enhance convenience and security in vehicle access and ignition. It enables drivers to unlock and start their vehicles without physically using a key, by detecting the presence of a key fob through low-frequency signals and high-frequency communication. This system significantly improves user experience by allowing keyless entry and start functions. Integrated within the broader framework of Functional Safety & Security, the PEPS Controller ensures reliable and secure operation, complying with industry standards such as ISO 26262. It works in conjunction with other systems like Door Access and Immobilizer to provide a seamless and safe driving experience. PEPS Controllers are widely used in passenger vehicles, including cars and SUVs, especially in premium and luxury models where convenience and advanced technology are prioritized. They support features such as automatic door unlocking when the driver approaches the vehicle and engine start with the push of a button, enhancing both usability and security. This technology is essential for modern automotive applications, offering a balance between user-friendly design and robust safety measures. Its implementation reflects the ongoing trend toward smarter, more connected vehicles, making it a vital part of the automotive electronics ecosystem.