Biometric authentication represents an innovative technology that has been increasingly applied across various sectors. A notable area of recent interest is its application in vehicle ignition systems. This technology serves to prevent unauthorized vehicle access, ensuring that only the authorized driver can initiate the vehicle's operation. Typically, biometric authentication systems employ a combination of physiological and behavioral characteristics to identify the driver, including facial recognition, fingerprint scanning, iris recognition, voice recognition, and gait analysis. This paper seeks to provide a comprehensive overview of biometric authentication systems for vehicle ignition, examining the advantages, disadvantages, and challenges associated with their implementation. Additionally, the paper explores the various biometric modalities available for authentication, the algorithms employed for recognition, and the security considerations of the system. The findings indicate that biometric authentication for vehicle ignition has the potential to enhance vehicle security and deter theft. Nonetheless, certain technical and social challenges must be addressed before this technology can achieve widespread adoption.