Method and apparatus are disclosed for biometric authentication for a vehicle without prior registration. An example vehicle include a biometric scanner to generate a biometric token and a body control module. The body control module when the biometric token is authorized, enable san ignition switch. Additionally, when the biometric token is not authorized and an additional source of authorization is received, the body control module (a) tracks usage of the vehicle subsequent to receiving the biometric token, and (b) marks the biometric token as authorized when the usage satisfies a threshold.