I just bought a 1994 bmw. I need a code to access my kenwood kdc-x679 excelon player. The previous owner doesn't know the code,

You can enter a 4-digit security code which must be used when the unit is removed from the vehicle, or the constant power source is disconnected from the unit. When constant power is restored to the unit, the security code must be entered before the unit becomes operational.

If the code is lost or forgotten I am afraid the unit has to go to a Kenwood dealer for re-coding.

You can enter a 4-digit security code which must be used when the unit is removed from the vehicle, or the constant power source is disconnected from the unit. When constant power is restored to the unit, the security code must be entered before the unit becomes operational.
If the code is lost or forgotten I am afraid the unit has to go to a Kenwood dealer for re-coding.