How do you reset the radio on a 1991 BMW 525I?

Resetting the radio unlocks it and restores it to its normal operating condition. Follow the below procedure to reset the radio.

1) Turn the ignition switch to the "II" position without starting the engine and press the radio power button to turn it on. Wait for "CODE" to appear on the radio display.

2) Press the radio station preset buttons to enter the security code. The radio turns off and resets when the last digit of the code is entered.

3) Turn the radio on. The radio now functions normally.