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If it states code wait on the radio then you must turn the key to the first click or position in the ignition then allow the vehicle to sit for 1 hour. After 1 hour you will be able to re-enter your code incorrectly up to 3 times before it will state code wait on the radio again.
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The radio comes with a code. Turn on the radio and input the code. Once you have finished putting in the code, the radio will begin to play.
take your car to the BMW dealer they should know the code or you can take the radio out and see the serial number and call a BMW dealer and they can give the code over the phone it has 2 screws and it pops out
if you don't have the code you can take it to a dealer and they can pull the radio and tell you the code. if you know the code simply enter it with the number keys.
Leave the unit on for at least an hour, maybe even an hour and a half. 'Code Wait' should go away and you should then be able to input the correct code; only three tries!
In order to reset the radio in a 1992 BMW 525i, you will need a five digit code from the manufacturer. Once you receive the code, you can check your user manual for the correct sequence to reset the radio.
You will have to go to the dealer to get the reset code and instructions. It will be unique to your particular radio.
Call any BMW dealer with the serial number off the back of the radio and they can look up the radio code to verify you have the correct number.
How to reset security code in 2001 Z3
Call your local BMW dealership with that number.