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For the BMW 7 series (E38) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 model year. Fuse box in engine compartment. fuse box location. Open the hood.
see if there is an inline fuse on the power wire to the radio. It appears to be a known issue. Check out the link
Radio failures occur regularly after all they are prone to shorts , over voltage, surges, incorrect polarity hook up etc. The problem I think is that the radio installer hesitates to work on your unit because he may want approval from bmw to work on it possibly under warranty. Some vehicles state that any unauthorised work voids warranty. Clear the air with the radio teck and find out his problem exactly and if still in doubt take it somewhere else.
Your options: Pull radio and have BMW send in for repairs (usual about 10 day turn around time) OR replace with aftermarket radio. Internal heat sometimes gets to factory BMW radios. You might also check Ebay for a factory replacement, just make sure you get code for new radio.
If you have the BMW tool to pull radio, check wiring plug in rear of radio. Also check grounds (brown wires usually in bundles)
If you don't have tool BMW dealer is the only other option. If it's the actual radio, I'll tell you now BMW will send it in for repair which is a one week turnaround. (I used to work for BMW of NA)
If the radio is displaying code wait, or wait, then the ignition and radio must remain on for 1hour. I would contact a dealer within the USA and provide them with your radio serial number. The serial number can be displayed in the radio by pressing and holding down the "M" button while turning on the ignition.
If you're talking about the Anti-Theft Security code for your radio, I'm fairly sure that only a BMW Dealership would be able to retrieve and reset the radio.
You could also try disconnecting the battery terminals for 10-20 minutes, and see if it resets.
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