00 00... Checking horn, headlight flashers and hazard warning system: Horn
WARNING: This page is about a different car, the 2006 BMW X5, 2005 BMW X5, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Check function.
NOTE:
In the case of twin -tone fanfares, make sure that both fanfares are working properly.