424282db_ft_error_codes_troubleshooting__Notes
[Unit] SRS [Error dec/hex] 33/0021 [Parameter dec/hex] 18/12 [BMW Model] E39 528i Touring [Year] 1998 [What is it] Fuse no. 42 in the fuse box on the passenger side [What I’m experiencing] The red airbag alarm turn on on the instrument cluster [Where is the fault] Fuse [How to solve] Replace the fuse [Notes] 
I disconnected the cable by hand to find which error was generating
BMW | P.A. Soft error codes troubleshooting
Notes