how to reset side airbag indicator

Hello, You must have a code reader or scan tool with the appropriate access to read and clear codes for the SRS system. They are available all over, not very expensive, but unless you know the issue is resolved or non-existent, it will be right back on when you cycle the ignition. I recommend scanning for codes and addressing the issue, that's the only way the system will become active once again. Keep in mind that the airbags may not work when there is a fault in the SRS system.