1. airbag problem: creaking sound may be caused by friction or wear of internal parts of airbag. This may require inspection and replacement of the airbag module.
2. Materials used: Some automobile manufacturers use specific materials in the production of airbags, which may cause rubbing sound. Although this sound may be normal, if you feel abnormal, please consult your local car maintenance expert.
3. Other components: The airbag system is interrelated with other components of the vehicle, such as the steering wheel and dashboard. Looseness or wear between them may also lead to creaking sound.
In view of your specific situation, I suggest that you contact an experienced automobile maintenance technician as soon as possible or send the vehicle to a local automobile repair shop for inspection and maintenance. They can examine the vehicle carefully, determine the root of the problem and provide the correct solution. Please remember that it is very important to repair the problems involving major safety equipment, such as airbags.