Drove cross-country, parking brake & airbag lights on. Airbag $1825. Justified?

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Palo Alto dealer said that they replaced the igniter and rechecked but the code persisted and the light was still on. They checked the spiral cable too and ended up ordering a new airbag (2 wks). Also repaired seatbelt. I am amazed that an Audi airbag stops functioning after 5 years. Can I take action? Do I need lawyer?