The airbag modulus must be replaced, they cannot be reset. Here's an explanation on how they work
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Air bags are pretty dangerous to work with. Make sure the electrical system is disconnected from the battery before touching any of they yellow loomed wires (the power wires for the airbags).
When you're fixing the font end make sure to replace the front airbag sensor with a known good or new one. A faulty/broken airbag sensor can misfire the airbags, or fail to deploy them during a crash.
Sorry I can't help with the removal/installation instructions, just wanted to let you know some of the dangers.
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