If that's all that triggered the air bag light, any airbag reset tool will do.
INPA is a BMW diagnostic tool. You can purchase the software and cable, and install it on a laptop. Search forum for sources (most buy from the guy in Latvia) You can read and clear any fault code on your SAV with it.

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00 E39 DINAN S1 //M5 (82k miles)
06 E53 DINAN 4.8iS, born 2/18/2006 (126k miles) http://www.xoutpost.com/bmw-sav-foru...s-my-dslr.html
90 Straman Z32 TwinTurbo Convertible, (1 of 44 ever made) 5 speed, 444rwhp/451rwtq
01 360 Novitec Spider F1 (26k miles)