Airbag light came on Monday. Ran the codes: left seat belt lock. Ordered a new passenger's side seat belt and the problem went away. Today, the airbag light came on again. Ran the codes: Right seat belt lock.

ghead $70/pop.....
So, moral of the story? replace 'em in pairs, I guess...
Also replaced the lower seat heater element in the driver's seat. It's a wonderful thing....