I had to replace the blower motor and stator, I thought it would be a good idea to remove the passenger seat to make my job easier? I did this without disconnecting the battery as it was dead anyway. After putting everything back together the passenger airbag off. service urgent was on. Anyone have advice?

 

You will need to scan the car with a compatible scanner and hopefully just erase any srs codes that are present -

 

As long as there aren't any dangling connection leads, it's probably just a matter of resetting those codes. Same thing happened to me when the wiring underneath the passenger's seat was gently disturbed while retrieving something from under the seat. Apparently, it's a sensitive connection, more on older models.