Surely there is some leeway in the amount of time, but there is quite a bit of difference in time (30 min. vs. 90 min.). I could possibly see a 30 min. overture but 'no' more than that. * I am uncertain of the exact process i.e. > 'What needs replacement' - 'Propellant', bag, or inflator. I do not even know if the air bag is considered an inflator or if the terminology is interchangeable. Just too lazy to research online and simply do not care. Again, the tech described in detail all the parts requiring removal. He made specific mention of the heater duct or core or 'something which is intertwined within the dash. Apparently, he viewed the process before advising me. I would only imagine there was some type of schematic or blueprint showing the exact process. I'm really at a loss to comprehend the time interval relating to your vehicle as opposed to mine. I must inquire of what exactly needs replacement (U03). Thank you very much for you assistance. Maybe, at this time I'll look into the service bulletin (recall) to see exactly what needs replacement. The closest direction given me was that the pellets could explode in shards injuring or causing death contingent upon a crash.