Can you get a replacement airbag for an old car (and has it been sitting on a shelf for 15 years anyway?)?
The issue causing the airbag recall is related to the amount of desicant mixed within the amonium nitrate propellant and the environment the airbag assembly is within.
Supposedly, if you have high humidity and high and low temps during a 24hour period, then mositure gets into the airbag assembly and over time enough moisture gets in that the desicant can’t cope. The propellant is thus impacted in a way that cause unexpected changes in chemistry that result in a higher than designed for pressure when ignited which ruptures the container causing bits of metal to be flung around. End result is similar to a grenade going off.
The important thing to note, which seems to have been glossed over by the regulators, is that it doesn’t matter if the bag is in a car or on the shelf, unless the air bag is specially packed in sealed plastic bag with extra desicant to protect it.
If moisture can get to the airbag assembly, whether in a car or on a shelf, with the passage of time it becomes dangerous.
I’d be wary of airbag assemblies that have been sitting on a shelf for many years.
Only safe airbag is one that is just been manufactured and as yet it is undetermined is there is a specific life before it must be replaced with a newly manufactured unit. And NTSB is yet to determine if ammonia nitrate is even a safe propellant to be used in airbags
It’s a mess