My opinion here.
The only matter of concern (or maintenance) with the airbags is the passenger seat sensor pad. I antipicate there will be varying opinions, but I suspect the general consensus is "If it is not broken, then don't fix it" a very hard argument to dispute. BUT, if you want to be proactive, or are disturbing the passenger seat base assembly to restore or replace the leather, that would be a good time to improve the support of the base seat cushion for protection of the seat sensor, as well as improving the comfort of the seat.
Stepping back 7 years , In 2016 I replaced the cloth seats with leather in a 2007 Solstice GXP with 45,000 miles. In that car, the thin wire springs in the passenger seat, cut deeply into the seat base cushion. The seat had sagged from it which surely was not good for the sensor pad. Using clear silicone caulk as an adhesive and support, I glued all the cuts back together, then smeared a layer of caulk on the underside of the cushion to protect it from future cuts.
With that experience in my head...........
Two years ago, I bought my 2007 Sky with 118,000 miles with stiff crusty cracked leather seats. I decided to replace it with brand new aftermarket 100% real leather throughout. Upon disassembly of the passenger seat, the base cushion and airbag sensor pad appeared to be recently replaced. With my experience with the Solstice, I decided to be proactive, so I added two rubber floormats between the wire springs and foam cushion to prevent the wires from cutting the cushion which also improved the support of the cushion and airbag sensor pad. My wife is 125 pounds and sits there often. I don't yet notice any negative effects to what I did, only positives.
Here is my new-looking (must have been replaced shortly before I bought the car) passenger seat base cushion with the airbag sensor pad. Note the delicate nature of the sensor membrane. The orange electrical Kapton/polyimide memberane is embeded throughout the black surface. You can see a little of it that ties electrical connections between black pads and also on the left side to the controller.
At each of the 4 holes, there was evidence the Kapton/polyimide memberane is throughout the black pad.
To improve support for the cushion with the sensor pad, I added a pair of good-fitting floormats.
For the curious, here are the results of my aftermarket real 100% leather. It does not fit as perfect as OEM, but it looks and feels a whole lot better than the tired old seats did.
