Air Bag Not Deploy problems of the 2014 Chevrolet Volt

We have a 2014 chevy Volt with approximately 88,000 miles. It is out of manufacturers warranty and recently our service airbag light came on. We took to dealer and they are asking us for roughly $850. 00 to replace a passenger seat sensor. They tell us that our airbags will not work in an accident if we do not replace this sensor. I did a search on-line and this seems to be a common problem with the chevy Volt. We purchased this car new and it's still in very good shape besides having this issue. Just wondering if any pressure can be placed on gm to step up here and fix what seems to be a flaw in their manufacturing process or product? after reading how many others have had the same issue and knowing that the airbags will not deploy if involved in a serious accident, it seems there's most certainly a safety issue here. Can anything be done about this?.

Around 7/1/2019, an airbag service light started flashing intermittently. I took the car to the dealer (harbor Chevrolet in long beach) who said that they could not reproduce the problem but said that if I wanted they could replace it for ~$1000. I did not get the work done as I though I could find a better price. The light is now on continuously which means that the passenger side air bag will not deploy. This occurs both when the car is stationary and when it is moving on both city streets and highway. There are currently 52k miles on the car.