Bought 2014 Chevy Spark used, with airbag light + code 95 on the dash. Took it to Chevy dealership, they told me 3 airbags were missing. They told me the Spark's airbag system runs in a sequence and if 1 or more components are missing or dysfunctional, none of the airbags will work or deploy. Is this true? They want to charge me $7,500 to do the repairs.