安全气囊年限？好问题。几十年前曾经认为10~15年，nowadays not anymore, a “truly”

Life time maintenance free parts.

"The National Highway Traffic Safety Administration (NHTSA) knows of successful deployments of airbags more than 30 years after production, says Jose Ucles, a NHTSA spokesperson."

另外，几年前丰田、雷车分别recall过家里两车的air bag (高田破产)，主要bag换新了。