安全氣囊年限？好問題。幾十年前曾經認為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，幾年前豐田、雷車分別recall過家裏兩車的air bag (高田破產)，主要bag換新了。