Carbon neutrality is one of the major task of recent vehicle development, and the CO2 emission from acoustic package manufacturing process has relatively large contribution among the vehicle parts. In times of this new challenge, Lexus new RX which is TOYOTA flagship SUV and requires high NV performance as well as less CO2 emission was released. In this paper, a new technique of acoustic package optimization and acoustic package development for carbon neutrality are introduced to achieve the high NV target and the CO2 emission minimization. Regarding the acoustic package optimization, TOYOTA adopted a newly developed process using Genetic Algorithm (GA) to optimize the thickness and weight of acoustic package. For carbon neutrality, NIHON TOKUSHU TORYO(NITTOKU), TOYOTA, and TOYOTA MOTOR KYUSHU(TMK) with apparel manufacturers and Japanese local government are establishing the recycle scheme of clothing to produce felt material and made felt silencer like dash/floor silencer with mainly using post-consumer recycled felt. Finally, future vision of utilizing further use of recycle material for the car-to-car recycle of acoustic package will be explained.