Your car wouldn’t happen to be a Volvo would it?
The bio-oil plasticizers also migrate out more quickly in thermal cycling than the old dead dinosaurs approach. Hilariously, when I asked my mechanic about getting an M5, he laughed and explained that the radiator components are known to turn brittle and crack after 5-6 years because of this.
(I don't envy automotive folks. The stuff they have to deal with is next level.)
Ugly AF but artisanal and robust.
( Just avoid the original third gen versions from late 1980s (?) that offshored the assembly )
2012 Bus configuration: https://www.youtube.com/watch?v=fchq6F-gKkQ