Plastic for cooling sucks.

Just replaced the pressurized plastic expansion tank on my grandson's BMW.
To remove it from the rad connection it breaks the plastic thermostat housing. Wholesale parts were over $300.
Later that day, I found another old tank and housing in the trunk, from the previous owner, I presume.

Last week I had to replace the oil cooler/filter seals UNDER the intake manifold of my daughter 3.6 Caravan .
Thank you You-tube ! !

Who designs these things ? ?