Hi. I am new to NICO. I have a 2012 in great shape but I just had a plastic union on the heater hose literally crumble. It is located behind the engine next to the firewall. I have owned a lot of cars and I have never seen any coolant part fail by basically crumbing into pieces. I am wondering if any other Infiniti owners have run into this. It's pretty serious to run out of coolant rapidly in a car so I would not expect a part like that to be in the coolant line. Any thoughts? Is this common in Nissan and Infiniti vehicles?