[drunkenup]

You should do something about the fitting off the front of the head going to the thermostat, either replacing the fitting with any of the metal aftermarket pieces, or with a new oem hose that comes with the fitting. Seen it break on all N5x, non turbo too

Plastic radiator drain plugs tend to break so I would have a whole new plug and sleeve ready. The head of the plug on my 330i broke off just breathing on it