Good evening all,   So I'm going to change my thermostat, Ive seen on here that i need new thermostat housing?   However i spoke to a couple of my mates and they say that ill be fine to re use my old one, but i dont want to break it and be left without a car for a few days!   Does anyone have a part number or is this the right thing i need; https://www.ebay.co.uk/itm/Coolant-Flange-For-Audi-Seat-Skoda-VW-CA3623/113003094135?fits=Model%3AFabia+I|Cars+Type%3A1.9+TDI+R