2005 Z4 2.5. 70K miles. Winter car in Florida. Last spring I was was told by an indy that my coolant expansion tank was leaking. I went back to Maine and garaged the car. After I got back to Florida I checked the coolant regularly and did not see it going down. A few days ago there was a lot...

Here are the lessons I learned while changing my Expansion Tank (08 X3/E83) Global Imports Atlanta takes returns on unused parts - Level Sensor, Cap, Transmission Thermostat. Buy everything and return what you don't need/break Lower Hose can be difficult to re-seat: Give it several good tugs...

There is one wire that splits into two wires and connects to the little plastic housing connecter that plugs into the radiator level sensor for the expansion tank on the bottom. Normally there is some kind of wire casing but in this instance there is not since the car is used. I'm guessing...

I bought the wrong stuff for my E39 from ECS Tuning, but didn't realize it until it was too late to return it. I have the auxiliary fan switch, coolant expansion tank, radiator hoses, thermostat and housing, and a radiator cap. Make me a reasonable offer. These items fit 99+ E39 models. I still...

So, my car overheated yesterday and I checked my expansion tank/reservoir and noticed the coolant low. The closest dealership is over an hour away. I poked around the 'fest for a while and everyone keeps saying, "only use BMW OEM coolant!" Why? What is so special about it. I decided to look it...

Oh dear expansion tank why have you forsaken me? I take you home from the imports' store so happy and clean, only 6 months ago you are joined by many new friends. A shiny new pump, from the pelican, wise A big, wide radiator, sturdy, yet lithe plus many other little friends, all happy throngs...