Did you replace it yourself Krozi??

 

No it was replaced under CPO. But I think it could definitely be a DIY.

 

Nice post Phil.

I have been having the same problem. I have about 55k. I used to get the "low coolant" warning every 2-3 months. Bimmers run hot, especially if you drive hard. That's what I was told. Evaporation, etc.. I didn't really believe it. Had it checked by master tech... no leaks. Now I am putting in fluid every 2 weeks! I have been looking for leaks on the ground... can't find any, but it is going somewhere!

I have an appointment for Tuesday.

 

BTW, many of the BMW coolant hose clamps are one-use only! If you think they can be reused you may find yourself surprised in a disappointing way!

 

It shouldnt be too hard to replace. Check with TIS

 

Had that same issue - turned out to be a hose in my case. Was replaced under warranty, but I saw the bill - it did NOT look like a bill for a hose - more like a radiator. So definitely independent BMW mech or DIY.

 

The hose is the one coming from the engine into the radiator it looks like, any idea if there is a DIY anywhere for what can be safely removed? Tbal what is TIS?

Edit:
The return hose is the problem.

 

on my way home today from work i got low coolant msg on idrive...drove for another 3 miles then i decided to pull over. Opened the hood and there was a very noticeable leak from one of the hoses that was connecting to the radiator right above the fan....located towards the upper right side of the radiator. I didn't feel comfortable driving it, so i had it towed to my mechanic (independent), and by the time the flat bed got there all the coolant had drained...wasn't dripping, more like the hose was taking a piss....color was bright yellow like a highlighter, which i thought it's rare since coolant is bright green. My last coolant related job done was the expansion tank that cracked at about 80K miles. I'm talking to the mechnic tomorrow morning to find out what the damage is, i hope it's not a hefty bill
I'm at 97k miles and on my e39 540 the radiator had to be replaced at 104k miles and that repair set me back about $1K.

 

I had the same problem a couple of months ago, yes i was out of warranty. Mine was the return hose (#3) on the diagram. I went ahead a bought the hose at the dealer, replaced it and the darn thing still leaked. I know i pushed the hose all the way with the clamps in perfect. One thing i didnt buy was the sensor (#4 on diagram) Went to the dealer again got the sensor, replaced it and it stop leaking. Cost me less than $100 for parts and i did the labor. The clamps are built in the hose, just use a flat head to release. It is pretty simple to do. Good luck.

 

Yep thats exactly what I need, thanks for the help guys! How much does the hose run at the dealer?