Today I noticed the engine temp rising a bit. [Solved]

[oldskewel]

Originally Posted by andrewwynn

Reservoir full and low coolant warning indicates a problem with the sensor

Agreed. That's another problem you should get figured out. Probably pretty easy. There is a little electrical connector at the bottom of the tank (bottom, rear, driver's side) with two thin wires going to it. It could be that leaked coolant residue is interfering with the connection there at the plug/socket. First thing to do is to unplug, clean, etc.

And of course, if the sensor is saying one thing and the floating rod is saying another, believe the floating rod.

If the problem is not at the connection, that magnetic float sensor has been known to be flaky (or even non-existent) for some non-BMW brands.

BTW, if you do end up having an issue with your sensor (i.e., not the connector, your tank is good, etc.), this thread has a ton of info on it. Pics of it cut open, etc. so you can see what that float looks like, the connector location, etc. After all the mysteries about its workings are discussed, the answer is given (I think) in post #16.
https://xoutpost.com/bmw-sav-forums/...l-message.html

But the sensor problem is separate from the leaking coolant problem - solve them both.

[titodj]

Thank you all!

It was both, the level sensor (that was old)
And the thermostat that was new and failed in less than 3 months
I replaced them, and all seems back to normal !

[oldskewel]

Originally Posted by titodj

Thank you all!

It was both, the level sensor (that was old)
And the thermostat that was new and failed in less than 3 months
I replaced them, and all seems back to normal !

Glad you got things fixed. Thanks for following up. Tough when there is more than one failure to confuse the issue.

What was the brand of the new thermostat that failed? Could you tell exactly how it failed?

[titodj]

Originally Posted by oldskewel

Glad you got things fixed. Thanks for following up. Tough when there is more than one failure to confuse the issue.

What was the brand of the new thermostat that failed? Could you tell exactly how it failed?

A couple of months ago, I posted that after a tune up, my mileage was worst, someone suggested me to unlock the hidden menu and check the temperature, so I did.
And the temperature was jumping, not too bad but between 90 and 104.
Anyway, I totally forgot about that.
Then:
It started with random "Low coolant level" warnings, that would come and go. (That was obviously the sensor)

But pretty soon after that I saw the temperature gauge go up (at around 1 o'clock) and then back down ant 12.

That's when i started this thread, and while I was trying to decide what to look at, I remember that someone had mentioned on my other thread, that, that variation was not right on the thermostat.
I'm not sure what the brand was, but had good Amazon reviews, the only noticeable difference was that the connector had a different orientation.

So I decided to get a new one from ebay (following a link that someone posted on this thread), and voila !!

[andrewwynn]

Now just need to fix the programming of the idiot temp dial.


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[titodj]

Originally Posted by andrewwynn

Now just need to fix the programming of the idiot temp dial.

How do I do that?
Seems to be working fine.

[FRod1981]

"fine" as in normal is basically a 3 position dummy dial. its either cold normal or hot. Hes referring to re-programming it so the hot and cold portions are more accurate. I want to do this also. https://xoutpost.com/1121333-post23.html

[andrewwynn]

That's exactly the problem. It always seems to be working fine. There is about a 40° range sheet it points to noon


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[titodj]

Oh, thank you both !!!


I'll Read that and try to do the programing !
That needs to be done for sure !