Electrical Thermostat housing replacement wiring question

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Apr 28, 2018 | 08:25 PM

Etmil35

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Thermostat housing replacement wiring question

I’m in the process of replacing the thermostat//housing on my 2011 Mini Cooper Countryman All4 S. My car came with the older housing type with just one plug. I had to order the coolant thermostat adapter lead Part Number12518611289This is a two wire setup. The new thermostat has one sensor on the top front and one towards the back on the lower side. Anyone know which of the two wires go to which sensor? They are the exact same plug and came with no directions.

May 2, 2018 | 07:02 AM

MiniToBe

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From: Philadelphia PA

I dont think they are interchangeable. I believe the longer one goes to the temp sensor.

May 2, 2018 | 07:29 AM

Etmil35

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Quote:

Originally Posted by MiniToBe

I dont think they are interchangeable. I believe the longer one goes to the temp sensor.

You are correct. For anyone with a question on this in the future, these plugs have a small fin on them that is unique to each plug that ensures you can’t plug the wrong one into the wrong sensor.

May 2, 2018 | 07:57 AM

contrail

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From: Lafayette, Colo

On my 2012, there was a 4-pin plug for the stat housing and a 4-pin for the map sensor and yes you can get this swapped. It results in more MIL codes, 100,102.

May 2, 2018 | 08:33 AM

Etmil35

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Quote:

Originally Posted by contrail

On my 2012, there was a 4-pin plug for the stat housing and a 4-pin for the map sensor and yes you can get this swapped. It results in more MIL codes, 100,102.

For some you may be able to swap them. For the models that require the coolant adapter lead because of the Tstat housing change, they aren’t interchangeable.

May 6, 2018 | 04:02 AM

CountryS

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Quote:

Originally Posted by Etmil35

I also own a 2011 and notice there is very little heat during the winter season, can I ask why you actually replace your original unit, will you be doing the installation yourself.
Should I be replacing my unit with the part number you included, I read previously that you had to order a separate cable .. please confirm and include the part number of the cable.
Thanks

Oct 7, 2018 | 01:17 PM

uspowers

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With the new thermostat housing PN 11537647751 the 2 x 2pin connecters from adapter PN 12518611289 all electrical connections are accommodated for the thermostat.
On my old Thermostat setup (2012 Countryman ALL 4) there is an 45 Degree aluminum fitting in the large hose to the radiator that has a connector in it.
Do I just leave this connection open with the new setup?
Thank you
Bob

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Oct 7, 2018 | 02:29 PM

MrGrumpy

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From: Washington state

I just did my ‘12 R60 about a week ago. I don’t recall that part right now, but I will look in about an hour when I get back home and try to see what aluminum piece you mean. Can you post a photo of it?

Oct 8, 2018 | 06:16 AM

MiniToBe

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From: Philadelphia PA

Quote:

Originally Posted by uspowers

I remember seeing a setup like that...I guess was exploring the many options to place the thermo sensor...At any rate, I would replace the whole hose to avoid point of failure. leaving it as is with the sensor not wired is ok too as long as everything is coming out the thermostat housing.

Oct 8, 2018 | 01:25 PM

#10

uspowers

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Here's a photo.

I'll abandon it for now and replace the hose next time I work on the cooling system.
Thanks
Bob

Oct 8, 2018 | 01:27 PM

#11

uspowers

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Oct 8, 2018 | 02:46 PM

#12

MrGrumpy

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From: Washington state

Oh...well no wonder I didn’t remember it. My 2012 R60 does not have that metal part there at all. It’s just a curved hose there with no electrical plug there that I can see. Weird.

Oct 10, 2018 | 02:30 PM

#13

uspowers

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Yours must be a late year 2012 and mine early.
Bob

Oct 10, 2018 | 03:55 PM

#14

MrGrumpy

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From: Washington state

Actually the build date is 01/2012, lol. So who knows. It appears that there were several revisions throughout production to several different parts. I recently did a turbo upgrade on another 2012, and found several small differences in part design and placement. Not with the turbo, but especially with some of the plastic parts

Dec 26, 2023 | 09:55 AM

#15

raverett

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I have a 2013 Mini Cooper, and I just finished replacing the thermostat housing. But the original temperature connectors don't fit. So I bought the thermostat adapter leads, but I can't figure out where the 4 prong male connector attaches too. Any help is welcome!!!

Thank you

Jul 29, 2024 | 08:09 PM

#16

6ft2James

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Same Boat

Quote:

Originally Posted by raverett

I am trying to figure out the same thing in my 2012 Cooper Countryman. I'm starting to think you have to just splice the wires. I opened the wiring harness and can't find anything that looks like it would fit the 4 pin plug. If you've found a solution, please let me know.

Thanks