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Old 03-27-2019, 08:11 PM
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mull6 mull6 is offline
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Engine coolant sensor location?

I have a 2014 x3 35i that I purchased a month ago with 35k on it. No problems at first then it wasnít warming up much sometimes the temp gauge wouldnít move and it would run sluggish and sometimes the fan would rev up.

The check engine light came on and I scanned it and it gave me PO 128. Which from what I researched is usually the thermostat but could be the engine coolant sensor. While I was waiting for part and appointment to get new thermostat installed I would drive it around town for close trips if I needed it. Then the check engine light went off and it would warm up properly.

Iím like WTF is going on but Im sure itís going to act up again. So I ordered a sensor through getmybmwparts. I understand that it is located towards the front of the motor below the oil cooler. The one they sent me is not the right size compared to all the sensors that I could see. So either I donít have the right location for the sensor or they sent me the wrong one.

Can someone tell me where the engine coolant sensor is located? I had the thermostat changed yesterday because from what I researched this problem is usually a bad thermostat. Well it is still slow warming up it gets to about 180 degrees which is lower than all my other BMWís that I have had and my current 528 which runs at 215. So Iím sure something is still not working properly. Any advice would be greatly appreciated.
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  #2  
Old 03-27-2019, 10:08 PM
96_Impreza 96_Impreza is offline
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While in there change the water pump, thermostat and rad hoses. I don't know where the coolant sensors are.
"2011 X3 35i, original owner, 118K miles. Engine hot message. Waited for engine to cool and drove it another ten miles to mom & pop BMW shop.
Scan diagnosis: "water pump speed outside of tolerance."
Replaced water pump, new water pump bolts, thermostat kit and antifreeze.
Labor $480.00
Parts $999.97
Shop supplies/hazmat $28.80
Sales tax $118.92
Total $1627.69"
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Old 03-28-2019, 06:44 AM
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mull6 mull6 is offline
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Quote:
Originally Posted by 96_Impreza View Post
While in there change the water pump, thermostat and rad hoses. I don't know where the coolant sensors are.
"2011 X3 35i, original owner, 118K miles. Engine hot message. Waited for engine to cool and drove it another ten miles to mom & pop BMW shop.
Scan diagnosis: "water pump speed outside of tolerance."
Replaced water pump, new water pump bolts, thermostat kit and antifreeze.
Labor $480.00
Parts $999.97
Shop supplies/hazmat $28.80
Sales tax $118.92
Total $1627.69"
I only had the thermostat changed. I am not having any over heating problems, my car is not warming up enough so I donít think the water pump has anything to do with the problem.
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Old 03-28-2019, 06:46 AM
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Doug Huffman Doug Huffman is offline
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WP access is the same, why do it twice?
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Old 03-28-2019, 07:05 AM
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Ridin'Dirty Ridin'Dirty is offline
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Quote:
Originally Posted by mull6 View Post
Can someone tell me where the engine coolant sensor is located? Any advice would be greatly appreciated.
Could this help? Maybe better info could be had by visiting that site, entering the last seven of the cars VIN and searching for "coolant level sensor":
https://www.newtis.info/tisv2/a/en/f...-unit/EUph45sU

https://www.newtis.info/tisv2/a/en/f...t+level+sensor
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Old 03-28-2019, 07:33 AM
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mull6 mull6 is offline
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Quote:
Originally Posted by Doug Huffman View Post
WP access is the same, why do it twice?
Yes it is in the same location. But the engine is not warming up it's not overheating. Why would I pay for a new water pump if I don't need one? I think that a bad water pump would cause over heating problems not problems with engine running too cold. The vehicle is a 2014 with only 35k on it.

Last edited by mull6; 03-28-2019 at 09:30 AM.
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Old 04-05-2019, 07:58 PM
Jsanchez5485 Jsanchez5485 is offline
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It's in the...

Hey just recently changed my04 x3's upper and lower thermostat housing/radiator hoses and if it's the"antifreeze temp" sensor you are talking about, its located in the lower radiator hose. Pop's out pretty easily.. getting to the hose itself may be a little pain we ended up removing the fan for easier access
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Old 04-08-2019, 11:49 AM
MetaX MetaX is offline
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Also keep in mind that the temperature shown in the dashboard is the oil temp, not the coolant temp. Takes a bit longer for the oil temp to hit nominal operating temperature.
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