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Discussion Starter #1
Hello,

I own a 2014 X1, s28i with 57K miles. I began receiving an intermittent "Service Engine Soon" light. I took it to a local AAAmco who diagnosed a P0597 code, suggesting I need a thermostat replacement. Wiggling the wires into the thermostat made the code go away. The car heats up fine, so I am wondering do I really need to replace the thermostat, or just the connectors?

Any help would really be appreciated. Is there a way to test the thermostat's integrity?

Thanks,
 

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Northern BMW Fan
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595 Posts
Take a look at the connector points. If you see any kind of dirt / rust / build up then it's the connectors. If they look clean then maybe thermostat.

I would do a thorough check, clear the code, and wait for it to come back (while keeping an eye on the temperature of course).
 

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Sandlapper Chapter
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I thought those models had a recall for the thermostat?
 

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mine at 33000km (20,000 miles)

thermostat played up engine got heated very quickly

took the car in they replaced both pump and thermostat under warranty
 

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Also check the entire harness from the DME to the thermostat, just in case.
 

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Discussion Starter #6
So the SES light came back. I took it to a independent I trust. Now I have a second code, P0014, something to do with the Vanos. I still suspect its the thermostat electric cables, causing other faults.
 

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Northern BMW Fan
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So the SES light came back. I took it to a independent I trust. Now I have a second code, P0014, something to do with the Vanos. I still suspect its the thermostat electric cables, causing other faults.
Did the technician suggest what it could be?
 

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There are 42 different reasons for the P0014 code in ISTA for your car everything from DME to ABS and in between and VANOS is only one of them.
 

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Discussion Starter #10
So we replaced the thermostat. The mechanic thought all the wires and connectors looked fine. He thought the sensor on the thermostat or the unit itself was failing. No codes so far. Fingers crossed they don't come back.
 

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Discussion Starter #11
So we replaced the thermostat. The mechanic thought all the wires and connectors looked fine. He thought the sensor on the thermostat or the unit itself was failing. No codes so far. Fingers crossed they don't come back.
 

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So we replaced the thermostat. The mechanic thought all the wires and connectors looked fine. He thought the sensor on the thermostat or the unit itself was failing. No codes so far. Fingers crossed they don't come back.
Do you know the part number of the new thermostat? As far as I know the thermostat for the N20 (latest revision is 11538635689) is back ordered and there no new one available. I'm waiting since April 23 and the information SA gave me is 5 to 10 weeks for replacement.
 

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took me 5 weeks for part to come

they temporarily put an used one for me to drive till new parts arrive
 
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