I replaced mine with this one and it has been running perfectly for 6+ months after my original one stuck open. I would not buy anything other than Mopar.
I had a bad thermostat and it's only indication was the temp rising when going up hills under sustained load.
I had a wahler thermostat and my temp range was 93-96
I had this year ago, thermostat was stuck closed, so coolant couldnt go to big circle and into cooler, it went up after 10 minutes of highway driving up to 115° (obd temps) on dash it wasnt that much
I used the genuine part as there is no desire to redo it again too soon.
My 535i with the 740d thermostat sits at 90-95 during normal use, even sat stable at 95c during 40c weather in traffic. When beating on it in the mountains got it up to 99 at like 28c ambient.
Thermostat and temp sensor were just replaced with OE Mahle/Behr. P0128 showed up after car didn’t get up to temp. Heat is slightly affected until reaches operating temp.
Duralast thermostat? They are a piece of shit!
I had the same issues, less than 4 moths, this brand doesn't work.
I did notice before I recently got safety/emission test for plate renewal, i wanted to confirm the I/M readiness had ran, that at idle, the full trims were extremely rich. I'm leaning towards the lower tstat having something to do with that. I have a 195 motorad(blah) that i had just installed before the plenum work. ECT didn't break 178 degrees on a highway cruise at 95+ degrees. That seems to be right at the threshold for the current dtc.
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