I installed a Gates 33009S 195 degree after my Hughes install and haven’t had issues.
a Cummins branded 180 thermostat is the bomb diggity.
I have an 06. Had the same issue. Bought a cheap thermostat which turned out to be no good but acted the same as the old thermostat. Then, I changed EVERYTHING else in the coolant system, lol. Switched to Gates, problem solved.
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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This part for Dodge RAM is made around the world. We have reviews for thermostat manufacturers from countries such as: USA, Israel .
In March 2026, the ranking of thermostat for Dodge RAM on PartReview included 3 manufacturers. It is based on 4 reviews and 12 votes.
Last month, PartReview users preferred Gates. 50% of positive votes went to this manufacturer.
In second place: thermostat Cummins — 25%.
Third place: MotoRad with 0% of the votes.
In the overall ranking of thermostat, which aggregates opinions of owners of different car makes and models, these brands hold the following positions:
After seeing which thermostat owners of Dodge RAM prefer, check other popular parts for this car. In March 2026, leaders on PartReview were:
