Jeep JK Cooling Revolution: Our Mishimoto Thermostat Review
Jeep JK Cooling Revolution: Our Mishimoto Thermostat Review
We recently installed the Mishimoto MMTS-WRA-12E Thermostat in our 2015 Jeep Wrangler JK, and the difference has been remarkable. This 194°F thermostat is specifically designed for 2012-2018 Wrangler models and addresses one of the common issues we’ve experienced with stock components.
The aluminum housing feels substantially more robust than the plastic OEM version, which gave us confidence during installation. We noticed improved temperature regulation almost immediately, especially during our off-road adventures where engine temperatures previously spiked.
What impressed us most was the perfect fitment-no modifications needed. The included gasket and hardware made installation straightforward, taking us under an hour even with careful work.
While the price point is higher than stock replacements, the quality construction and performance improvements justify the investment for any JK owner concerned about cooling system reliability.
