Mishimoto

  • Jeep JK Cooling Revolution: Our Mishimoto Thermostat Review

    ByMike Izzo

    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.

  • Taming Your Jeep’s Temperature: Mishimoto 180F Thermostat Review

    BySteve

    Taming Your Jeep’s Temperature: Mishimoto 180F Thermostat Review

    When we installed the Mishimoto MMTS-WRA-12V2 Thermostat in our 2016 Wrangler JK, we immediately noticed improved temperature management. This 180°F thermostat replaces the stock 195°F unit, effectively lowering operating temperatures by about 15 degrees-perfect for those challenging off-road adventures where engines work hardest.

    We were impressed by the complete package: a high-quality thermostat, housing, and all necessary gaskets and hardware. Installation was straightforward, requiring basic tools and about an hour of garage time. The aluminum construction feels substantially more robust than the plastic OEM housing.

    After testing in both city driving and some demanding trail runs, we can confirm the cooling benefits are consistent. Our Jeep runs cooler under load, which should translate to better overall engine health and potentially improved performance, especially during hot summer wheeling sessions.