Mishimoto MMTS-WRA-12E Thermostat with Housing, Compatible with Wrangler JK 2012-2018, 194F
$23.99
Price: $21.97 - $23.99
(as of Sep 24, 2025 22:54:56 UTC – Details)
Keep temperatures under control in your Jeep with the Mishimoto Jeep Wrangler JK 3.6L Thermostat with Housing. A faulty thermostat can lead to engine overheating and potential internal damage. Protect your ride with the Mishimoto thermostat, featuring an upgraded aluminum housing and bleeder screw for enhanced durability. This thermostat opens at the stock temperature (194 Degrees Fahrenheit), ensuring proper coolant flow as intended by the manufacturer. Designed for reliability and durability, all our thermostats are constructed using high-quality wax for consistent operation.
Upgraded aluminum housing for an improved lifespan and leak prevention
Included metal bleeder screw for tighter seal and easier maintenance
Rigid one piece design for increased durability.
Direct fit for the 2012-2018 Jeep Wrangler JK 3.6L
Utilizes high-quality wax for reliable, repeatable operation
Customers say
Customers find the thermostat’s build quality positive, with one noting it’s the best replacement to OEM. The product functions well, with one customer mentioning their coolant system works more efficiently.
4 reviews for Mishimoto MMTS-WRA-12E Thermostat with Housing, Compatible with Wrangler JK 2012-2018, 194F
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$23.99
Carlos Encarnacion –
Good quality
Itâs very good is work perfect
Peter Tsilimidos –
Best replacement to OEM yet.
Working great compared to the factory assembly. I like the fact it is a 194 temp instead of the 203 standard. Engine only runs a couple degrees cooler but I feel the rest of the coolant system is working more efficiently, and the fan does not have to run as much. I drive about 20k miles a year and in long distance rides of 3 hours or more the jeep does respond better.
Anon –
Best money for thermostat
EVERY JEEP SHOULD USE THIS! Ditch the plastic and get this. 10/10
mixedreef –
Overall, very happy with my purchase.
Application – 2016 Jeep JK on 35ââ tires 3.5â lift, 4:56 gears and winch partially blocking front grill.Problem-Vehicle started to overheat due to the OE radiator leaking from the seal between the aluminum core and side plastic caps. Replaced with Mishimoto full aluminum core radiator and was still not happy with temps as they would reach 210 to 235. I tried swapping out thermostat both oe and aftermarket and no change.Itâs been two days after installing the new Mishimoto 190deg. thermostat and the operating temperature has been between 192 to 217. I first thought that the temperature needle was going to be below the middle mark, but this was not the case as the needle is actually right in the middle during the day.I only a couple days on my vehicle and believe It is too early to give an honest review, but so far I am happy with the performance of this new thermostat.Not too crazy about the bleeding screw as you can only access it with a torx bit and have limited clearance when installed but overall built quality of product is solid aluminum and appears to be very well built.A little bit on the expensive side, but not much difference from OE.Iâm hoping that at the end of the day this will pay for itself by avoiding expensive repair cost due to excessive wear and tear as a result of high engine temps.I am also a little concerned the next time I smog my vehicle as I may have to swap back out to be able to pass CA emissions test. If it continues to perform the way it has been for the last couple of days, I think will be well worth it.I will update my review only if performance starts to decline.Post date 7/30/25