50 votes
I spent a good chunk of change on the Mishimoto thermostat and it got stuck closed within a couple months. Needed the car back right away and all I could get was a dirt cheap MotorRad one. Darn thing has been it in now without issue for a good long while now.
I wanted to upgrade from plastic and got an aluminum Mishimoto thermostat, but i didn’t notice that it opens at 180°. Can i get away with the 180° thermostat, or should i ship it back and re-order a different, higher rated thermostat?
It’s now got an 85°c Mishimoto thermostat. Took it out today and got it up to temp and did multiple 0-85mph pulls. The new thermostat opens at 85°C/185°F. Under load the coolant never registered above 197°F!!!!
Mishimoto has a great thermostat plus it has a lifetime warranty
Get that mishimoto garbage out of there and put a new oem thermostat in there. Unless you really lile pulling the engine out, to replace coolant seals and rusted rotors...
please remove the mishimoto thermostat they fail a lot, it happened to me as well.
Même souci sur 350Z
Le thermostat Mishimoto s'ouvre à 82° au lieu de 68°/ la réponse du constructeur → du moment ou la température reste stable !!!!!!!!!
Je suis énormément déçu de cette réponse surtout au prix et frais de douanes que cela comporte.
Forget about the Mishimoto thermostat. The OEM thermostat is way more reliable and does the job.
I put the mishimoto 160* in hot water to test it out. Lo and behold, wax started seeping out.
I had 2 fail back to back. The first lasted 3 months, a couple thousand miles, the 2nd lasted 5 weeks, also a couple thousand miles. Left me stranded. 275 degree spike followed by coolant puking.
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The brand is registered in USA. Official website: https://www.mishimoto.eu.
In March 2026, PartReview users have a negative opinion of MISHIMOTO thermostat.
PR Score — 32 out of 100, based on 16 reviews and 50 votes. 4 positive reviews, 2 neutral reviews, 10 negative reviews. Average rating — 2.2 (out of 5). Vote balance: 16 up, 34 down.
In the ranking of the best thermostat this part is at position 14, behind Wahler and Mahle , but ahead of MotoRad and OEM Subaru.
Users also evaluated the qualities of MISHIMOTO thermostat:
See which car brands and models owners choose MISHIMOTO thermostat for. Below are car-specific ratings where this part is in the Top-3:
There are 14 comparisons of MISHIMOTO thermostat with other manufacturers on PartReview.
In particular, see which thermostat are better: MISHIMOTO or Motorcraft, MISHIMOTO or OEM Honda, OEM Audi or MISHIMOTO, MOPAR or MISHIMOTO, MISHIMOTO or AISIN .
