Ford Fiesta ST Racing Thermostat, 2014+
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Keep your Fiesta running cool with the Mishimoto low-temperature Fiesta ST thermostat. Optimal engine temperatures are imperative to achieving peak performance. This Fiesta ST thermostat activates at 160°F vs. the stock 207°F, allowing the coolant to flow through the engine earlier. When you’re out hot lapping at the track, a lower temperature thermostat will be beneficial in keeping engine temps down. When paired with the Mishimoto Fiesta ST Aluminum Radiator, your Fiesta will maximize cooling efficiency. This Fiesta thermostat, like all our Fiesta ST parts, includes the unparalleled Mishimoto Lifetime Warranty.
Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.
For our complete warranty policy, please click here.
The installation of this thermostat requires the use of the Motorcraft RH-223 housing. The stock thermostat must be removed and the Mishimoto thermostat installed in its place.
OEM Activation Temp C
OEM Activation Temp F
(1) Mishimoto Thermostat(1) Spring Plate(1) Spring(2) Rubber O-RingsMishimoto Lifetime Warranty
2014+ Ford Fiesta ST
Mishimoto Activation Temp (Fahrenheit)
Mishimoto Activation Temp (Celsius)
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