Mishimoto low-temperature racing thermostat with stock-style housing for the 2003-2024 Toyota 4Runner 4.0L (1GR-FE, also fits FJ Cruiser, Tacoma and Tundra 4.0L). Its lower 71°C / 160°F activation — versus the 82°C / 180°F factory unit — lets coolant flow through the engine earlier to reduce and maintain lower temperatures, ideal in hot climates, on modified vehicles, or under extreme towing. Easy direct-fit install, backed by the Mishimoto Lifetime Warranty.
| Type | Low-temperature racing thermostat w/ housing |
| Activation Temp | 71°C / 160°F (vs. 82°C / 180°F stock) |
| Engine | 4.0L 1GR-FE V6 |
| Includes | Stock-style housing w/ pre-installed thermostat |
| Part Number | MMTS-4RUN40-03 |
| Warranty | Lifetime |
| Application | 2003-2024 Toyota 4Runner 4.0L (+ FJ Cruiser, Tacoma, Tundra) |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003-2024 | Toyota | 4Runner | SR5 / Limited / TRD Off-Road / TRD Pro / Trail / Sport |
| 2007-2014 | Toyota | FJ Cruiser | Base |
| 2005-2015 | Toyota | Tacoma | Base / Pre Runner / X-Runner / TRD Pro |
| 2005-2014 | Toyota | Tundra | Base / SR / SR5 |
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Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
