SKU: MMTS-4RUN40-03 | UPC: 811580034282
Mishimoto 2003+ Toyota 4Runner 4.0L Low-Temperature Racing Thermostat
Replace your stock thermostat in 2003-2021 Toyota 4Runner 4.0L 2007-2014 FJ Cruiser and 2005-2008 Tacoma 4.0L with the Mishimoto low-temperature racing thermostat and housing. This direct-fit unit activates at 71C/160F versus OEM 82C/180F to circulate coolant sooner and keep engine temperatures lower. Perfect for hot weather high-power builds or heavy towing it installs with stock-style sealing and carries Mishimoto Lifetime Warranty.
Key Features
- Lower Activation Temperature: Opens at 71C/160F 11C/20F below OEM for faster coolant flow and sustained lower engine operating temperatures
- Direct-Fit Replacement: Matches OEM dimensions for plug-and-play installation on 4.0L 1GR-FE engines without modifications
- CNC Aluminum Housing: Anodized black finish resists corrosion provides reliable seal and enhances cooling system durability
- Performance Cooling: Reduces risk of overheating in demanding conditions like towing track use or modified engines
- Lifetime Warranty: Backed by Mishimoto engineering for long-term reliability on all compatible Toyota models
Product Notes
- Drain coolant before installation to avoid spills and contamination
- Use high-quality coolant compatible with aluminum components for best results
- Ships in protective packaging to prevent damage during transit
Installation Notes
- Professional installation recommended.
- Requires removal of stock thermostat housing and O-ring replacement included
- Compatible with OEM hardware torque to factory specs 22 ft-lbs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003-2021 | Toyota | 4Runner | Limited |
| 2020-2021 | Toyota | 4Runner | Nightshade |
| 2003-2009 | Toyota | 4Runner | Sport |
| 2003-2021 | Toyota | 4Runner | SR5 |
| 2018-2021 | Toyota | 4Runner | SR5 Premium |
| 2010-2016,2021 | Toyota | 4Runner | Trail |
| 2017-2021 | Toyota | 4Runner | TRD Off-Road |
| 2018-2021 | Toyota | 4Runner | TRD Off-Road Premium |
| 2015-2021 | Toyota | 4Runner | TRD Pro |
| 2020-2021 | Toyota | 4Runner | Venture |
| 2007-2014 | Toyota | FJ Cruiser | Base |
| 2008 | Toyota | FJ Cruiser | Trail Teams Special Edition |
| 2007 | Toyota | FJ Cruiser | TRD Special Edition |
| 2005-2008 | Toyota | Tacoma | Base |
| 2005-2008 | Toyota | Tacoma | Pre Runner |
| 2005-2008 | Toyota | Tacoma | X-Runner |
Why Choose Mishimoto?
- Proven leader in automotive cooling solutions for Toyota enthusiasts
- Direct-fit parts tested for real-world performance gains
- Engineered with precision CNC machining for exact OEM compatibility
Frequently Asked Questions
-
Q: Will this fit my 2015 Toyota 4Runner TRD Pro 4.0L?
A: Yes it is a direct replacement for all 2003-2021 4Runner 4.0L V6 models including TRD Pro with 1GR-FE engine -
Q: What material is the thermostat housing?
A: High-quality CNC machined aluminum with black anodized finish for corrosion resistance and heat dissipation -
Q: Does it include warranty and what does it cover?
A: Lifetime Warranty covers defects in materials and workmanship for the original purchaser on thermostat and housing
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Secure box 7.6 x 5.4 x 3.5 inches
- Weight: 14.4 ounces
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