Mishimoto Racing Thermostat

1999–2013 Jeep Grand Cherokee, Dodge Dakota, Dodge Durango, Dodge Ram 1500 3.7L/4.7L PowerTech

Part #: MMTS-JGC-99L

Overview

The Mishimoto Racing Thermostat Low Temp 180°F is a precision-engineered cooling component designed specifically for Jeep and Dodge vehicles equipped with 3.7L and 4.7L PowerTech engines from 1999 to 2013. By opening at a lower temperature of 180°F (82°C) compared to the factory standard of 195°F (90.5°C), this thermostat allows coolant to circulate earlier, effectively reducing engine operating temperatures. This enhanced cooling efficiency helps prevent heat-related engine stress, promoting improved reliability and longevity.

Ideal for enthusiasts who demand consistent engine performance under daily driving, off-road, or high-demand conditions, the Mishimoto Low Temp Thermostat ensures your engine stays within optimal temperature ranges. Its digital calibration and high-quality wax element guarantee precise and repeatable operation, making it a trusted upgrade for PowerTech V6 and V8 engines.

Key Features

Designed to deliver superior cooling performance and durability, the Mishimoto Racing Thermostat offers the following key features:

• Opens at 180°F (82°C) for enhanced cooling efficiency over stock thermostats
• Reduces overall engine temperature to minimize heat-induced wear and tear
• Digitally calibrated wax element ensures precise and consistent thermostat operation
• Direct-fit replacement with included gasket for hassle-free installation
• Compatible with 3.7L PowerTech V6 and 4.7L PowerTech V8 engines
• Constructed to withstand demanding driving conditions including off-road and towing
• Improves engine reliability and extends service life by maintaining optimal thermal management
• Backed by Mishimoto’s Lifetime Warranty for long-term peace of mind

Construction & Design

The Mishimoto Low Temp Thermostat is crafted with high-quality materials and precision engineering to ensure durability and reliable performance. Its wax pellet is digitally calibrated to open at the exact temperature, providing consistent coolant flow control. The thermostat housing is designed for a direct fit, matching OEM specifications to guarantee seamless integration without modifications. Included is a premium gasket to ensure a secure, leak-free seal during installation.

Installation & Fitment

This thermostat is a direct replacement for factory units on select Jeep and Dodge models equipped with 3.7L and 4.7L PowerTech engines. Installation is straightforward and requires no special tools or modifications. The included gasket simplifies the process, ensuring a proper seal and preventing coolant leaks. This product fits the following vehicles:

• 1999–2010 Jeep Grand Cherokee 4.7L V8
• 2000–2011 Dodge Dakota 4.7L V8
• 2000–2009 Dodge Durango 4.7L V8
• 2002–2010 Dodge Ram 1500 3.7L V6
• 2002–2010 Dodge Ram 1500 4.7L V8
• 2005–2011 Dodge Dakota 3.7L V6
• 2005–2010 Jeep Grand Cherokee 3.7L V6
• 2011–2013 Ram 1500 4.7L V8

What's Included

• Mishimoto Low Temp Racing Thermostat (180°F / 82°C opening)
• High-quality installation gasket
• Lifetime Warranty documentation

Ideal For

This thermostat is perfect for Jeep and Dodge owners seeking improved engine cooling performance and reliability. It is especially beneficial for those who frequently tow, drive off-road, or operate their vehicles in hot climates where engine temperatures tend to rise. Daily drivers looking to maintain optimal engine health and extend the lifespan of their PowerTech engines will also find this thermostat an excellent upgrade.

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.