Mishimoto Low-Temp Thermostat with Aluminum Housing

2018–2026 Jeep Wrangler, 2018–2026 Jeep Gladiator 3.6L Pentastar

MMTS-MOP-18L

Overview:

The Mishimoto Low-Temp Thermostat with Aluminum Housing is a direct replacement for the stock thermostat assembly on 2018 to 2026 Jeep Wrangler and Gladiator models equipped with the 3.6L Pentastar engine. Designed to enhance cooling system reliability and efficiency, this thermostat features a durable aluminum housing that replaces the factory plastic unit, a common failure point prone to cracking and leaks. By opening at a lower temperature of 82°C (180°F), it allows coolant to circulate earlier than the stock 195°F thermostat, helping to maintain optimal engine temperatures under demanding conditions.

This thermostat is ideal for Jeep enthusiasts who push their vehicles in off-road environments, tow heavy loads, or drive in hot climates. It provides improved thermal management to reduce the risk of overheating, ensuring your engine stays protected and performs consistently during extended adventures.

Key Features:

Engineered for durability and enhanced cooling performance, the Mishimoto Low-Temp Thermostat offers the following benefits:

• Opens at 82°C (180°F), 15°F lower than the factory thermostat for earlier coolant flow
• Aluminum housing replaces the stock plastic unit to eliminate common failure points
• High-quality wax pellet ensures consistent and reliable thermostat operation
• Improves cooling efficiency to help prevent engine overheating in extreme conditions
• Direct fitment for 2018–2026 Jeep Wrangler and Gladiator with 3.6L Pentastar engine
• Designed to withstand off-road vibrations, towing stress, and high ambient temperatures
• Backed by Mishimoto’s Lifetime Warranty for long-term peace of mind

Construction & Design:

The thermostat housing is crafted from robust aluminum, providing superior strength and heat dissipation compared to the factory plastic housing. This upgrade significantly reduces the risk of cracks, leaks, and premature failure that can compromise engine cooling. The thermostat itself uses a premium wax pellet for precise and dependable temperature activation, ensuring coolant begins circulating promptly when the engine reaches 82°C (180°F). The combination of durable materials and precise engineering results in a component built to last through rigorous off-road use and heavy-duty applications.

Installation & Fitment:

This Mishimoto thermostat assembly is designed as a direct bolt-on replacement for the stock thermostat and housing on 2018–2026 Jeep Wrangler and Gladiator models equipped with the 3.6L Pentastar engine. Installation requires no modifications and can be completed with basic hand tools. Replacing the plastic housing with the aluminum unit not only improves durability but also simplifies future maintenance by providing a more robust mounting point for hoses and sensors.

What's Included:

• Mishimoto Low-Temperature Thermostat (82°C / 180°F)
• Aluminum thermostat housing
• Gaskets and seals required for installation

Ideal For:

This thermostat is perfect for Jeep owners who demand reliable cooling performance in challenging environments. Whether you frequently tow trailers, tackle technical off-road trails, or drive in hot climates, the Mishimoto Low-Temp Thermostat helps maintain optimal engine temperatures to prevent overheating and protect your investment. It is especially beneficial for those upgrading their cooling system or replacing a failed plastic thermostat housing.

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.