Mishimoto MMTS-MOP-18L 180°F Low-Temperature Thermostat with Aluminum Housing for Jeep and Ram 3.6L Pentastar

Don't let a weak thermostat housing cut your adventure short. The Mishimoto Low-Temp Thermostat with Housing for the 2018+ Jeep and Ram 3.6L Pentastar replaces the stock plastic housing with a robust aluminum unit, eliminating a common failure point that can lead to leaks and overheating.--Engine protection starts with temperature control, and this thermostat is designed to keep your Jeep running cool under pressure. By opening at 180F, which is 15 degrees earlier than the factory 195F unit, it allows coolant to circulate through the system sooner, helping to prevent overheating and maintaining lower coolant temperatures. Whether you are crawling over rocks, towing heavy loads, or exploring in hot climates, this thermostat ensures your cooling system stays one step ahead.--Built with high-quality wax for consistent, dependable operation, this thermostat is engineered for performance and longevity. Like all Mishimoto products, it is backed by our Mishimoto Lifetime Warranty for complete peace of mind. Engine coolant thermostat designed to regulate coolant flow and maintain optimal operating temperature. Ensures efficient warm-up, prevents overheating, and supports reliable performance with a precise fit.

• Ideal for demanding conditions such as towing, off-roading, and driving in hot climates
• Opens 15F lower than stock for earlier coolant flow and improved cooling efficiency
• Replaces failure-prone plastic housing with durable aluminum

The Mishimoto MMTS-MOP-18L Low-Temperature Thermostat with Aluminum Housing is designed for 2018 and newer Jeep and Ram vehicles equipped with the 3.6L Pentastar engine. This complete thermostat assembly replaces the failure-prone factory plastic housing with a durable aluminum design, helping reduce the risk of cracking, coolant leaks, and overheating. Its precise fit supports straightforward installation and dependable cooling-system performance.
Opening at 180°F, the thermostat allows coolant to circulate 15 degrees earlier than the standard 195°F thermostat. Earlier coolant flow helps maintain lower operating temperatures and provides added thermal control during demanding use, including towing, off-road driving, extended highway travel, and operation in hot climates. The thermostat still supports efficient engine warm-up while helping manage heat under load.
The Mishimoto MMTS-MOP-18L uses high-quality wax for consistent actuation and reliable long-term operation. Its robust aluminum housing is engineered to withstand the demands of daily driving and performance use, providing a stronger alternative to the original plastic component. Backed by the Mishimoto Lifetime Warranty, this thermostat assembly delivers durable construction and dependable temperature regulation for your 3.6L Pentastar cooling system.

• Designed for 2018 and newer Jeep and Ram 3.6L Pentastar applications


• Opens at 180°F, 15 degrees earlier than the factory thermostat


• Durable aluminum housing replaces the failure-prone plastic design


• Supports reliable cooling during towing, off-roading, and hot-weather driving


• High-quality wax element provides consistent thermostat operation


• Covered by the Mishimoto Lifetime Warranty

Features:

• Designed for 2018 and newer Jeep and Ram vehicles with the 3.6L Pentastar engine

• Opens at 180°F for earlier coolant circulation and improved temperature control

• Durable aluminum housing replaces the factory plastic thermostat housing

• Supports cooling performance during towing, off-road use, and hot-weather driving

• High-quality wax element provides consistent and dependable operation

• Backed by the Mishimoto Lifetime Warranty

Compatible With
2016 Dodge Durango
2016 Jeep Grand Cherokee
2017 Dodge Durango
2017 Jeep Grand Cherokee
2018 Dodge Durango
2018 Jeep Grand Cherokee
2018 Jeep Wrangler
2019 Dodge Durango
2019 Jeep Grand Cherokee
2019 Jeep Wrangler
2019 Ram 1500
2020 Dodge Durango
2020 Jeep Gladiator
2020 Jeep Grand Cherokee
2020 Jeep Wrangler
2020 Ram 1500
2021 Dodge Durango
2021 Jeep Grand Cherokee
2021 Jeep Wrangler
2021 Ram 1500
2022 Jeep Gladiator
2022 Jeep Grand Cherokee WK
2022 Jeep Wrangler
2022 Ram 1500
2023 Dodge Durango
2023 Jeep Gladiator
2023 Jeep Wrangler
2023 Ram 1500
2024 Dodge Durango
2024 Jeep Gladiator
2024 Jeep Wrangler
2024 Ram 1500
2025 Dodge Durango
2025 Jeep Gladiator
2025 Jeep Wrangler
2025 Ram 1500
2026 Ram 1500