Upgrade the cooling system in your Jeep or Ram 3.6L Pentastar with the Mishimoto Low-Temperature Thermostat with Aluminum Housing, part number MIS MMTS-MOP-18L. Designed for demanding driving conditions, this assembly replaces the failure-prone factory plastic thermostat housing with a durable aluminum unit that helps reduce the risk of cracking, coolant leaks, and overheating. It provides a precise fit and dependable operation for compatible applications, making it a practical improvement for daily driving, towing, off-roading, and hot-weather use.
The thermostat opens at 180°F, approximately 15°F earlier than the factory 195°F thermostat. Earlier coolant flow helps the engine cooling system respond sooner under increased load, supporting lower coolant temperatures and improved thermal control. This design is well suited for vehicles that regularly encounter steep trails, heavy towing, extended highway driving, or elevated ambient temperatures. It also supports efficient warm-up and maintains regulated coolant flow during normal operation.
Built with high-quality wax for consistent actuation, the Mishimoto thermostat is engineered for reliable performance and long service life. The integrated aluminum housing adds strength and durability compared with the original plastic component, while the direct-fit design simplifies installation using compatible factory cooling-system connections. Like other Mishimoto products, this thermostat and housing assembly is backed by the Mishimoto Lifetime Warranty. Verify vehicle and engine compatibility before installation.
Features:
- Application: Designed for compatible Jeep and Ram vehicles equipped with the 3.6L Pentastar engine
- Temperature rating: Opens at 180°F, approximately 15°F lower than the factory thermostat
- Housing construction: Replaces the failure-prone plastic housing with durable aluminum
- Cooling performance: Promotes earlier coolant circulation to help maintain lower operating temperatures
- Heavy-duty use: Suitable for towing, off-roading, hot climates, and other demanding conditions
- Thermostat design: High-quality wax element provides consistent and dependable operation
- Warranty: Backed by the Mishimoto Lifetime Warranty
Fitment:
2016 Dodge Durango Citadel
2016 Dodge Durango Limited
2016 Dodge Durango Special Service
2016 Dodge Durango SXT
2016 Jeep Grand Cherokee 75th Anniversary
2016 Jeep Grand Cherokee Laredo
2016 Jeep Grand Cherokee Limited
2016 Jeep Grand Cherokee Overland
2016 Jeep Grand Cherokee Summit
2017 Dodge Durango Citadel
2017 Dodge Durango GT
2017 Dodge Durango Special Service
2017 Dodge Durango SXT
2017 Jeep Grand Cherokee Laredo
2017 Jeep Grand Cherokee Limited
2017 Jeep Grand Cherokee Overland
2017 Jeep Grand Cherokee Summit
2017 Jeep Grand Cherokee Trailhawk
2018 Dodge Durango Citadel
2018 Dodge Durango GT
2018 Dodge Durango Special Service
2018 Dodge Durango SXT
2018 Dodge Durango SXT Plus
2018 Jeep Grand Cherokee Altitude
2018 Jeep Grand Cherokee High Altitude
2018 Jeep Grand Cherokee Laredo
2018 Jeep Grand Cherokee Limited
2018 Jeep Grand Cherokee Overland
2018 Jeep Grand Cherokee Summit
2018 Jeep Grand Cherokee Trailhawk
2018 Jeep Wrangler Rubicon
2018 Jeep Wrangler Sport
2018 Jeep Wrangler Sport S
2018 Jeep Wrangler Unlimited Moab
2018 Jeep Wrangler Unlimited Rubicon
2018 Jeep Wrangler Unlimited Sahara
2018 Jeep Wrangler Unlimited Sport
2018 Jeep Wrangler Unlimited Sport S
2019 Dodge Durango Citadel
2019 Dodge Durango GT
2019 Dodge Durango Pursuit
2019 Dodge Durango Special Service
2019 Dodge Durango SXT
2019 Dodge Durango SXT Plus
2019 Jeep Grand Cherokee Altitude
2019 Jeep Grand Cherokee High Altitude
2019 Jeep Grand Cherokee Laredo
2019 Jeep Grand Cherokee Limited
2019 Jeep Grand Cherokee Limited X
2019 Jeep Grand Cherokee Overland
2019 Jeep Grand Cherokee Summit
2019 Jeep Grand Cherokee Trailhawk
2019 Jeep Grand Cherokee Upland
2019 Jeep Wrangler Rubicon
2019 Jeep Wrangler Sport
2019 Jeep Wrangler Sport S
2019 Jeep Wrangler Unlimited Moab
2019 Jeep Wrangler Unlimited Rubicon
2019 Jeep Wrangler Unlimited Sahara
2019 Jeep Wrangler Unlimited Sport
2019 Jeep Wrangler Unlimited Sport S
2019 Ram 1500 Big Horn
2019 Ram 1500 Laramie
2019 Ram 1500 Laramie Longhorn
2019 Ram 1500 Limited
2019 Ram 1500 Lone Star
2019 Ram 1500 Rebel
2019 Ram 1500 Tradesman
2020 Dodge Durango Citadel
2020 Dodge Durango GT
2020 Dodge Durango GT Plus
2020 Dodge Durango Pursuit
2020 Dodge Durango Special Service
2020 Dodge Durango SXT
2020 Dodge Durango SXT Plus
2020 Jeep Gladiator Altitude
2020 Jeep Gladiator Launch Edition
2020 Jeep Gladiator Mojave
2020 Jeep Gladiator Overland
2020 Jeep Gladiator Rubicon
2020 Jeep Gladiator Sport
2020 Jeep Gladiator Sport S
2020 Jeep Grand Cherokee Altitude
2020 Jeep Grand Cherokee High Altitude
2020 Jeep Grand Cherokee Laredo
2020 Jeep Grand Cherokee Limited
2020 Jeep Grand Cherokee Limited X
2020 Jeep Grand Cherokee Overland
2020 Jeep Grand Cherokee Summit
2020 Jeep Grand Cherokee Trailhawk
2020 Jeep Grand Cherokee Upland
2020 Jeep Wrangler Rubicon
2020 Jeep Wrangler Sport
2020 Jeep Wrangler Sport S
2020 Jeep Wrangler Unlimited Rubicon
2020 Jeep Wrangler Unlimited Sahara
2020 Jeep Wrangler Unlimited Sport
2020 Jeep Wrangler Unlimited Sport S
2020 Ram 1500 Big Horn
2020 Ram 1500 Laramie
2020 Ram 1500 Laramie Longhorn
2020 Ram 1500 Limited
2020 Ram 1500 Lone Star
2020 Ram 1500 Rebel
2020 Ram 1500 Tradesman
2021 Dodge Durango Citadel
2021 Dodge Durango GT
2021 Dodge Durango GT Plus
2021 Dodge Durango Pursuit
2021 Dodge Durango SXT
2021 Dodge Durango SXT Plus
2021 Jeep Grand Cherokee 80th Anniversary
2021 Jeep Grand Cherokee High Altitude
2021 Jeep Grand Cherokee Laredo E
2021 Jeep Grand Cherokee Laredo X
2021 Jeep Grand Cherokee Limited
2021 Jeep Grand Cherokee Limited X
2021 Jeep Grand Cherokee Overland
2021 Jeep Grand Cherokee Summit
2021 Jeep Grand Cherokee Trailhawk
2021 Jeep Wrangler 80th Anniversary
2021 Jeep Wrangler Freedom
2021 Jeep Wrangler Islander
2021 Jeep Wrangler Rubicon
2021 Jeep Wrangler Sport
2021 Jeep Wrangler Sport S
2021 Jeep Wrangler Unlimited 80th Anniversary
2021 Jeep Wrangler Unlimited Freedom
2021 Jeep Wrangler Unlimited High Altitude
2021 Jeep Wrangler Unlimited Islander
2021 Jeep Wrangler Unlimited Rubicon
2021 Jeep Wrangler Unlimited Sahara
2021 Jeep Wrangler Unlimited Sahara Altitude
2021 Jeep Wrangler Unlimited Sport
2021 Jeep Wrangler Unlimited Sport Altitude
2021 Jeep Wrangler Unlimited Sport S
2021 Jeep Wrangler Unlimited Willys
2021 Jeep Wrangler Unlimited Willys Sport
2021 Jeep Wrangler Willys
2021 Jeep Wrangler Willys Sport
2021 Ram 1500 Big Horn
2021 Ram 1500 HFE
2021 Ram 1500 Laramie
2021 Ram 1500 Limited Longhorn
2021 Ram 1500 Lone Star
2021 Ram 1500 Rebel
2021 Ram 1500 Tradesman
2022 Jeep Gladiator Altitude
2022 Jeep Gladiator High Altitude
2022 Jeep Gladiator Mojave
2022 Jeep Gladiator Overland
2022 Jeep Gladiator Rubicon
2022 Jeep Gladiator Sport
2022 Jeep Gladiator Sport S
2022 Jeep Gladiator Texas Trail
2022 Jeep Gladiator Willys
2022 Jeep Gladiator Willys Sport
2022 Jeep Grand Cherokee WK Laredo E
2022 Jeep Grand Cherokee WK Laredo X
2022 Jeep Grand Cherokee WK Limited
2022 Jeep Wrangler Unlimited High Tide
2022 Ram 1500 Big Horn
2022 Ram 1500 Laramie
2022 Ram 1500 Limited Longhorn
2022 Ram 1500 Lone Star
2022 Ram 1500 Rebel
2022 Ram 1500 Tradesman
2023 Dodge Durango Citadel
2023 Dodge Durango GT
2023 Dodge Durango GT Plus
2023 Dodge Durango GT Premium
2023 Dodge Durango Pursuit
2023 Dodge Durango SXT
2023 Dodge Durango SXT Plus
2023 Jeep Gladiator Freedom
2023 Jeep Gladiator High Altitude
2023 Jeep Gladiator Mojave
2023 Jeep Gladiator Overland
2023 Jeep Gladiator Rubicon
2023 Jeep Gladiator Sport
2023 Jeep Gladiator Sport S
2023 Jeep Gladiator Texas Trail
2023 Jeep Gladiator Willys
2023 Jeep Gladiator Willys Sport
2023 Jeep Wrangler Freedom
2023 Jeep Wrangler Rubicon
2023 Jeep Wrangler Sport
2023 Jeep Wrangler Sport S
2023 Jeep Wrangler Unlimited High Altitude
2023 Jeep Wrangler Unlimited Sahara
2023 Jeep Wrangler Willys
2023 Jeep Wrangler Willys Sport
2023 Ram 1500 Big Horn
2023 Ram 1500 Laramie
2023 Ram 1500 Limited Longhorn
2023 Ram 1500 Lone Star
2023 Ram 1500 Rebel
2023 Ram 1500 Tradesman
2024 Dodge Durango Citadel
2024 Dodge Durango GT
2024 Dodge Durango GT Plus
2024 Dodge Durango GT Premium
2024 Dodge Durango Pursuit
2024 Dodge Durango SXT
2024 Dodge Durango SXT Plus
2024 Jeep Gladiator Mojave
2024 Jeep Gladiator Mojave X
2024 Jeep Gladiator Rubicon
2024 Jeep Gladiator Rubicon X
2024 Jeep Gladiator Sport
2024 Jeep Gladiator Sport S
2024 Jeep Gladiator Texas Trail
2024 Jeep Gladiator Willys
2024 Jeep Wrangler Rubicon
2024 Jeep Wrangler Rubicon X
2024 Jeep Wrangler Sport
2024 Jeep Wrangler Sport S
2024 Jeep Wrangler Unlimited Sahara
2024 Jeep Wrangler Willys
2024 Ram 1500 Big Horn
2024 Ram 1500 Laramie
2024 Ram 1500 Limited Longhorn
2024 Ram 1500 Lone Star
2024 Ram 1500 Rebel
2024 Ram 1500 Tradesman
2025 Dodge Durango GT
2025 Dodge Durango GT Plus
2025 Jeep Gladiator High Tide
2025 Jeep Gladiator Mojave
2025 Jeep Gladiator Mojave X
2025 Jeep Gladiator NightHawk
2025 Jeep Gladiator Rubicon
2025 Jeep Gladiator Rubicon X
2025 Jeep Gladiator Sport
2025 Jeep Gladiator Sport S
2025 Jeep Gladiator Texas Trail
2025 Jeep Gladiator Willys
2025 Jeep Wrangler Rubicon
2025 Jeep Wrangler Rubicon X
2025 Jeep Wrangler Sahara
2025 Jeep Wrangler Sport
2025 Jeep Wrangler Sport S
2025 Jeep Wrangler Willys
2025 Ram 1500 Big Horn
2025 Ram 1500 Lone Star
2025 Ram 1500 Tradesman
2025 Ram 1500 Tradesman HFE
2026 Ram 1500 Big Horn
2026 Ram 1500 Express
2026 Ram 1500 Lone Star
2026 Ram 1500 Tradesman
2026 Ram 1500 Warlock
