Motorad 5416-203 Engine Coolant Thermostat

Motorad UltraStat 5416-203 Thermostat Overview

Motorad UltraStat 5416-203 is an engine coolant thermostat built for direct-fit cooling system service on a wide range of Chrysler, Dodge, Jeep, and Ram applications. It uses heavy-gauge stainless steel construction, a rubber seal, and a 203°F opening temperature to support stable coolant flow in OE-specified systems.

The UltraStat line focuses on durable thermostat construction and controlled temperature regulation. For drivers searching for a 203 degree thermostat for a Dodge Charger, Jeep Grand Cherokee thermostat replacement, or Ram 1500 cooling system repair, this part number 5416-203 is a fitment-based option with broad coverage.

Key Features

• 203°F thermostat temperature for OE-specified cooling system operation
• Heavy-gauge stainless steel construction for corrosion resistance
• Rubber gasket/seal included for installation sealing
• Jiggle pin weep hole for air bleeding during service
• 2.5 in sealing flange outside diameter
• 1.38 in bypass diameter and 0.05 in flange thickness
• Motorad UltraStat design for controlled coolant flow response

Detailed Product Description

Motorad 5416-203 is an engine coolant thermostat designed for vehicles that call for a 203°F thermostat and included seal. The stainless steel body helps resist corrosion in demanding cooling environments, while the jiggle pin weep hole supports air purge during refill and service. This thermostat is a practical choice for cooling system maintenance on applications such as Dodge Charger, Jeep Grand Cherokee, Ram 1500, and Chrysler 300 models listed in the fitment data.

This part cross-references 46792 and 95416203 for the same application. The UltraStat product line is built around durable thermostat construction and BLVT valve technology, which is engineered to reduce abrupt temperature changes in the cooling circuit and help protect system components from thermal shock.

Vehicle Fitment

• Fits 2022-2025 Jeep Wrangler, N/A
• Fits 2021-2024 Dodge Durango, N/A
• Fits 2018-2024 Ram 4000, N/A
• Fits 2021-2023 Chrysler 300, N/A
• Fits 2021-2023 Dodge Challenger, N/A
• Fits 2022-2023 Dodge Charger, N/A
• Fits 2022-2023 Jeep Grand Cherokee, N/A
• Fits 2022-2023 Jeep Grand Cherokee L, N/A
• Fits 2022-2023 Jeep Grand Wagoneer, N/A
• Fits 2022-2023 Jeep Wagoneer, N/A
• Fits 2022-2023 Ram 1500, N/A
• Fits 2022-2023 Ram 1500 Classic, N/A
• Fits 2006-2021 Dodge Charger, N/A
• Fits 2005-2021 Jeep Grand Cherokee, N/A
• Fits 2021 Jeep Wrangler, N/A
• Fits 2011-2021 Ram 1500, N/A
• Fits 2019-2021 Ram 1500 Classic, N/A
• Fits 2005-2020 Chrysler 300, N/A
• Fits 2008-2020 Dodge Challenger, N/A
• Fits 2011-2020 Dodge Durango, N/A
• Fits 2004-2009 Dodge Durango, N/A
• Fits 2011-2019 Ram 2500, N/A
• Fits 2011-2018 Ram 3500, N/A
• Fits 2011-2017 Ram 4000, N/A
• Fits 2003-2010 Dodge Ram 1500, N/A
• Fits 2003-2010 Dodge Ram 2500, N/A
• Fits 2006-2010 Jeep Commander, N/A
• Fits 2007-2009 Chrysler Aspen, N/A
• Fits 2003-2009 Dodge Ram 3500, N/A
• Fits 2005-2008 Dodge Magnum, N/A

Common Cooling System Issues It Can Address

• Engine running cooler or hotter than the specified thermostat range
• Delayed coolant circulation after cold start
• Temperature fluctuation caused by a worn thermostat
• Seal leakage at the thermostat housing interface
• Air trapped in the cooling system after thermostat service

Installation Notes and Tips

Verify the OE temperature specification before installation and confirm the housing surface is clean and flat. The included rubber seal should be seated correctly, and the jiggle pin weep hole should be oriented to aid air bleeding during refill. Use the listed fitment data to confirm the correct application for your Jeep Wrangler, Dodge Charger, Ram 1500, or other covered vehicle before service.

Quality Assurance

Motorad UltraStat thermostats use stainless steel construction for corrosion resistance and BLVT valve technology to help moderate thermal shock in the cooling system. Part number 5416-203 is built to meet the temperature and sealing requirements called out in the product data.