CUMMINS 3954829 Genuine OEM Thermostat Seal for 2003-2018 Dodge Ram Cummins Diesel

The Cummins 3954829 thermostat seal is a factory OEM part designed for 2003-2018 Dodge Ram Cummins 5.9L and 6.7L diesel engines. This seal ensures a proper fit between the thermostat and housing, preventing coolant leaks and maintaining optimal engine operating temperatures.

As part of the2003-2007 Cummins Gaskets & Seals, 2007.5-2012 Cummins Gaskets & Seals, 2013-2018 Cummins Gaskets & Seals

categories, this seal also ties into the Cummins Cooling System sections by year for full coverage.

Key Features

• Genuine Cummins OEM thermostat seal - part #3954829
• Fits 2003-2018 Dodge Ram Cummins 5.9L & 6.7L engines
• Prevents coolant leaks at the thermostat housing
• Direct-fit replacement for easy installation
• Backed by Cummins quality for long-lasting reliability

Frequently Asked Questions

Do I need to replace the thermostat seal every time I change the thermostat?

Yes. Anytime the thermostat is removed, the seal should be replaced to ensure a leak-free fit. Reusing old seals can cause coolant leaks and overheating.

Does this seal fit both 5.9L and 6.7L Cummins engines?

Yes, Cummins 3954829 is compatible with all 2003-2018 Dodge Ram Cummins 5.9L and 6.7L models.

Is this the same as a thermostat gasket?

Yes, this part functions as the sealing gasket for the thermostat housing.

What other parts should I replace during cooling system service?

We recommend also checking your 03-07 Cummins gasket sets, 07.5-12 Cummins gaskets, and 13-18 Cummins gaskets for leaks. If your thermostat is faulty, consider upgrading to a Cummins cooling system kit.

Recommended Related Products

• 2003-2007 Cummins Gaskets & Seals
• 2007.5-2012 Cummins Gaskets & Seals
• 2013-2018 Cummins Gaskets & Seals

• Cummins Cooling System 03-07
• Cummins Cooling System 07.5-12
• Cummins Cooling System 13-18

Fitment

• 2003 Dodge Ram 2500/3500 5.9L Cummins
• 2004 Dodge Ram 2500/3500 5.9L Cummins
• 2005 Dodge Ram 2500/3500 5.9L Cummins
• 2006 Dodge Ram 2500/3500 5.9L Cummins
• 2007 Dodge Ram 2500/3500 5.9L Cummins
• 2008 Dodge Ram 2500/3500 6.7L Cummins
• 2009 Dodge Ram 2500/3500 6.7L Cummins
• 2010 Dodge Ram 2500/3500 6.7L Cummins
• 2011 Dodge Ram 2500/3500 6.7L Cummins
• 2012 Dodge Ram 2500/3500 6.7L Cummins

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