Product Description
MAHLE C31858 is a direct-fit molded-rubber thermostat housing gasket for the 2003–2007 5.9L Cummins. It restores a leak-free seal at the thermostat/water outlet for reliable operating temps and long service life.
- Material: Molded rubber
- OE-style fit and durability
- GTIN/UPC: 027067712226
Fitment
- 2003, 2004, 2005, 2006, 2007 Dodge Ram 2500 / 3500 with 5.9L Cummins (24-valve)
Cross Reference Numbers
- Cummins: 3954829
- Mopar/Chrysler: 5086740AA, K05086740AA
What’s Included
(1) Thermostat housing gasket/seal (thermostat not included).
FAQ
Will this gasket fit my 2003–2007 5.9L Cummins?
Yes—this is the correct thermostat housing gasket for 2003–2007 Ram 2500/3500 with the 5.9L Cummins.
Is the thermostat included?
No. This listing is for the gasket/seal only. Pair with a 180° or 190° thermostat as needed.
What’s the material?
A durable molded-rubber construction designed to seal against the water outlet/thermostat housing.
Any tips for installation?
Clean both mating surfaces, inspect the housing for pitting/warpage, and torque fasteners to OE spec.
