Motorad Integrated Thermostat Housing: With Seal, 203 Degrees, 928-203
In stock
$19.99
Listed as compatible with this vehicle by the retailer feed.
Check price2018 RAM ProMaster 3500 Thermostats
5 products listed for this model year in the retailer catalog. Check engine and trim details before ordering.
Dorman Thermostat Assembly: Includes Thermostat housing and Gasket, 203 Degrees, 902-3036
In stock
$27.99
Listed as compatible with this vehicle by the retailer feed.
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Dorman Engine Coolant Crossover Pipe, 902-3102
In stock
$57.99
Listed as compatible with this vehicle by the retailer feed.
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Carquest Coolant Housing/Water Outlet: Includes Gasket, CH5997
In stock
$90.99
Listed as compatible with this vehicle by the retailer feed.
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Motorad Integrated Thermostat Housing: 174 Degrees, 994-174
In stock
$115.99
Listed as compatible with this vehicle by the retailer feed.
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This site contains affiliate links. We may earn a commission if you buy through them. We do not sell these products or guarantee merchant inventory. Compatibility is listed by the retailer feed for this vehicle; it is not an OEM confirmation. Catalog snapshot: Aug 15, 2026.