View our Specials! Coupon Code: SaveIn2026
Exedy Clutch and Flywheel Sale
X
Vehicle Set: Click here to shop 2003 Dodge Ram 3500 parts.

2003 Dodge Ram 3500 Thermostats

Looking for aftermarket parts to modify or upgrade your 2003 Dodge Ram 3500 with thermostats? At Tunersports.com we carry a huge selection of the top name brand performance thermostat parts and accessories.

Thermostat Parts:

Only show in-stock parts

Gates Thermostats

Gates
Gates Thermostats 33579
OUT OF STOCK
33579
Gates 06-08 BMW M5/M6 190 Degree Thermostat
2003-2003 Dodge Ram 3500 Laramie / SLT / ST
$68.73
Gates Thermostats 33915
OUT OF STOCK
33915
Gates 99-06 Dodge Ram Diesel OE Type Thermostat - 190 Degree
2003-2009 Dodge Ram 3500 Laramie / SLT / ST
$58.26
Gates Thermostats 34253
IN STOCK
34253
Gates OE Exact Thermostat
2003-2009 Dodge Ram 3500 Laramie / SLT / ST
$76.64 CLEARANCE
VIEW PRICE IN CART
Details

Mishimoto Thermostats

Mishimoto
Mishimoto Thermostats MMTS-RAM-99H
IN STOCK
MMTS-RAM-99H
A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 5.9L/6.7L cooling system with a Mishimoto Dodge 5.9L/6.7L Cummins High-Temperature Thermostat! This thermostat is designed as a direct-fit replacement for your aged factory unit. Th...
Mishimoto Dodge 5.9L/6.7L Cummins High-Temperature Thermostat
2003-2010 Dodge Ram 3500 Laramie / SLT / ST
$100.17
Details
Mishimoto Thermostats MMTS-RAM-99L
IN STOCK - LOW
MMTS-RAM-99L
A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 5.9L/6.7L cooling system with a Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat! This thermostat is designed as a direct-fit replacement for your aged factory unit. The...
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat
2003-2010 Dodge Ram 3500 Laramie / SLT / ST
$100.17
Details