DORMAN 603840
DORMAN part number 603840 is a coolant reservoir in the Cooling System system. This catalog matches it to 33 year-and-engine configurations from 2014 to 2021.
Verified fitment includes 2021 Ram 2500 6.4L V8 ; 2021 Ram 3500 6.4L V8 ; 2021 Ram 4000 6.4L V8 ; 2021 Ram 4500 6.4L V8 ; 2021 Ram 5500 6.4L V8 , plus 28 other configurations. See every vehicle this part fits.
Frequently Asked Questions
What is DORMAN 603840?
DORMAN part number 603840 is a coolant reservoir with published application data for 33 vehicle configurations from 2014 to 2021. Use the manufacturer part number to cross-reference your old part or a repair quote before you order.
Which vehicles does DORMAN 603840 fit?
This catalog matches 603840 to 33 year-and-engine configurations from 2014 to 2021. Open the compatible-vehicles list for every make, model and engine, and read the notes for position or trim qualifiers.
Is DORMAN 603840 OEM or aftermarket?
What matters is the published application data for this part number, not the label on the box. DORMAN 603840 is listed with its manufacturer part number so you can compare it to an OEM number or another brand that covers the same fitment.
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