DORMAN 603861
DORMAN part number 603861 is a coolant reservoir in the Cooling System system. This catalog matches it to 113 year-and-engine configurations from 2017 to 2025.
Verified fitment includes 2025 Buick Envision 2.0L L4 Turbocharged ; 2025 Cadillac XT4 2.0L L4 Turbocharged ; 2025 Cadillac XT5 2.0L L4 Turbocharged ; 2025 Cadillac XT5 3.6L V6 ; 2025 Cadillac XT6 2.0L L4 Turbocharged , plus 108 other configurations. See every vehicle this part fits.
Frequently Asked Questions
What is DORMAN 603861?
DORMAN part number 603861 is a coolant reservoir with published application data for 113 vehicle configurations from 2017 to 2025. Use the manufacturer part number to cross-reference your old part or a repair quote before you order.
Which vehicles does DORMAN 603861 fit?
This catalog matches 603861 to 113 year-and-engine configurations from 2017 to 2025. Open the compatible-vehicles list for every make, model and engine, and read the notes for position or trim qualifiers.
Is DORMAN 603861 OEM or aftermarket?
What matters is the published application data for this part number, not the label on the box. DORMAN 603861 is listed with its manufacturer part number so you can compare it to an OEM number or another brand that covers the same fitment.
AutoFactsDB is reader-supported. As an Amazon Associate, we earn from qualifying purchases made through links on this page — at no extra cost to you.
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.