Keep your Sprinter's cooling system holding coolant and proper pressure with the Dorman - OE Solutions Engine Coolant Reservoir 603-836. This pressurized replacement tank drops in on the 2007-2009 Dodge Sprinter 2500 and 3500 (V6-3.0L), the 2007-2018 Freightliner Sprinter 2500 and 3500 (L4-2.1L, V6-3.0L), the 2007-2018 Mercedes-Benz Sprinter (L4-2.1L), and the 2010-2018 Mercedes-Benz Sprinter 2500 and 3500 (L4-2.1L, V6-3.0L) — see the Buyer's Guide tab for the full application list.
- Pressurized reservoir: holds the coolant expansion volume under pressure, with a 10.75 Qt. capacity.
- Twist-on cap included: the supplied cap has a maximum pressure rating of 20 PSI.
- Level sensor and mounting brackets included: comes with the coolant level sensor and mounting brackets pre-fitted for the listed applications.
- Durable build: molded from quality plastic to withstand underhood heat and engine vibration.
Engineered to install like the original part on the listed applications. Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Package contents: 1 coolant reservoir and 1 cap. Country of origin: Taiwan. Backed by Dorman's 100 years of automotive aftermarket experience.
Interchange: Manufacturer part number 603-836 (also 603836).
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this part do?
It is a pressurized engine coolant reservoir that holds the cooling system's expansion coolant under pressure, with a 10.75 Qt. capacity.
Does it come with a cap?
Yes. A twist-on cap is included, and it carries a maximum pressure rating of 20 PSI.
Are the level sensor and mounting brackets included?
Yes, the coolant level sensor and mounting brackets are included. Mounting hardware is not included; consult the vehicle service information for the correct fasteners.
Which vehicles does 603-836 fit?
It fits various 2007-2018 Sprinter applications from Dodge, Freightliner, and Mercedes-Benz with the L4-2.1L or V6-3.0L engine. See the Buyer's Guide tab for the full list.
What are signs this reservoir may need replacing?
Cracks in the tank, coolant seepage, or a reservoir that won't hold level or pressure can be signs. Diagnose the cause before replacing, as leaks may originate elsewhere.
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