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Truck Coolant & Washer Fluid Reservoirs

Compare washer fluid reservoirs, pressurized coolant reservoirs and a replacement coolant level sensor for listed Freightliner, International, Peterbilt and Kenworth applications.

Match the truck model, year and engine configuration before ordering. Check the mounting points, hose connections and supplied components against the reservoir or sensor already fitted to your truck.


Choosing a Replacement Truck Reservoir

Start with the fluid system and vehicle application, then compare the physical connections. This helps distinguish a replacement tank from a sensor-only part and identify any additional components needed.

Washer fluid reservoirs

Listed options cover 2007–2019 Peterbilt 389, 2008–2012 Freightliner Cascadia, and 2022–2026 Peterbilt 579 and Kenworth T680 applications. Compare the specific tank shape and mounting arrangement before choosing a replacement.

Pressurized coolant reservoirs

The collection includes reservoir-and-sensor listings for 2008–2018 International Prostar, including a version explicitly identified for Cummins ISX. Review the exact application details rather than assuming the two versions are interchangeable.

Coolant level sensors

A separate sensor is listed for 2008–2020 Freightliner Cascadia. Confirm the sensor connection and reservoir compatibility when selecting a sensor rather than a complete reservoir assembly.

Connections & included parts

Compare hose outlets, mounting tabs and electrical connectors with the existing part. Check whether the listing supplies a cap, pump, sensor, seals or hardware; those components should not be assumed to come with every tank.

Truck Reservoir FAQs

What is the difference between a coolant reservoir and a washer fluid reservoir?

They serve different vehicle systems. A coolant reservoir belongs to the engine cooling system, while a washer fluid reservoir supplies the windshield washer system. Select the part specified for the system you are repairing.

How do I find the right replacement reservoir for my truck?

Match the model, year and any engine restriction in the product description. Compare the shape, mounting points, hose connections and any available replacement-part references with the existing assembly. Truck make alone does not confirm fitment.

Which washer fluid reservoir applications are listed here?

Current listings include 2007–2019 Peterbilt 389, 2008–2012 Freightliner Cascadia, and 2022–2026 Peterbilt 579 and Kenworth T680. Check each product for the exact application and supplied components.

Are the two International Prostar coolant reservoirs interchangeable?

Do not assume so. Both listings identify 2008–2018 Prostar applications, but one explicitly specifies Cummins ISX. Compare the application notes, connections and part references before ordering.

Can I buy a coolant level sensor separately?

Yes. This category includes a coolant level sensor listed for 2008–2020 Freightliner Cascadia. The International Prostar reservoir listings identify a reservoir and sensor together. Confirm the exact package contents and compatibility in the product description.

Does a replacement reservoir include the cap, pump and hardware?

Included components vary by product. Read the supplied-parts list and check whether existing components must be transferred or purchased separately. A reservoir photo does not establish that every cap, pump, seal or fastener is included.