The 2025 Freightliner Cascadia has 42 cooling system parts with verified fitment on this page — 8 part types and 7 brands, covering all 6 engine options (11.9L, 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged and more). Each part includes a manufacturer part number and application notes.
On the 2025 Freightliner Cascadia, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. Most of the listed parts are Thermostat (21 parts), Radiator Hose (8 parts) and Coolant / Antifreeze (4 parts). The other 5 part types cover the remaining 9 parts.
The 2025 Freightliner Cascadia was sold with 6 engines. 9 parts fit every engine; the other 33 are engine-specific. Each part shows which engine(s) it fits.
7 brands supply cooling system parts for the 2025 Freightliner Cascadia, led by CALORSTAT (20 parts), GATES (10 parts) and PRESTONE (4 parts), plus 4 more brands. Quality grades include Standard Replacement and Heavy Duty.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2025 Freightliner Cascadia. 5 parts have it, including GATES 34148 (Thermostat) and CALORSTAT THS1695876 (Thermostat). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2025 Cascadia engines | AFC10000 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Command ESi PrechargedPurple | View on Amazon |
| PRESTONE Fits: all 2025 Cascadia engines | AFC12100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
| PRESTONE Fits: all 2025 Cascadia engines | 115CEL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Celsius Extended Life Antifreeze or Command ESi Precharged Can1 Gallon | View on Amazon |
| PRESTONE Fits: all 2025 Cascadia engines | 78065 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Heavy Duty | View on Amazon |
This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator.
PRESTONE supplies the 4 Coolant / Antifreeze parts for the 2025 Freightliner Cascadia. All of them fit every engine offered in the 2025 Cascadia.
Listed part numbers: PRESTONE AFC10000, PRESTONE AFC12100 and PRESTONE 115CEL, plus the other parts above.
Coolant Filter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DONALDSON Fits: 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged | P551008 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Coolant Filter, Cartridge | View on Amazon |
This table covers the Coolant filters. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for.
One part is listed for the 2025 Freightliner Cascadia — DONALDSON P551008.
Coolant Reservoir
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2025 Cascadia engines | 6031316 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the overflow / expansion tanks that hold extra coolant.
This group shows a single part: DORMAN 6031316.
Intercooler
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SPECTRA PREMIUM Fits: all 2025 Cascadia engines | 44011748 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 36.25 IN X 26.3125 IN X 1.9375 IN Corewith 4 IN Inlet | View on Amazon |
This table covers the intercoolers that cool turbo or supercharger charge air.
One part is listed for the 2025 Freightliner Cascadia — SPECTRA PREMIUM 44011748.
Intercooler Air Hose / Pipe
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL Fits: 14.8L L6 DIESEL Turbocharged | 57513 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Convoluted Charge Air | View on Amazon |
| GATES Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | 26204 | 🇺🇸 US 🇨🇦 CA | Turbocharger Hose (Ring-Retained)4" x 8" (110 psi) | View on Amazon |
| GATES Fits: 11.9L, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | 26203 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Turbocharger Hose (Ring-Retained)4" x 6" (110 psi) | View on Amazon |
This table covers the Intercooler Air Hose pipes.
3 Intercooler Air Hose / Pipe parts are listed for the 2025 Freightliner Cascadia, from GATES and CONTINENTAL.
Part numbers include CONTINENTAL 57513, GATES 26204 and GATES 26203.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SPECTRA PREMIUM Fits: all 2025 Cascadia engines | 20011775P | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Aluminum Core with Plastic Tanks | View on Amazon |
| SPECTRA PREMIUM Fits: all 2025 Cascadia engines | 20011775 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Aluminum Core / Aluminum Tank | View on Amazon |
| SPECTRA PREMIUM Fits: all 2025 Cascadia engines | 20011780P | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Aluminum Core with Plastic Tanks | View on Amazon |
This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap.
SPECTRA PREMIUM supplies the 3 Radiator parts for the 2025 Freightliner Cascadia. All of them fit every engine offered in the 2025 Cascadia.
Part numbers include SPECTRA PREMIUM 20011775P, SPECTRA PREMIUM 20011775 and SPECTRA PREMIUM 20011780P.
Radiator Hose
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL Fits: 14.8L L6 DIESEL Turbocharged | 61116 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Molded | View on Amazon |
| GATES Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | 21891 | 🇺🇸 US 🇨🇦 CA | Molded | View on Amazon |
| GATES Fits: 11.9L | 52465 | 🇺🇸 US 🇨🇦 CA | Molded | View on Amazon |
| GATES Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | 24047 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Molded | View on Amazon |
| GATES Fits: 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged | 52120 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Molded | View on Amazon |
| GATES Fits: 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged | 52121 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Molded | View on Amazon |
| GATES Fits: 15.6L L6 DIESEL Turbocharged | 52111 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Molded | View on Amazon |
| GATES Fits: 15.6L L6 DIESEL Turbocharged | 52112 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Molded | View on Amazon |
This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle.
8 Radiator Hose parts for the 2025 Freightliner Cascadia come from 2 brands — GATES and CONTINENTAL.
This group includes CONTINENTAL 61116, GATES 21891 and GATES 52465 and the remaining parts above.
Thermostat
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Popular Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | 34148 | 🇺🇸 US 🇨🇦 CA | Heavy-Duty | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT Popular Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1695876 | 🇺🇸 US 🇨🇦 CA | Does not include seal | View on Amazon |
| CALORSTAT Popular Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1910488 | 🇺🇸 US 🇨🇦 CA | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1695782 | 🇺🇸 US 🇨🇦 CA | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1910582 | 🇺🇸 US 🇨🇦 CA | PerformanceDoes Not Include Seal | View on Amazon |
| CALORSTAT Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1911482 | 🇺🇸 US 🇨🇦 CA | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1910682 | 🇺🇸 US 🇨🇦 CA | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1913277 | 🇺🇸 US 🇨🇦 CA | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1913482 | 🇺🇸 US 🇨🇦 CA | Height Between Flanges: 1.29 InDoes Not Include Seal | View on Amazon |
| CALORSTAT Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1911787 | 🇺🇸 US 🇨🇦 CA | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L, 14.9L L6 DIESEL Turbocharged | THS1913182 | 🇺🇸 US 🇨🇦 CA | Height Between Flanges: 1.27 InDoes Not Include Seal | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT Popular Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1695876 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Does not include seal | View on Amazon |
| CALORSTAT Popular Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1910488 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1695782 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1910582 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | PerformanceDoes Not Include Seal | View on Amazon |
| CALORSTAT Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1911482 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1910682 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1913277 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1913482 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Height Between Flanges: 1.29 InDoes Not Include Seal | View on Amazon |
| CALORSTAT Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1911787 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Does not include seal | View on Amazon |
| CALORSTAT Fits: 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | THS1913182 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Height Between Flanges: 1.27 InDoes Not Include Seal | View on Amazon |
This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part.
21 Thermostat parts for the 2025 Freightliner Cascadia come from 2 brands — CALORSTAT and GATES. The "Popular" part is GATES 34148.
In the Heavy Duty grade, GATES supplies 1 part: rated for severe service. A representative part number is GATES 34148.
In the Standard Replacement grade, CALORSTAT supplies 10 parts: built to original-equipment specification. A representative part number is CALORSTAT THS1695876.
10 further parts sit outside the graded sections, with the same engine-level match.
Buying Cooling System Parts for a 2025 Freightliner Cascadia
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Match the engine first. Some cooling system parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Thermostat and Radiator Hose .
Frequently Asked Questions
How many cooling system parts fit the 2025 Freightliner Cascadia?
Our catalog currently lists 42 cooling system parts for the 2025 Freightliner Cascadia across 8 subcategories and 7 brands, covering all 6 engine options (11.9L, 11.9L DIESEL, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged and more). Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2025 Freightliner Cascadia engines?
Some do. 9 parts fit every engine; the other 33 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 2025 Freightliner Cascadia?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2025 Freightliner Cascadia was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2025 Freightliner Cascadia?
First match the engine — each row shows which engine(s) the part fits. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2025 Freightliner Cascadia
Cooling System Parts for Other Freightliner Cascadia Years
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