The 2025 Freightliner B2 has 5 cooling system parts with verified fitment on this page — 2 part types and 2 brands, covering all 3 engine options (5.1L L4 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged and 6.7L L6 Turbocharged). Each part includes a manufacturer part number and application notes.
On the 2025 Freightliner B2, 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. All 5 listed parts are Coolant / Antifreeze (4 parts) and Coolant Filter (1 part).
The 2025 Freightliner B2 was sold with 3 engines. 4 parts fit every engine; the other 1 is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2025 Freightliner B2 cooling system parts are PRESTONE (4 parts) and HASTINGS / BALDWIN (1 part).
Each part number listed for the 2025 Freightliner B2 opens a page with every vehicle that part fits.
Coolant / Antifreeze
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2025 B2 engines | AFC10000 | 🇺🇸 US 🇨🇦 CA | Command ESi PrechargedPurple | View on Amazon |
| PRESTONE Fits: all 2025 B2 engines | AFC12100 | 🇺🇸 US 🇨🇦 CA | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
| PRESTONE Fits: all 2025 B2 engines | 115CEL | 🇺🇸 US 🇨🇦 CA | Celsius Extended Life Antifreeze or Command ESi Precharged Can1 Gallon | View on Amazon |
| PRESTONE Fits: all 2025 B2 engines | 78065 | 🇺🇸 US 🇨🇦 CA | 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.
4 Coolant / Antifreeze parts for the 2025 Freightliner B2 come from PRESTONE. Every part fits all 3 engine options (5.1L L4 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged and 6.7L L6 Turbocharged).
Part numbers include PRESTONE AFC10000, PRESTONE AFC12100 and PRESTONE 115CEL, among others listed above.
Coolant Filter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HASTINGS / BALDWIN Fits: 6.7L L6 DIESEL Turbocharged | WC8 | 🇺🇸 US 🇨🇦 CA | 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.
This group shows a single part: HASTINGS / BALDWIN WC8.
Buying Cooling System Parts for a 2025 Freightliner B2
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: Coolant / Antifreeze and Coolant Filter .
Frequently Asked Questions
How many cooling system parts fit the 2025 Freightliner B2?
Our catalog currently lists 5 cooling system parts for the 2025 Freightliner B2 across 2 subcategories and 2 brands, covering all 3 engine options (5.1L L4 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged and 6.7L L6 Turbocharged). Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2025 Freightliner B2 engines?
Some do. 4 parts fit every engine; the other 1 is 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 B2?
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 B2 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 B2?
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 B2
Cooling System Parts for Other Freightliner B2 Years
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