The 2026 Freightliner B2 has 9 engine parts with verified fitment on this page — 2 part types and 4 brands, covering all 3 engine options (5.1L L4 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged and 8.9L L6 Turbocharged). Each part includes a manufacturer part number and application notes.
On the 2026 Freightliner B2, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components. All 9 listed parts are Oil (5 parts) and Oil Filter (4 parts).
The 2026 Freightliner B2 was sold with 3 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2026 Freightliner B2 engine parts are VALVOLINE (5 parts), WIX (2 parts) and MANN (1 part), plus 1 more brand. Quality grades include Heavy Duty / Diesel, High Performance / Heavy Duty and Standard Replacement.
Each part number listed for the 2026 Freightliner B2 opens a page with every vehicle that part fits.
Oil
Summary: Notes list SAE 10W-30 and SAE 15W-40. Confirm the engine and the weight on the filler cap before you buy. Replacement brands in this table include VALVOLINE.
Full Synthetic
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 5.1L L4 DIESEL Turbocharged | 909772 | 🇺🇸 US | Heavy Duty Full Synthetic SAE 15W-40 DIESEL1 Gallon | View on Amazon |
Heavy Duty / Diesel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 5.1L L4 DIESEL Turbocharged | 909778 | 🇺🇸 US | Heavy Duty Conventional SAE 15W-40 DIESEL1 Gallon | View on Amazon |
Synthetic Blend
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 5.1L L4 DIESEL Turbocharged | 909766 | 🇺🇸 US | Heavy Duty Synthetic Blend SAE 15W-40 DIESEL1 Gallon | View on Amazon |
| VALVOLINE Fits: 5.1L L4 DIESEL Turbocharged | 909776 | 🇺🇸 US | Heavy Duty Synthetic Blend SAE 10W-30 DIESEL1 Gallon | View on Amazon |
| VALVOLINE Fits: 5.1L L4 DIESEL Turbocharged | 909782 | 🇺🇸 US | Heavy Duty Synthetic Blend SAE 15W-40 DIESEL2.5 Gallon | View on Amazon |
This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable.
VALVOLINE supplies the 5 Oil parts for the 2026 Freightliner B2.
In the Full Synthetic grade, VALVOLINE supplies 1 part: full-synthetic oils. A representative part number is VALVOLINE 909772.
In the Heavy Duty / Diesel grade, VALVOLINE supplies 1 part: grouped under the catalog's "Heavy Duty / Diesel" designation — the notes column spells out what sets them apart. A representative part number is VALVOLINE 909778.
In the Synthetic Blend grade, VALVOLINE supplies 3 parts: synthetic-blend oils. A representative part number is VALVOLINE 909766.
Listed part numbers: VALVOLINE 909772, VALVOLINE 909778 and VALVOLINE 909766, plus the other parts above.
Oil Filter
High Performance / Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WIX Fits: 8.9L L6 Turbocharged | 51748XD | 🇺🇸 US | Extended DrainSpin-On Lube Filter | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MANN Fits: 8.9L L6 Turbocharged | WP12121 | 🇺🇸 US | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HASTINGS / BALDWIN Fits: 5.1L L4 DIESEL Turbocharged | P40017 | 🇺🇸 US | View on Amazon | |
| WIX Fits: 5.1L L4 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged | 57182 | 🇺🇸 US 🇨🇦 CA | Spin-On FilterSpin-On Lube Filter | View on Amazon |
This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive.
4 Oil Filter parts are listed for the 2026 Freightliner B2, from WIX, MANN and HASTINGS / BALDWIN.
In the High Performance / Heavy Duty grade, WIX supplies 1 part: grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. A representative part number is WIX 51748XD.
The Standard Replacement section lists 1 option from MANN — built to original-equipment specification. MANN WP12121 is listed in this group.
2 ungrouped parts are not assigned to a grade, with the same engine-level match.
Part numbers include WIX 51748XD, MANN WP12121 and HASTINGS / BALDWIN P40017, among others listed above.
Buying Engine Parts for a 2026 Freightliner B2
On this vehicle, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.
- Match the engine first. Every engine part here is 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 seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil and Oil Filter .
Frequently Asked Questions
How many engine parts fit the 2026 Freightliner B2?
Our catalog currently lists 9 engine parts for the 2026 Freightliner B2 across 2 subcategories and 4 brands, covering all 3 engine options (5.1L L4 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged and 8.9L L6 Turbocharged). Each part is matched to the engine(s) it fits.
Do engine parts differ between 2026 Freightliner B2 engines?
Yes. Every engine part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. 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 engine problems on a 2026 Freightliner B2?
Common symptoms include oil spots under the vehicle, blue or white exhaust smoke, ticking from the valvetrain, or coolant mysteriously disappearing. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What oil viscosity is listed for the 2026 Freightliner B2?
Oil rows on this page include SAE 10W-30 and SAE 15W-40. Confirm the engine and the weight on the filler cap before you buy — high-mileage and standard fills can differ.
What should I replace at the same time?
Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
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 2026 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 2026 Freightliner B2?
First match the engine — each row shows which engine(s) the part fits. Then engine hard parts are unforgiving of guesswork — confirm the casting or engine code before ordering, because one model year can hide two different blocks. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2026 Freightliner B2
Engine Parts for Other Freightliner B2 Years
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