20 Engine parts are listed for the 2018 Freightliner XB, in 9 part types, covering both the 6.7L L6 DIESEL Turbocharged and the 8.9L L6 DIESEL Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
The engine on the 2018 Freightliner XB covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components. The largest groups are Oil (5 parts), Oil Filter (5 parts) and Oil Pan (3 parts). The other 6 part types cover the remaining 7 parts.
The 2018 Freightliner XB was sold with both the 6.7L L6 DIESEL Turbocharged and the 8.9L L6 DIESEL Turbocharged. 1 part fits every engine; the other 19 are engine-specific. Each part shows which engine(s) it fits.
8 brands supply engine parts for the 2018 Freightliner XB, led by VALVOLINE (5 parts), DORMAN (4 parts) and WIX (3 parts), plus 5 more brands. Quality grades include Standard Replacement, Heavy Duty / Diesel and High Performance / Heavy Duty.
Each part number listed for the 2018 Freightliner XB opens a page with every vehicle that part fits.
Crankcase Pressure Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.7L L6 DIESEL Turbocharged | 9047119 | 🇺🇸 US | Engine Code ISB 6.7 | View on Amazon |
This table covers the Crankcase pressure sensors. Typical signs include a check-engine light for MAP or fuel-rail pressure, or a limp mode under load. A vacuum leak or a clogged reference line will fake a bad pressure sensor.
This group shows a single part: DORMAN 9047119.
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: 8.9L L6 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: 8.9L L6 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: 8.9L L6 DIESEL Turbocharged | 909766 | 🇺🇸 US | Heavy Duty Synthetic Blend SAE 15W-40 DIESEL1 Gallon | View on Amazon |
| VALVOLINE Fits: 8.9L L6 DIESEL Turbocharged | 909776 | 🇺🇸 US | Heavy Duty Synthetic Blend SAE 10W-30 DIESEL1 Gallon | View on Amazon |
| VALVOLINE Fits: 8.9L L6 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.
5 Oil parts for the 2018 Freightliner XB come from VALVOLINE.
The Full Synthetic section lists 1 option from VALVOLINE — full-synthetic oils. VALVOLINE 909772 is listed in this group.
The Heavy Duty / Diesel section lists 1 option from VALVOLINE — grouped under the catalog's "Heavy Duty / Diesel" designation — the notes column spells out what sets them apart. VALVOLINE 909778 is listed in this group.
The Synthetic Blend section lists 3 options from VALVOLINE — synthetic-blend oils. VALVOLINE 909766 is listed in this group.
Listed part numbers: VALVOLINE 909772, VALVOLINE 909778 and VALVOLINE 909766, plus the other parts above.
Oil Cooler
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP Fits: 6.7L L6 DIESEL Turbocharged | SK918335 | 🇺🇸 US | Engine Code ISB 6.7Cooler Core | View on Amazon |
This table covers the heat exchangers that cool engine oil. Typical signs include oil at the cooler fittings, or coolant that looks like a milkshake. Pressure-test both circuits after a cooler swap — a leak here mixes oil and coolant.
This group shows a single part: SKP SK918335.
Oil Dipstick / Tube
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.7L L6 DIESEL Turbocharged | 9176008 | 🇺🇸 US | Dipstick Only | View on Amazon |
This table covers the Oil Dipstick tubes.
This group shows a single part: DORMAN 9176008.
Oil Filter
High Performance / Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WIX Fits: 8.9L L6 DIESEL Turbocharged | 51748XD | 🇺🇸 US | Extended DrainSpin-On Lube Filter | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MANN Fits: 8.9L L6 DIESEL Turbocharged | WP12121 | 🇺🇸 US | View on Amazon | |
| WIX Fits: 8.9L L6 DIESEL Turbocharged | WL10041 | 🇺🇸 US | Vamac Gasket | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HASTINGS / BALDWIN Fits: 6.7L L6 DIESEL Turbocharged | LF551 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WIX Fits: 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.
5 Oil Filter parts for the 2018 Freightliner XB come from 3 brands — WIX, MANN and HASTINGS / BALDWIN.
The High Performance / Heavy Duty section lists 1 option from WIX — grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. WIX 51748XD is listed in this group.
In the Standard Replacement grade, MANN and WIX supply 2 parts: built to original-equipment specification. A representative part number is MANN WP12121.
2 further parts sit outside the graded sections, with the same engine-level match.
Listed part numbers: WIX 51748XD, MANN WP12121 and WIX WL10041, plus the other parts above.
Oil Pan
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.7L L6 DIESEL Turbocharged | 2645065 | 🇺🇸 US | Front SumpEngine Code ISB 6.7 | View on Amazon |
| SPECTRA PREMIUM Fits: 6.7L L6 DIESEL Turbocharged | CMP06A | 🇺🇸 US 🇨🇦 CA | Front SumpEPA 17 | View on Amazon |
| SPECTRA PREMIUM Fits: 6.7L L6 DIESEL Turbocharged | CMP10A | 🇺🇸 US 🇨🇦 CA | Fits Front SumpGasket and/or Sealant Not Included | View on Amazon |
This table covers the oil pans that hold the engine's oil sump.
3 Oil Pan parts are listed for the 2018 Freightliner XB, from SPECTRA PREMIUM and DORMAN.
Part numbers include DORMAN 2645065, SPECTRA PREMIUM CMP06A and SPECTRA PREMIUM CMP10A.
Turbocharger
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: all 2018 XB engines | 2511361 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GPD Fits: 6.7L L6 DIESEL Turbocharged | 2511887 | 🇺🇸 US | Engine Code ISB 6.7 | View on Amazon |
This table covers the turbochargers that compress intake air.
2 Turbocharger parts for the 2018 Freightliner XB come from GPD. 1 part fits every engine; the other 1 is engine-specific.
Listed part numbers: GPD 2511361 and GPD 2511887.
Turbocharger Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: 6.7L L6 DIESEL Turbocharged | 2535074 | 🇺🇸 US 🇨🇦 CA | Only Fits Compatible Aftermarket Turbochargers | View on Amazon |
This table covers the gaskets that seal the Turbocharger. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
One part is listed for the 2018 Freightliner XB — GPD 2535074.
Turbocharger Speed Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.7L L6 DIESEL Turbocharged | 9047146 | 🇺🇸 US | Engine Code ISB 6.7 | View on Amazon |
This table covers the Turbocharger speed sensors. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor.
One part is listed for the 2018 Freightliner XB — DORMAN 9047146.
Buying Engine Parts for a 2018 Freightliner XB
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. Some engine 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 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 2018 Freightliner XB?
Our catalog currently lists 20 engine parts for the 2018 Freightliner XB across 9 subcategories and 8 brands, covering both the 6.7L L6 DIESEL Turbocharged and the 8.9L L6 DIESEL Turbocharged. Each part is matched to the engine(s) it fits.
Do engine parts differ between 2018 Freightliner XB engines?
Some do. 1 part fits every engine; the other 19 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 engine problems on a 2018 Freightliner XB?
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 2018 Freightliner XB?
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 2018 Freightliner XB 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 2018 Freightliner XB?
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 2018 Freightliner XB
Engine Parts for Other Freightliner XB Years
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