10 Steering parts are listed for the 2018 International Prostar, in 4 part types, covering both the 12.4L L6 DIESEL Turbocharged and the 14.9L L6 DIESEL Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2018 International Prostar, the steering system connects driver to road through the rack, pump, tie rods, and column components. Most of the listed parts are Power Steering Fluid (4 parts), Tie Rod Assembly (Inner & Outer) (3 parts) and Power Steering Filter (2 parts). The other 1 part type covers the remaining 1 part.
The 2018 International Prostar was sold with both the 12.4L L6 DIESEL Turbocharged and the 14.9L L6 DIESEL Turbocharged. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2018 International Prostar steering parts are VALVOLINE (4 parts), MONROE (3 parts) and HASTINGS / BALDWIN (1 part), plus 2 more brands.
Each part number listed for the 2018 International Prostar opens a page with every vehicle that part fits.
Power Steering Filter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HASTINGS / BALDWIN Fits: 12.4L L6 DIESEL Turbocharged | HF1007 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WIX Fits: 12.4L L6 DIESEL Turbocharged | 57191 | 🇺🇸 US | Spin-On Filter | View on Amazon |
This table covers the Power Steering 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.
2 Power Steering Filter parts are listed for the 2018 International Prostar, from HASTINGS / BALDWIN and WIX.
This group includes HASTINGS / BALDWIN HF1007 and WIX 57191.
Power Steering Fluid
Full Synthetic
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 12.4L L6 DIESEL Turbocharged | 909772 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Full Synthetic SAE 15W-40 DIESEL1 Gallon | View on Amazon |
Heavy Duty / Diesel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 12.4L L6 DIESEL Turbocharged | 909778 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Conventional SAE 15W-40 DIESEL1 Gallon | View on Amazon |
Synthetic Blend
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 12.4L L6 DIESEL Turbocharged | 909766 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Synthetic Blend SAE 15W-40 DIESEL1 Gallon | View on Amazon |
| VALVOLINE Fits: 12.4L L6 DIESEL Turbocharged | 909782 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Synthetic Blend SAE 15W-40 DIESEL2.5 Gallon | View on Amazon |
This table covers the fluids specified for this steering system. Typical signs include discolored fluid, a burnt smell, or a level that keeps dropping. Use only the specification in the notes — the tables group grades because they are not interchangeable.
VALVOLINE supplies the 4 Power Steering Fluid parts for the 2018 International Prostar.
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 2 parts: synthetic-blend oils. A representative part number is VALVOLINE 909766.
Part numbers include VALVOLINE 909772, VALVOLINE 909778 and VALVOLINE 909766, among others listed above.
Power Steering Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 12.4L L6 DIESEL Turbocharged | 9241060 | 🇺🇸 US 🇨🇦 CA | 1.5L ReservoirDiameter: 2.3 in | View on Amazon |
This table covers the Power Steering Reservoir caps. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable.
This group shows a single part: DORMAN 9241060.
Tie Rod Assembly (Inner & Outer)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MONROE Fits: 12.4L L6 DIESEL Turbocharged | TR10056 | 🇺🇸 US 🇨🇦 CA | FrontFrom 12/12 | View on Amazon |
| MONROE Fits: 12.4L L6 DIESEL Turbocharged | TR10057 | 🇺🇸 US 🇨🇦 CA | FrontThru 12/12 | View on Amazon |
| MONROE Fits: 12.4L L6 DIESEL Turbocharged | TR10058 | 🇺🇸 US 🇨🇦 CA | Frontwith 12000 (lb) - 12500 (lb) Hendrickson Steertek NXT Maxxpower Air Suspension | View on Amazon |
This table covers complete inner-and-outer tie-rod assemblies.
3 Tie Rod Assembly (Inner & Outer) parts for the 2018 International Prostar come from MONROE.
Listed part numbers: MONROE TR10056, MONROE TR10057 and MONROE TR10058.
Buying Steering Parts for a 2018 International Prostar
On this vehicle, the steering system connects driver to road through the rack, pump, tie rods, and column components.
- Match the engine first. Every steering 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 inner and outer tie-rod ends together on higher-mileage vehicles, then get an alignment.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Power Steering Fluid and Tie Rod Assembly (Inner & Outer) .
Frequently Asked Questions
How many steering parts fit the 2018 International Prostar?
Our catalog currently lists 10 steering parts for the 2018 International Prostar across 4 subcategories and 5 brands, covering both the 12.4L L6 DIESEL Turbocharged and the 14.9L L6 DIESEL Turbocharged. Each part is matched to the engine(s) it fits.
Do steering parts differ between 2018 International Prostar engines?
Yes. Every steering 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 steering problems on a 2018 International Prostar?
Common symptoms include play or looseness on center, a whine when turning, fluid weeping from rack boots, or uneven tire wear on the front axle. 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 inner and outer tie-rod ends together on higher-mileage vehicles, then get an alignment.
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 International Prostar 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 International Prostar?
First match the engine — each row shows which engine(s) the part fits. Then flush old power-steering fluid when replacing a pump or rack — grit in the old fluid is the number-one cause of repeat failure. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2018 International Prostar
Steering Parts for Other International Prostar Years
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