This page lists 20 electrical parts for the 2018 International Workstar, across 6 part types, covering all 5 engine options (12.4L L6 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged, 8.7L L6 DIESEL Turbocharged, 8.9L L6 DIESEL Turbocharged and 9.3L L6 DIESEL Turbocharged). Every part shows its brand, manufacturer part number and fitment notes.
On the 2018 International Workstar, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. 17 parts of the 20 listed are Alternator / Generator (6 parts), Battery (6 parts) and Starter Motor (5 parts). The other 3 part types cover the remaining 3 parts.
The 2018 International Workstar was sold with 5 engines. 6 parts fit every engine; the other 14 are engine-specific. Each part shows which engine(s) it fits.
8 brands supply electrical parts for the 2018 International Workstar, led by WAI GLOBAL (8 parts), DORMAN (3 parts) and TERREPOWER (3 parts), plus 5 more brands. Quality grades include AGM, New and Remanufactured.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2018 International Workstar. 5 parts have it, including WAI GLOBAL 8410N (Alternator / Generator) and ACDELCO 31XAGMT (Battery). Each part number opens a page with every vehicle that part fits.
Alternator / Generator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Popular Fits: 12.4L L6 DIESEL Turbocharged | 8410N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Popular Fits: 12.4L L6 DIESEL Turbocharged | 8681N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Fits: 12.4L L6 DIESEL Turbocharged | 8719N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Fits: 12.4L L6 DIESEL Turbocharged | 8741N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Fits: 12.4L L6 DIESEL Turbocharged | 8614N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Fits: 12.4L L6 DIESEL Turbocharged | 8912N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator.
6 Alternator / Generator parts for the 2018 International Workstar come from WAI GLOBAL. The "Popular" part is WAI GLOBAL 8410N.
Listed part numbers: WAI GLOBAL 8410N, WAI GLOBAL 8681N and WAI GLOBAL 8719N, plus the other parts above.
Battery
AGM (Extended Life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: all 2018 Workstar engines | 31XAGMT | 🇺🇸 US 🇨🇦 CA | AGMBCI Group: 31 | View on Amazon |
| FVP Popular Fits: all 2018 Workstar engines | P31TAGM | 🇺🇸 US 🇨🇦 CA | Platinum AGMBCI Group: 31T | View on Amazon |
| EXIDE Fits: all 2018 Workstar engines | RF31D | 🇺🇸 US 🇨🇦 CA | RoadforceBCI Group 31 | View on Amazon |
| EXIDE Fits: all 2018 Workstar engines | XRF31D | 🇺🇸 US 🇨🇦 CA | RoadforceBCI Group 31 | View on Amazon |
| MOTORCRAFT Fits: all 2018 Workstar engines | BHAGM31 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fleettough/ExtraBCI Group: 31 | View on Amazon |
Performance AGM (Extended Life + Increased Power)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FULLRIVER Fits: all 2018 Workstar engines | FT110031ST | 🇺🇸 US 🇨🇦 CA | BCI Group 31T(Length X Width X Height) 12.99 In x 6.81 In x 9.13 In | View on Amazon |
This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery.
6 Battery parts are listed for the 2018 International Workstar, from EXIDE, ACDELCO, FVP and 2 other brands. ACDELCO 31XAGMT carries the "Popular" badge. All of them fit every engine offered in the 2018 Workstar.
The AGM (Extended Life) section lists 5 options from EXIDE, ACDELCO, FVP and 1 other brand — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. ACDELCO 31XAGMT is listed in this group.
The Performance AGM (Extended Life + Increased Power) section lists 1 option from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT110031ST is listed in this group.
Part numbers include ACDELCO 31XAGMT, FVP P31TAGM and EXIDE RF31D, among others listed above.
Battery Cover
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 8.7L L6 DIESEL Turbocharged, 8.9L L6 DIESEL Turbocharged, 9.3L L6 DIESEL Turbocharged | 2425103 | 🇺🇸 US 🇨🇦 CA | 7400 | View on Amazon |
This table covers the Battery covers.
This group shows a single part: DORMAN 2425103.
Battery Tray
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.7L L6 DIESEL Turbocharged, 8.7L L6 DIESEL Turbocharged, 8.9L L6 DIESEL Turbocharged, 9.3L L6 DIESEL Turbocharged | 2425109 | 🇺🇸 US 🇨🇦 CA | with 25 In. Battery Box | View on Amazon |
This table covers the trays the battery sits in.
One part is listed for the 2018 International Workstar — DORMAN 2425109.
Horn Actuator Pad
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.7L L6 DIESEL Turbocharged, 8.7L L6 DIESEL Turbocharged, 8.9L L6 DIESEL Turbocharged, 9.3L L6 DIESEL Turbocharged | 9245123 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
This table covers the Horn Actuator pads. Typical signs include squeal, grind, or a wear-indicator scrape. Replace pads as an axle set and inspect the rotor or drum they ride on.
One part is listed for the 2018 International Workstar — DORMAN 9245123.
Starter Motor
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Popular Fits: 12.4L L6 DIESEL Turbocharged | 6907N | 🇺🇸 US 🇨🇦 CA | Optional ReplacementDelco 39MT Rotatable Drive End Frame | View on Amazon |
| TERREPOWER Fits: 12.4L L6 DIESEL Turbocharged | 91014760N | 🇺🇸 US 🇨🇦 CA | Delco Unit39MT | View on Amazon |
| WAI GLOBAL Fits: 12.4L L6 DIESEL Turbocharged | 6859N | 🇺🇸 US 🇨🇦 CA | Delco 38MT12-Tooth | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TERREPOWER Fits: 12.4L L6 DIESEL Turbocharged | 91014760 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| TERREPOWER Fits: 12.4L L6 DIESEL Turbocharged | 91047850 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor.
5 Starter Motor parts for the 2018 International Workstar come from 2 brands — TERREPOWER and WAI GLOBAL. The "Popular" part is WAI GLOBAL 6907N.
The New section lists 3 options from WAI GLOBAL and TERREPOWER — brand-new units rather than rebuilt ones. WAI GLOBAL 6907N is listed in this group.
The Remanufactured section lists 2 options from TERREPOWER — factory-rebuilt units with new wear components. TERREPOWER 91014760 is listed in this group.
Part numbers include WAI GLOBAL 6907N, TERREPOWER 91014760N and WAI GLOBAL 6859N, among others listed above.
Buying Electrical Parts for a 2018 International Workstar
On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.
- Match the engine first. Some electrical 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, clean or renew the battery terminals and grounds with any charging-system repair.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Alternator / Generator and Battery .
Frequently Asked Questions
How many electrical parts fit the 2018 International Workstar?
Our catalog currently lists 20 electrical parts for the 2018 International Workstar across 6 subcategories and 8 brands, covering all 5 engine options (12.4L L6 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged, 8.7L L6 DIESEL Turbocharged, 8.9L L6 DIESEL Turbocharged and 9.3L L6 DIESEL Turbocharged). Each part is matched to the engine(s) it fits.
Do electrical parts differ between 2018 International Workstar engines?
Some do. 6 parts fit every engine; the other 14 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 electrical problems on a 2018 International Workstar?
Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. 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, clean or renew the battery terminals and grounds with any charging-system repair.
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 Workstar 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 Workstar?
First match the engine — each row shows which engine(s) the part fits. Then test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2018 International Workstar
Electrical Parts for Other International Workstar Years
Switch vehicle or jump to a subcategory
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.