This page lists 20 electrical parts for the 2017 Freightliner 122SD, across 3 part types, covering all 4 engine options (12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged and 15.6L DIESEL). Every part shows its brand, manufacturer part number and fitment notes.
The electrical system on the 2017 Freightliner 122SD covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. All 20 listed parts are Alternator / Generator (8 parts), Starter Motor (7 parts) and Battery (5 parts).
The 2017 Freightliner 122SD was sold with 4 engines. 3 parts fit every engine; the other 17 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2017 Freightliner 122SD electrical parts are WAI GLOBAL (11 parts), BOSCH (2 parts) and FVP (2 parts), plus 4 more brands. Quality grades include New and Remanufactured.
3 parts on this 2017 Freightliner 122SD page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including WAI GLOBAL 12716N (Alternator / Generator) and FVP P31TAGM (Battery). Click any part number to see every vehicle that part fits.
Alternator / Generator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Popular Fits: 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged | 12716N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Popular Fits: 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged | 8681N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| BOSCH Fits: 14.8L L6 DIESEL Turbocharged | AL9961LH | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| BOSCH Fits: 14.8L L6 DIESEL Turbocharged | AL9962SB | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Fits: 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged | 8719N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Fits: 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged | 8741N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Fits: 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged | 8614N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Fits: 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L 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.
8 Alternator / Generator parts are listed for the 2017 Freightliner 122SD, from WAI GLOBAL and BOSCH. WAI GLOBAL 12716N carries the "Popular" badge.
Listed part numbers: WAI GLOBAL 12716N, WAI GLOBAL 8681N and BOSCH AL9961LH, plus the other parts above.
Battery
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular Fits: all 2017 122SD engines | P31TAGM | 🇺🇸 US 🇨🇦 CA | Platinum AGMBCI Group: 31T | View on Amazon |
| ACDELCO Fits: 12.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged, 15.6L DIESEL | 31XAGMT | 🇺🇸 US 🇨🇦 CA | AGMBCI Group: 31 | View on Amazon |
| EXIDE Fits: 12.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged, 15.6L DIESEL | XRF31D | 🇺🇸 US 🇨🇦 CA | RoadforceBCI Group 31 | View on Amazon |
| FVP Fits: all 2017 122SD engines | PC318STAGM | 🇺🇸 US 🇨🇦 CA | Platinum AGM | View on Amazon |
| MOTORCRAFT Fits: all 2017 122SD engines | BHAGM31 | 🇺🇸 US 🇨🇦 CA | Fleettough/ExtraBCI Group: 31 | 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.
5 Battery parts for the 2017 Freightliner 122SD come from 4 brands — FVP, ACDELCO, EXIDE and 1 other brand. The "Popular" part is FVP P31TAGM. 3 parts fit every engine; the other 2 are engine-specific.
Listed part numbers: FVP P31TAGM, ACDELCO 31XAGMT and EXIDE XRF31D, plus the other parts above.
Starter Motor
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TERREPOWER Fits: 12.8L L6 DIESEL Turbocharged, 15.6L DIESEL | 91014808N | 🇺🇸 US 🇨🇦 CA | Delco Unit39MT | View on Amazon |
| WAI GLOBAL Fits: 12.8L L6 DIESEL Turbocharged | 34010N | 🇺🇸 US 🇨🇦 CA | Fits with 150 Tooth Ring Gear Onlyor Optional Replacement with 150 Tooth Ring GearOnly | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TERREPOWER Fits: 12.8L L6 DIESEL Turbocharged, 15.6L DIESEL | 91014808 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Fits: 14.8L L6 DIESEL Turbocharged | 34010N | 🇺🇸 US 🇨🇦 CA | Fits with 150 Tooth Ring Gear Onlyor Optional Replacement with 150 Tooth Ring GearOnly | View on Amazon |
| WAI GLOBAL Fits: 14.9L L6 DIESEL Turbocharged | 6924N | 🇺🇸 US 🇨🇦 CA | Optional ReplacementDelco 39MT Rotatable Drive End Frame | View on Amazon |
| WAI GLOBAL Fits: 14.9L L6 DIESEL Turbocharged | 6911N | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WAI GLOBAL Fits: 14.9L L6 DIESEL Turbocharged | 34043N | 🇺🇸 US 🇨🇦 CA | 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.
7 Starter Motor parts are listed for the 2017 Freightliner 122SD, from WAI GLOBAL and TERREPOWER.
In the New grade, TERREPOWER and WAI GLOBAL supply 2 parts: brand-new units rather than rebuilt ones. A representative part number is TERREPOWER 91014808N.
In the Remanufactured grade, TERREPOWER supplies 1 part: factory-rebuilt units with new wear components. A representative part number is TERREPOWER 91014808.
4 ungrouped parts are not assigned to a grade, with the same engine-level match.
Listed part numbers: TERREPOWER 91014808N, WAI GLOBAL 34010N and TERREPOWER 91014808, plus the other parts above.
Buying Electrical Parts for a 2017 Freightliner 122SD
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 Starter Motor .
Frequently Asked Questions
How many electrical parts fit the 2017 Freightliner 122SD?
Our catalog currently lists 20 electrical parts for the 2017 Freightliner 122SD across 3 subcategories and 7 brands, covering all 4 engine options (12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged and 15.6L DIESEL). Each part is matched to the engine(s) it fits.
Do electrical parts differ between 2017 Freightliner 122SD engines?
Some do. 3 parts fit every engine; the other 17 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 2017 Freightliner 122SD?
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 2017 Freightliner 122SD 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 2017 Freightliner 122SD?
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 2017 Freightliner 122SD
Electrical Parts for Other Freightliner 122SD Years
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