The 2020 Freightliner MB has 14 electrical parts with verified fitment on this page — 3 part types and 6 brands, covering the 6.7L L6 DIESEL Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2020 Freightliner MB, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. All 14 listed parts are Alternator / Generator (6 parts), Battery (5 parts) and Starter Motor (3 parts).
The 2020 Freightliner MB came with a single engine, the 6.7L L6 DIESEL Turbocharged, and every part is verified against it.
6 brands supply electrical parts for the 2020 Freightliner MB, led by WAI GLOBAL (7 parts), BOSCH (2 parts) and FVP (2 parts), plus 3 more brands.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2020 Freightliner MB. 3 parts have it, including WAI GLOBAL 8614N (Alternator / Generator) and FVP P31TAGM (Battery). Each part number opens a page with every vehicle that part fits.
Alternator / Generator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Popular | 8614N | 🇺🇸 US | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL Popular | 8681N | 🇺🇸 US | Does Not Include Pulley | View on Amazon |
| BOSCH | AL9961LH | 🇺🇸 US | Does Not Include Pulley | View on Amazon |
| BOSCH | AL9962SB | 🇺🇸 US | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL | 8741N | 🇺🇸 US | Does Not Include Pulley | View on Amazon |
| WAI GLOBAL | 8912N | 🇺🇸 US | 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 2020 Freightliner MB come from 2 brands — WAI GLOBAL and BOSCH. The "Popular" part is WAI GLOBAL 8614N.
Part numbers include WAI GLOBAL 8614N, WAI GLOBAL 8681N and BOSCH AL9961LH, among others listed above.
Battery
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular | P31TAGM | 🇺🇸 US | Platinum AGMBCI Group: 31T | View on Amazon |
| ACDELCO | 31XAGMT | 🇺🇸 US 🇨🇦 CA | AGMBCI Group: 31 | View on Amazon |
| EXIDE | XRF31D | 🇺🇸 US | RoadforceBCI Group 31 | View on Amazon |
| FVP | PC318STAGM | 🇺🇸 US | Platinum AGM | View on Amazon |
| MOTORCRAFT | BHAGM31 | 🇺🇸 US | 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 are listed for the 2020 Freightliner MB, from FVP, ACDELCO, EXIDE and 1 other brand. FVP P31TAGM carries the "Popular" badge.
This group includes FVP P31TAGM, ACDELCO 31XAGMT and EXIDE XRF31D and the remaining parts above.
Starter Motor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL | 6809N | 🇺🇸 US | Optional Replacement Delco 38MTwith Integral Magnetic Switch | View on Amazon |
| WAI GLOBAL | 6963N | 🇺🇸 US | View on Amazon | |
| WAI GLOBAL | 34029N | 🇺🇸 US | without Ground Stud | 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.
3 Starter Motor parts for the 2020 Freightliner MB come from WAI GLOBAL.
This group includes WAI GLOBAL 6809N, WAI GLOBAL 6963N and WAI GLOBAL 34029N.
Buying Electrical Parts for a 2020 Freightliner MB
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.
- Confirm you have the 6.7L L6 DIESEL Turbocharged engine — every part on this page is matched to it.
- 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 2020 Freightliner MB?
Our catalog currently lists 14 electrical parts for the 2020 Freightliner MB across 3 subcategories and 6 brands, covering the 6.7L L6 DIESEL Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 2020 Freightliner MB?
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 2020 Freightliner MB 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 2020 Freightliner MB?
Every part on this page is matched to the 6.7L L6 DIESEL Turbocharged engine. 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 2020 Freightliner MB
Electrical Parts for Other Freightliner MB Years
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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.