8 Belt drive parts are listed for the 2017 Freightliner S2, in 2 part types, covering both the 6.7L L6 DIESEL Turbocharged and the 8.0L V8 Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
The belt drive system on the 2017 Freightliner S2 spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys. All 8 listed parts are Belt Tensioner (6 parts) and Belt (2 parts).
The 2017 Freightliner S2 was sold with both the 6.7L L6 DIESEL Turbocharged and the 8.0L V8 Turbocharged. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
5 brands supply belt drive parts for the 2017 Freightliner S2, led by GATES (2 parts), DAYCO (2 parts) and SKP (2 parts), plus 2 more brands. Quality grades include Standard Replacement, Economy and Heavy Duty.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2017 Freightliner S2. 2 parts have it, including DAYCO 89930 (Belt Tensioner) and GATES 38702 (Belt Tensioner). Each part number opens a page with every vehicle that part fits.
Belt
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 6.7L L6 DIESEL Turbocharged | K080813HD | 🇺🇸 US | Fleet Runner Heavy Duty Micro-V | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Fits: 6.7L L6 DIESEL Turbocharged | 5080813 | 🇺🇸 US | SerpentineGold Label Industrial Poly-Ribbed Belt | View on Amazon |
This table covers the serpentine and accessory belts that drive the front accessories. Typical signs include squeal on cold start, cracks across the ribs, or glazing on the back of the belt. A new belt on a worn tensioner will squeal within weeks — spin the idlers by hand while the belt is off.
2 Belt parts for the 2017 Freightliner S2 come from 2 brands — GATES and DAYCO.
In the Heavy Duty grade, GATES supplies 1 part: rated for severe service. A representative part number is GATES K080813HD.
In the Standard Replacement grade, DAYCO supplies 1 part: built to original-equipment specification. A representative part number is DAYCO 5080813.
Listed part numbers: GATES K080813HD and DAYCO 5080813.
Belt Tensioner
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.7L L6 DIESEL Turbocharged | 419375 | 🇺🇸 US | View on Amazon | |
| SKP Fits: 6.7L L6 DIESEL Turbocharged | SK89930 | 🇺🇸 US | Air Conditioning, Alternator, Fan and Water Pump | View on Amazon |
| SKP Fits: 6.7L L6 DIESEL Turbocharged | SK89490 | 🇺🇸 US | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular Fits: 6.7L L6 DIESEL Turbocharged | 89930 | 🇺🇸 US | Accessory Drive | View on Amazon |
| GATES Popular Fits: 6.7L L6 DIESEL Turbocharged | 38702 | 🇺🇸 US | Fleet Runner | View on Amazon |
| LITENS Fits: 6.7L L6 DIESEL Turbocharged | 910588A | 🇺🇸 US | Air Conditioning, Alternator, Fan and Water Pump | View on Amazon |
This table covers the automatic tensioners that hold belt tension. Typical signs include belt flutter, a chirp that returns after a new belt, or a damper that no longer holds the arm. Replace the tensioner with the belt at higher mileage; the labor overlaps almost entirely.
6 Belt Tensioner parts are listed for the 2017 Freightliner S2, from SKP, DORMAN, DAYCO and 2 other brands. DAYCO 89930 carries the "Popular" badge.
In the Economy grade, SKP and DORMAN supply 3 parts: the catalog's value-priced group. A representative part number is DORMAN 419375.
The Standard Replacement section: 3 options from DAYCO, GATES and LITENS. DAYCO 89930 is listed in this group.
Listed part numbers: DAYCO 89930, DORMAN 419375 and SKP SK89930, plus the other parts above.
Buying Belt Drive Parts for a 2017 Freightliner S2
On this vehicle, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.
- Match the engine first. Every belt drive 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 tensioner and idler pulleys with any belt at higher mileage — the labor overlaps almost entirely.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Belt Tensioner and Belt .
Frequently Asked Questions
How many belt drive parts fit the 2017 Freightliner S2?
Our catalog currently lists 8 belt drive parts for the 2017 Freightliner S2 across 2 subcategories and 5 brands, covering both the 6.7L L6 DIESEL Turbocharged and the 8.0L V8 Turbocharged. Each part is matched to the engine(s) it fits.
Do belt drive parts differ between 2017 Freightliner S2 engines?
Yes. Every belt drive 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 belt drive problems on a 2017 Freightliner S2?
Common symptoms include squealing on cold start, a belt that shows cracking or glazing, or an accessory that slows under load. 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 tensioner and idler pulleys with any belt at higher mileage — the labor overlaps almost entirely.
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 S2 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 S2?
First match the engine — each row shows which engine(s) the part fits. Then a new belt on a worn tensioner will squeal within weeks — check tensioner damping and idler bearings while the belt is off. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2017 Freightliner S2
Belt Drive Parts for Other Freightliner S2 Years
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