9 Belt drive parts are listed for the 2021 Freightliner Sprinter 3500XD, in 3 part types, covering the 3.0L V6 DIESEL Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The belt drive system on the 2021 Freightliner Sprinter 3500XD spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys. All 9 listed parts are Belt (5 parts), Belt Tensioner (3 parts) and Idler Pulley (1 part).
Every part on this page is matched to the 3.0L V6 DIESEL Turbocharged — the only engine offered in the 2021 Freightliner Sprinter 3500XD.
The most listed brands for 2021 Freightliner Sprinter 3500XD belt drive parts are DAYCO (4 parts), CONTINENTAL (3 parts) and FVP (1 part), plus 1 more brand. Quality grades include Economy and Standard Replacement.
1 part on this 2021 Freightliner Sprinter 3500XD page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — DAYCO 5070801 (Belt). Click any part number to see every vehicle that part fits.
Belt
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL | 801K7MK | 🇺🇸 US 🇨🇦 CA | Mileage MakerSerpentine | View on Amazon |
| DAYCO | 5070801DR | 🇺🇸 US 🇨🇦 CA | Drive Rite®Serpentine | View on Amazon |
| FVP | 801K7 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular | 5070801 | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
| CONTINENTAL | 4070802 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | 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.
5 Belt parts are listed for the 2021 Freightliner Sprinter 3500XD, from CONTINENTAL, DAYCO and FVP. DAYCO 5070801 carries the "Popular" badge.
In the Economy grade, CONTINENTAL, DAYCO and FVP supply 3 parts: the catalog's value-priced group. A representative part number is CONTINENTAL 801K7MK.
The Standard Replacement section lists 2 options from DAYCO and CONTINENTAL — built to original-equipment specification. DAYCO 5070801 is listed in this group.
Part numbers include DAYCO 5070801, CONTINENTAL 801K7MK and DAYCO 5070801DR, among others listed above.
Belt Tensioner
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP | SKAPV2554 | 🇺🇸 US 🇨🇦 CA | with Rear Air Conditioning | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO | 89651 | 🇺🇸 US 🇨🇦 CA | Pulley 1 Diameter: 65 mm | View on Amazon |
| DAYCO | 89463 | 🇺🇸 US 🇨🇦 CA | Automatic TensionerHeavy Duty | 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.
3 Belt Tensioner parts for the 2021 Freightliner Sprinter 3500XD come from 2 brands — DAYCO and SKP.
The Economy section: 1 option from SKP. SKP SKAPV2554 is listed in this group.
Standard Replacement: 2 parts, from DAYCO. A representative part number is DAYCO 89651.
This group includes SKP SKAPV2554, DAYCO 89651 and DAYCO 89463.
Idler Pulley
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL | 50110 | 🇺🇸 US 🇨🇦 CA | Multi-VGrooved | View on Amazon |
This table covers the idler pulleys the belt wraps around. Typical signs include a chirp that follows engine speed, or a pulley that feels rough or has play. Replace a noisy idler with the belt — the labor is already paid for.
One part is listed for the 2021 Freightliner Sprinter 3500XD — CONTINENTAL 50110.
Buying Belt Drive Parts for a 2021 Freightliner Sprinter 3500XD
On this vehicle, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.
- Confirm you have the 3.0L V6 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, 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 and Belt Tensioner .
Frequently Asked Questions
How many belt drive parts fit the 2021 Freightliner Sprinter 3500XD?
Our catalog currently lists 9 belt drive parts for the 2021 Freightliner Sprinter 3500XD across 3 subcategories and 4 brands, covering the 3.0L V6 DIESEL Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of belt drive problems on a 2021 Freightliner Sprinter 3500XD?
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 2021 Freightliner Sprinter 3500XD 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 2021 Freightliner Sprinter 3500XD?
Every part on this page is matched to the 3.0L V6 DIESEL Turbocharged engine. 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 2021 Freightliner Sprinter 3500XD
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