The 2021 Ford F59 has 26 belt drive parts with verified fitment on this page — 3 part types and 9 brands, covering the 7.3L V8 engine. Each part includes a manufacturer part number and application notes.
On the 2021 Ford F59, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys. All 26 listed parts are Belt (15 parts), Idler Pulley (6 parts) and Belt Tensioner (5 parts).
The 2021 Ford F59 came with a single engine, the 7.3L V8, and every part is verified against it.
9 brands supply belt drive parts for the 2021 Ford F59, led by MOTORCRAFT (7 parts), CONTINENTAL (5 parts) and GATES (5 parts), plus 6 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Ford F59. 6 parts have it, including CONTINENTAL 840K6MK (Belt) and MOTORCRAFT BT154 (Belt Tensioner). Each part number opens a page with every vehicle that part fits.
Belt
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL Popular | 840K6MK | 🇺🇸 US 🇨🇦 CA | Mileage MakerSerpentine | View on Amazon |
| DAYCO | 5060473DR | 🇺🇸 US 🇨🇦 CA | Drive Rite®Serpentine | View on Amazon |
| FVP | 475K6 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| FVP | 840K6 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| ROADMAX | 6K473AP | 🇺🇸 US 🇨🇦 CA | V-RibbedSerpentine | View on Amazon |
| SKP | SK060473 | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | 6K473 | 🇺🇸 US 🇨🇦 CA | Professional / GoldSerpentine | View on Amazon |
| GATES Popular | K060473 | 🇺🇸 US 🇨🇦 CA | Micro-V | View on Amazon |
| ACDELCO | 6K842 | 🇺🇸 US 🇨🇦 CA | Professional / GoldSerpentine | View on Amazon |
| CONTINENTAL | 4060473 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| CONTINENTAL | 4060842 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| DAYCO | 5060473 | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
| GATES | K060842 | 🇺🇸 US 🇨🇦 CA | Micro-V | View on Amazon |
| MOTORCRAFT | JK6480B | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
| MOTORCRAFT | JK6847C | 🇺🇸 US 🇨🇦 CA | Serpentine | 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.
15 Belt parts for the 2021 Ford F59 come from 8 brands — CONTINENTAL, DAYCO, FVP and 5 other brands. The "Popular" part is CONTINENTAL 840K6MK.
The Economy section lists 6 options from FVP, CONTINENTAL, DAYCO and 2 other brands — the catalog's value-priced group. CONTINENTAL 840K6MK is listed in this group.
In the Standard Replacement grade, ACDELCO, GATES, CONTINENTAL and 2 other brands supply 9 parts: built to original-equipment specification. A representative part number is ACDELCO 6K473.
Belt Tensioner
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular | BT154 | 🇺🇸 US 🇨🇦 CA | Drive Belt Tensioner | View on Amazon |
| CONTINENTAL | 49859 | 🇺🇸 US 🇨🇦 CA | Multi-V | View on Amazon |
| GATES | 38785 | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
| LITENS | 999632A | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| MOTORCRAFT | BT162 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Alternator or Extra Heavy Duty AlternatorPulley Assembly - Tension | 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.
5 Belt Tensioner parts are listed for the 2021 Ford F59, from MOTORCRAFT, CONTINENTAL, GATES and 1 other brand. MOTORCRAFT BT154 carries the "Popular" badge.
This group includes MOTORCRAFT BT154, CONTINENTAL 49859 and GATES 38785 and the remaining parts above.
Idler Pulley
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular | YS382 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| MOTORCRAFT Popular | YS384 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| CONTINENTAL | 50111 | 🇺🇸 US 🇨🇦 CA | Multi-VGrooved | View on Amazon |
| GATES | 36978 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| GATES | 36976 | 🇺🇸 US 🇨🇦 CA | Grooved | View on Amazon |
| MOTORCRAFT | YS381 | 🇺🇸 US 🇨🇦 CA | Grooved | 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.
6 Idler Pulley parts for the 2021 Ford F59 come from 3 brands — MOTORCRAFT, GATES and CONTINENTAL. The "Popular" part is MOTORCRAFT YS382.
Part numbers include MOTORCRAFT YS382, MOTORCRAFT YS384 and CONTINENTAL 50111, among others listed above.
Buying Belt Drive Parts for a 2021 Ford F59
On this vehicle, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.
- Confirm you have the 7.3L V8 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 Idler Pulley .
Frequently Asked Questions
How many belt drive parts fit the 2021 Ford F59?
Our catalog currently lists 26 belt drive parts for the 2021 Ford F59 across 3 subcategories and 9 brands, covering the 7.3L V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of belt drive problems on a 2021 Ford F59?
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 Ford F59 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 Ford F59?
Every part on this page is matched to the 7.3L V8 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 Ford F59
Belt Drive Parts for Other Ford F59 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.