The 2021 Ford Bronco has 63 belt drive parts with verified fitment on this page — 3 part types and 12 brands, covering all 4 engine options (1.5L L3 Turbocharged, 2.0L L4 Turbocharged, 2.3L L4 Turbocharged and 2.7L V6 Turbocharged). Each part includes a manufacturer part number and application notes.
On the 2021 Ford Bronco, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys. All 63 listed parts are Belt (35 parts), Idler Pulley (18 parts) and Belt Tensioner (10 parts).
The 2021 Ford Bronco was sold with 4 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2021 Ford Bronco belt drive parts are GATES (13 parts), MOTORCRAFT (11 parts) and CONTINENTAL (10 parts), plus 9 more brands. Quality grades include Standard Replacement and Economy.
13 parts on this 2021 Ford Bronco page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including GATES K060680 (Belt) and MOTORCRAFT BT164 (Belt Tensioner). Click any part number to see every vehicle that part fits.
Belt
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Popular Fits: 2.7L V6 Turbocharged | K060680 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Micro-V | View on Amazon |
| CADNA Fits: 2.3L L4 Turbocharged | 520K4 | 🇺🇸 US 🇨🇦 CA | Multi-V | View on Amazon |
| CONTINENTAL Fits: 1.5L L3 Turbocharged | 666K6MK | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mileage MakerSerpentine | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged | 510K4MK | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mileage MakerSerpentine | View on Amazon |
| DAYCO Fits: 2.0L L4 Turbocharged | 5040512DR | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Drive Rite®Serpentine | View on Amazon |
| DAYCO Fits: 2.7L V6 Turbocharged | 5060680DR | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Drive Rite®Serpentine | View on Amazon |
| FVP Fits: 1.5L L3 Turbocharged | 670K6 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi V-BeltSerpentine | View on Amazon |
| FVP Fits: 2.0L L4 Turbocharged | 510K4 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi V-BeltSerpentine | View on Amazon |
| FVP Fits: 2.7L V6 Turbocharged | 680K6 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi V-BeltSerpentine | View on Amazon |
| GATES Fits: 2.3L L4 Turbocharged | K040520 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Micro-V | View on Amazon |
| ROADMAX Fits: 2.7L V6 Turbocharged | 6K680AP | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | V-RibbedSerpentine | View on Amazon |
| ULTRA-POWER Fits: 2.7L V6 Turbocharged | 680K6 | 🇺🇸 US 🇨🇦 CA | Multi-V | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL Popular Fits: 2.7L V6 Turbocharged | 4060680 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi V-BeltSerpentine | View on Amazon |
| DAYCO Popular Fits: 2.0L L4 Turbocharged | 5040512 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| DAYCO Popular Fits: 2.7L V6 Turbocharged | 5060680 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| GATES Popular Fits: 2.0L L4 Turbocharged | K040512 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Micro-V | View on Amazon |
| GATES Popular Fits: 2.3L L4 Turbocharged | K040352SF | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Premium OE Stretch Fit Micro-V BeltRequires Installation Tool | View on Amazon |
| MOTORCRAFT Popular Fits: 1.5L L3 Turbocharged | JA661 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| MOTORCRAFT Popular Fits: 2.3L L4 Turbocharged | JK4372 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| ACDELCO Fits: 2.0L L4 Turbocharged | 4K512 | 🇺🇸 US 🇨🇦 CA | Professional / GoldSerpentine | View on Amazon |
| ACDELCO Fits: 2.3L L4 Turbocharged | 4K352SF | 🇺🇸 US 🇨🇦 CA | Professional / GoldStretch Fit | View on Amazon |
| ACDELCO Fits: 2.7L V6 Turbocharged | 6K680 | 🇺🇸 US 🇨🇦 CA | Professional / GoldSerpentine | View on Amazon |
| BANDO Fits: 2.3L L4 Turbocharged | 4PK1320 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | V-RibbedRib Quantity: 4 | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged | 4040361S | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi V-Belt Stretch Belt | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged | 4040512 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi V-BeltSerpentine | View on Amazon |
| CONTINENTAL Fits: 2.3L L4 Turbocharged | 4040520 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi V-BeltSerpentine | View on Amazon |
| DAYCO Fits: 1.5L L3 Turbocharged | 5060453 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| DAYCO Fits: 2.3L L4 Turbocharged | 5040520 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| GATES Fits: 2.0L L4 Turbocharged | K040335SF | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Premium OE Stretch Fit Micro-V BeltRequires Installation Tool | View on Amazon |
| GATES Fits: 2.7L V6 Turbocharged | K060306SF | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Premium OE Stretch Fit Micro-V Belt | View on Amazon |
| MOTORCRAFT Fits: 2.0L L4 Turbocharged | JK4521B | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| MOTORCRAFT Fits: 2.3L L4 Turbocharged | JK4527 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| MOTORCRAFT Fits: 2.7L V6 Turbocharged | JK6322 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| MOTORCRAFT Fits: 2.7L V6 Turbocharged | JK6685B | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 1.5L L3 Turbocharged | K060438SF | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Premium OE Stretch Fit Micro-V 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.
35 Belt parts are listed for the 2021 Ford Bronco, from GATES, CONTINENTAL, DAYCO and 7 other brands. GATES K060680 carries the "Popular" badge. They are grouped as Economy and Standard Replacement, with Standard Replacement the largest group at 22 parts from MOTORCRAFT, CONTINENTAL, DAYCO and 3 other brands.
Belt Tensioner
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CLOYES Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | B20580 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | BT164 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| CONTINENTAL Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | 49881 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Grooved Pulley | View on Amazon |
| GATES Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | 39487 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| LITENS Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | 999672A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CLOYES Fits: 1.5L L3 Turbocharged | B20602 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| CONTINENTAL Fits: 2.7L V6 Turbocharged | 49896 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| GATES Fits: 2.7L V6 Turbocharged | 39474 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| LITENS Fits: 2.7L V6 Turbocharged | 999684A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| MOTORCRAFT Fits: 2.7L V6 Turbocharged | BT155 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
10 Belt Tensioner parts for the 2021 Ford Bronco come from 5 brands — CLOYES, MOTORCRAFT, CONTINENTAL and 2 other brands. The "Popular" part is MOTORCRAFT BT164.
The Economy section lists 1 option from CLOYES — the catalog's value-priced group. CLOYES B20580 is listed in this group.
In the Standard Replacement grade, MOTORCRAFT, CONTINENTAL, GATES and 1 other brand supply 4 parts: built to original-equipment specification. A representative part number is MOTORCRAFT BT164.
5 further parts sit outside the graded sections, with the same engine-level match.
Idler Pulley
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 2.7L V6 Turbocharged | 38018 | 🇺🇸 US 🇨🇦 CA | Professional / GoldExcludes Bracket | View on Amazon |
| GATES Popular Fits: 2.7L V6 Turbocharged | 36100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | GroovedFlanged | View on Amazon |
| MOTORCRAFT Popular Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | YS369 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Smooth | View on Amazon |
| MOTORCRAFT Popular Fits: 2.7L V6 Turbocharged | YS363 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Center | View on Amazon |
| ACDELCO Fits: 2.7L V6 Turbocharged | 36100 | 🇺🇸 US 🇨🇦 CA | Professional / GoldGrooved | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | 50091 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Smooth | View on Amazon |
| CONTINENTAL Fits: 2.7L V6 Turbocharged | 49024 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Smooth | View on Amazon |
| DAYCO Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | 89858 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| DAYCO Fits: 2.7L V6 Turbocharged | 89825 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Smooth | View on Amazon |
| DAYCO Fits: 2.7L V6 Turbocharged | 89851 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Smooth | View on Amazon |
| GATES Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | 36877 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Smooth | View on Amazon |
| GATES Fits: 2.7L V6 Turbocharged | 38018 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | SmoothExcludes Bracket | View on Amazon |
| GATES Fits: 2.7L V6 Turbocharged | 36934 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Smooth | View on Amazon |
| LITENS Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged | 900649A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | SmoothVIN 2022MY | View on Amazon |
| LITENS Fits: 2.7L V6 Turbocharged | 900125A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | SmoothExcludes Bracket | View on Amazon |
| LITENS Fits: 2.7L V6 Turbocharged | 900162A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Grooved | View on Amazon |
| LITENS Fits: 2.7L V6 Turbocharged | 900766A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Smooth | View on Amazon |
| MOTORCRAFT Fits: 1.5L L3 Turbocharged | YS399 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
18 Idler Pulley parts are listed for the 2021 Ford Bronco, from GATES, LITENS, MOTORCRAFT and 3 other brands. ACDELCO 38018 carries the "Popular" badge.
Buying Belt Drive Parts for a 2021 Ford Bronco
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 and Idler Pulley .
Frequently Asked Questions
How many belt drive parts fit the 2021 Ford Bronco?
Our catalog currently lists 63 belt drive parts for the 2021 Ford Bronco across 3 subcategories and 12 brands, covering all 4 engine options (1.5L L3 Turbocharged, 2.0L L4 Turbocharged, 2.3L L4 Turbocharged and 2.7L V6 Turbocharged). Each part is matched to the engine(s) it fits.
Do belt drive parts differ between 2021 Ford Bronco 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 2021 Ford Bronco?
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 Bronco 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 Bronco?
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 2021 Ford Bronco
Belt Drive Parts for Other Ford Bronco Years
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