2020 Mustang Belts – OEM Serpentine & Accessory Belts for Reliable Operation

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Power Your Mustang’s Essentials

The serpentine and accessory belts on your 2020 Ford Mustang drive vital systems like the alternator, water pump, A/C compressor, and power steering (if equipped). If your belt is cracking, fraying, or squealing, it’s time to replace it before you risk a roadside breakdown.

These OEM-spec belts are designed for exact fit and long-lasting durability. Whether you’re driving a 2.3L EcoBoost, 5.0L GT, or 5.2L GT500, these belts ensure proper power delivery to your engine accessories with quiet, slip-free operation.

Seat Belt Assembly

Part Number: JR3Z-76611B09-AA
Ford Ford
Other Names: Lap & Shoulder Belt
Description: Mustang. Front. Left. Convertible, from 03/10/2015.
Fits:
  • Ford:
    • Mustang
MSRP $429.95
$299.25

Seat Belt Assembly

Part Number: JR3Z-76611B69-CC
Ford Ford
Other Names: Lap & Shoulder Belt
Description: Mustang. Second row. Left. Convertible, from 03/30/2015.
Fits:
  • Ford:
    • Mustang
MSRP $153.93
$107.14

Motorcraft™ AC Belt

Part Number: JK6-295
Ford Ford
Other Names: Motorcraft™ Accessory Drive Belt, V Belt
Description: Routing:Crk,Comp. Compressor. 5.0L. Manual transmission.
Fits:
  • Ford:
    • Mustang
MSRP $64.73
$41.30

Motorcraft™ Serpentine Belt

Part Number: JK4-534
Ford Ford
Other Names: Motorcraft™ Accessory Drive Belt, V Belt
Description: Routing:Crk,Comp. Compressor. Mustang. 2.3l.
Fits:
  • Ford:
    • Mustang
MSRP $56.73
$36.19

Motorcraft™ Serpentine Belt

Part Number: JK6-682
Ford Ford
Other Names: V Belt
Description: Water Pump and Alternator. Mustang. 5.0l. Without supercharger. Mustang. 5.2l. Gt350, gt350r.
Fits:
  • Ford:
    • Mustang
MSRP $54.91
$35.03

Belt Weather-Strip Screw

Part Number: W716914-S307
Ford Ford
Other Names: Passenger Air Bag Bolt, Power Mirror Screw, Compartment Lower Bolt, Mirror Outside Screw, Head Air Bag Screw, Cooler Screw, Screw
Description: Convertible. Without shelby. Air bags, m6 x 20. Cooling-dark horse.
Fits:
  • Ford:
    • Escape,
    • Mustang
  • Lincoln:
    • Continental,
    • MKC
MSRP $5.00
$2.93

Seat Belt Assembly Bolt

Part Number: W716977-S439
Ford Ford
Other Names: Bolt
Description: Coupe.
Fits:
  • Ford:
    • Mustang
MSRP $5.00
$2.93

Motorcraft™ AC Belt

Part Number: JK4-331
Ford Ford
Other Names: Motorcraft™ Serpentine Belt, V Belt
Description: Mustang. 2.3l. Water Pump and Alternator.
Fits:
  • Ford:
    • Mustang
MSRP $29.45
$18.95

Seat Belt Assembly Screw

Part Number: W700883-S450B
Ford Ford
Notes: Included with buckle.
Other Names: Screw
Replaces: W504775-S437
Description: Coupe. Convertible, lower.
Fits:
  • Ford:
    • Mustang
MSRP $5.00
$2.93

Motorcraft™ Serpentine Belt

Part Number: JK4-682
Ford Ford
Other Names: V Belt
Description: Mustang. 5.2l. Gt500. With supercharger. Water Pump and Alternator.
Fits:
  • Ford:
    • Mustang
MSRP $53.82
$34.34

Motorcraft™ AC Belt

Part Number: JK6-342-B
Ford Ford
Other Names: Motorcraft™ Accessory Drive Belt, V Belt
Description: Compressor. Without supercharger. Routing:Crk,Tens,Comp,Idler. To 2/15/11. 5.0L. Mustang. 5.2l. Gt350, gt350r. With high output.
Fits:
  • Ford:
    • F-150,
    • Mustang
MSRP $54.18
$34.57

Outer Belt Assembly Screw

Part Number: W505275-S439
Ford Ford
Notes: Included with seat belt assembly.
Other Names: Seat Belt Assembly Bolt, Seat Belt Assembly Screw, Screw
Description: Convertible. Coupe.
Fits:
  • Ford:
    • Explorer,
    • Mustang,
    • Police Interceptor Utility
  • Lincoln:
    • Aviator,
    • Nautilus
MSRP $5.00
$2.93

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Why Choose OEM Belts?

OEM Fitment – Engineered to match factory belt routing and pulley layout. 

Prevents Failures – Avoids sudden loss of charging, cooling, and accessory function. 

Durable Construction – Built with high-strength rubber and internal reinforcements. 

Efficient Operation – Designed for quiet performance and resistance to stretching. 

Easy Installation – Direct bolt-on replacement—no modifications required.

Compatible Ford Mustang Models

Fits 2020 Ford Mustang, including:

  • EcoBoost & EcoBoost Premium (2.3L I4 Turbo)

  • GT & GT Premium (5.0L V8)

  • Bullitt Edition (5.0L V8)

  • Shelby GT500 (5.2L Supercharged V8)

Check engine configuration and accessory setup to ensure correct belt selection.

How to Replace Belts on a 2020 Mustang

Tools Required: 

✔ Serpentine belt tool or breaker bar 

✔ Socket and ratchet set 

✔ Flashlight or work light 

✔ Gloves 

✔ New OEM belt

Installation Steps:

  1. Locate the Belt Routing Diagram under the hood or in the service manual.

  2. Use the Belt Tensioner Tool to release tension.

  3. Remove the Old Belt, inspecting for cracks or glazing.

  4. Route the New Belt along the correct pulley path.

  5. Reapply Tension and check belt alignment.

  6. Start the Engine and observe for smooth, quiet operation.

Pro Tip: Inspect your belt tensioner and idler pulleys while replacing the belt. If noisy or worn, they should be replaced to prevent premature belt wear.

Signs You Need a New Belt

🚙 Squealing or chirping noise when starting or accelerating 

🚙 Cracked, frayed, or shiny (glazed) belt surface 

🚙 Power steering loss, A/C failure, or overheating 

🚙 Battery warning light (alternator not charging) 

🚙 Visible belt slack or slipping

Belt Options for Your 2020 Mustang

🔹 OEM Serpentine Belts – Factory-spec performance and fit 

🔹 Heavy-Duty Performance Belts – Built for higher RPM or high-load applications 

🔹 Accessory Drive Belts – For components with separate belt systems (if applicable)

Popular Related Parts for 2020 Mustang

🔹 2020 Mustang Belt Tensioners – Maintain correct tension and extend belt life 

🔹 2020 Mustang Idler Pulleys – Reduce noise and maintain belt alignment 

🔹 2020 Mustang Water Pumps – Ensure coolant circulation and engine cooling 

🔹 2020 Mustang Alternators – Keep your electrical system fully powered

Get Your 2020 Mustang Belts Today

Don’t wait for a belt failure—replace it with an OEM-quality component designed to deliver quiet, reliable performance for thousands of miles. 

🛒 Upgrade Your Ride 🚙 – Shop Now!

FAQs About 2020 Mustang Belts

❓ How long do belts last on a 2020 Mustang? Typically 60,000 to 100,000 miles, depending on usage and driving conditions.

❓ What happens if the serpentine belt breaks while driving? You may lose power steering, battery charging, engine cooling, and A/C—leading to serious engine damage.

❓ Can I replace the belt myself? Yes—belt replacement is a DIY-friendly job with basic tools and a routing diagram.

❓ Should I replace the tensioner too? Yes—if the tensioner is worn or noisy, it can reduce belt life or cause slippage.

❓ Are aftermarket belts okay? While some are serviceable, OEM belts provide exact fit, quieter operation, and longer durability—especially on high-performance Mustangs.