2021 Mustang Belts – OEM Serpentine & Accessory Belts for Smooth, Reliable Operation

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Keep Your Mustang's Engine Running Strong

The belts in your 2021 Ford Mustang drive essential systems like the alternator, A/C compressor, water pump, and power steering. If your belt is squealing, cracked, or slipping, it’s time to replace it before it causes a loss of function or leaves you stranded.

These OEM-spec serpentine and accessory belts are built to match your Mustang’s engine layout and accessory routing—whether you're in a 2.3L EcoBoost, 5.0L GT, or 5.2L GT500. They deliver long-lasting durability, silent operation, and perfect fit.

Serpentine Belt

Part Number: FR3Z-8620-B
Ford Ford
Other Names: V Belt, jk6682
Description: Mustang. 5.0l. Without supercharger. Mustang. 5.2l. Gt350, gt350r.
Fits:
  • Ford:
    • Mustang
MSRP $54.91
$35.03

Belt Cover

Part Number: JR3Z-6360262-AA
Ford Ford
Other Names: Cover Seat Belt Upper
Description: Coupe.
Fits:
  • Ford:
    • Mustang
MSRP $26.13
$18.35

AC Belt

Part Number: FR3Z-8620-A
Ford Ford
Other Names: V Belt, jk4331
Description: Mustang. 2.3l.
Fits:
  • Ford:
    • Mustang
MSRP $29.45
$18.95

Supercharger Belt

Part Number: KR3Z-8620-A
Ford Ford
Other Names: Supercharger Belt, V Belt, jk8711
Description: With supercharger. Mustang. 5.2l (gt500).
Fits:
  • Ford:
    • Mustang
MSRP $100.00
$63.80

Serpentine Belt

Part Number: KR3Z-8620-B
Ford Ford
Other Names: V Belt, jk4682
Description: Mustang. 5.2l. Gt500. With supercharger.
Fits:
  • Ford:
    • Mustang
MSRP $53.82
$34.34

Serpentine Belt

Part Number: FR3Z-8620-C
Ford Ford
Other Names: V Belt, jk4534
Description: Mustang. 2.3l.
Fits:
  • Ford:
    • Mustang
MSRP $56.73
$36.19

AC Belt

Part Number: JR3Z-8620-A
Ford Ford
Other Names: V Belt, jk6295
Description: 5.0L. Manual transmission.
Fits:
  • Ford:
    • Mustang
MSRP $64.73
$41.30

Belt Weather-Strip

Part Number: FR3Z-6321452-F
Ford Ford
Other Names: Weatherstrip Assembly Door Window
Replaces: FR3Z-6321452-B, FR3Z-6321452-D
Description: Bright.
Fits:
  • Ford:
    • Mustang
MSRP $176.30
$122.70

Seat Belt Assembly

Part Number: JR3Z-63611B08-AE
Ford Ford
Other Names: Lap & Shoulder Belt, Pre-tensioner Seat Belt Buckl
Description: Mustang. Front. Right. Coupe.
Fits:
  • Ford:
    • Mustang
MSRP $401.35
$279.34

Seat Belt Assembly

Part Number: JR3Z-63611B09-AE
Ford Ford
Other Names: Lap & Shoulder Belt, Pre-tensioner Seat Belt Buckl
Description: Mustang. Front. Left. Coupe.
Fits:
  • Ford:
    • Mustang
MSRP $403.27
$280.67

Belt Weather-Strip

Part Number: FR3Z-6321456-B
Ford Ford
Other Names: Weatherstrip Door Belt
Replaces: FR3Z-6321456-A
Fits:
  • Ford:
    • Mustang
MSRP $123.33
$85.84

Belt Weather-Strip

Part Number: FR3Z-6321457-B
Ford Ford
Other Names: Weatherstrip Door Belt
Replaces: FR3Z-6321457-A, FR3Z-6321457-C
Fits:
  • Ford:
    • Mustang
MSRP $123.33
$85.84
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Why Choose OEM Belts?

OEM Fitment – Matches factory routing, tension, and pulley design. 

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

Durable Construction – Made from heat- and wear-resistant rubber with reinforced cores. 

Efficient Operation – Runs quietly under load and resists cracking or stretching. 

Easy Installation – Direct replacement with no modifications required.

Compatible Ford Mustang Models

Fits 2021 Ford Mustang, including:

  • EcoBoost / EcoBoost Premium (2.3L Turbo I4)

  • GT / GT Premium / Mach 1 (5.0L V8)

  • Shelby GT500 (5.2L Supercharged V8)

Confirm engine and accessory layout to ensure correct belt selection.

How to Replace Belts on a 2021 Mustang

Tools Required: 

✔ Serpentine belt tool or long-handled 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 on the existing belt.

  3. Remove the Old Belt, inspecting for wear, cracks, or fraying.

  4. Route the New Belt according to the factory layout.

  5. Reapply Tension, double-check alignment, and ensure it's fully seated.

  6. Start the Engine to verify quiet, stable operation.

Pro Tip: Always check your belt tensioner and idler pulleys while replacing belts. Worn components can shorten belt life and create noise.

Signs You Need a New Belt

🚙 Squealing or chirping on startup or acceleration 

🚙 Cracked or glazed belt surface 

🚙 Loss of power steering, alternator function, or engine cooling 

🚙 Battery warning light 

🚙 Slack or visible misalignment in the belt path

Belt Options for Your 2021 Mustang

🔹 OEM Serpentine Belts – Quiet, factory-fit belts for daily driving and stock setups 

🔹 Heavy-Duty Performance Belts – Reinforced for high-RPM or high-output engines 

🔹 Accessory Belts – Engine-specific options for multi-belt configurations

Popular Related Parts for 2021 Mustang

🔹 2021 Mustang Belt Tensioners – Maintain proper belt pressure and alignment 

🔹 2021 Mustang Idler Pulleys – Guide belt movement and reduce friction 

🔹 2021 Mustang Alternators – Ensure reliable charging across all driving conditions 

🔹 2021 Mustang Water Pumps – Keep your engine running cool under load

Get Your 2021 Mustang Belts Today

Don’t wait for a belt failure to interrupt your ride—replace worn belts with OEM-quality parts built for strength, precision, and long-term performance. 

🛒 Upgrade Your Ride 🚙 – Shop Now!

Chevrolet Silverado 1500 Brake Pads - FAQs

FAQs About Chevrolet Silverado 1500 Brake Pads

  • How often should I replace my Silverado 1500 brake pads?

    Brake pads typically last between 30,000 and 70,000 miles, depending on driving habits, terrain, and towing frequency.

  • What are the best brake pads for towing with a Silverado 1500?

    Semi-metallic or performance brake pads are ideal for towing as they offer higher friction and heat resistance.

  • Do I need to replace my brake rotors when changing brake pads?

    Not always, but if your rotors are worn, grooved, or warped, it’s recommended to replace them for optimal braking performance.

  • Can I install Silverado brake pads myself, or should I take it to a shop?

    With basic mechanical skills and the right tools, you can install them yourself. However, professional installation is recommended for those unfamiliar with brake systems.

  • Are ceramic or semi-metallic brake pads better for my Silverado 1500?
    • Ceramic brake pads: Best for daily driving, low dust, and quiet performance.
    • Semi-metallic brake pads: Ideal for heavy-duty use, towing, and high-performance driving.