2019 Mustang Belts – OEM Serpentine & Accessory Drive Belts for Reliable Performance

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Power Your Mustang’s Essentials with Confidence

The serpentine and accessory belts on your 2019 Ford Mustang drive critical components like the alternator, power steering pump, air conditioning compressor, and water pump. A worn or cracked belt can lead to power loss, overheating, or breakdown—especially under performance conditions.

These OEM-fit replacement belts offer exact routing and tension for your Mustang’s engine, whether you drive an EcoBoost, GT, or GT350. Built for strength and durability, they’re engineered to keep your car running cool, quiet, and efficient.

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

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

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

AC Belt

Part Number: BR3Z-8620-R
Ford Ford
Other Names: V Belt, jk6342b
Replaces: BR3Z-8620-A, JK6-342
Description: Without supercharger. To 2/15/11. 5.0L. Mustang. 5.2l. Gt350, gt350r. With high output.
Fits:
  • Ford:
    • F-150,
    • Mustang
MSRP $54.18
$34.57

Belt Weather-Strip

Part Number: JR3Z-76297B06-A
Ford Ford
Notes: Included with end cover.
Other Names: Weatherstrip Fixed Glass
Replaces: FR3Z-76297B06-A, FR3Z-76297B06-B
Description: Convertible.
Fits:
  • Ford:
    • Mustang
MSRP $123.08
$85.67

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

Outer Belt Screw***sold individually***

Part Number: W505277-S442
Ford Ford
Notes: Included with outer belt. Included with seat belt assembly.
Other Names: Seat Belt Assembly Bolt, Bumper Screw, Reflector Panel Nut, Hinge Lower Bolt, Seat Belt Lap And Shoulder Belt Bolt, Screw
Description: Coupe. Single rear wheels. Dual rear wheels. Outer belt,screw. Crew cab without inflatable belts.
Fits:
  • Ford:
    • F-150,
    • F-250 Super Duty,
    • F-350 Super Duty,
    • F-450 Super Duty,
    • Mustang,
    • Ranger,
    • Transit-150,
    • Transit-250,
    • Transit-350,
    • Transit-350 HD
  • Lincoln:
    • Nautilus
MSRP $5.00
$2.93

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 – Designed to match factory routing, length, and pulley specs. 

Prevents Failures – Avoids belt slippage, power loss, and overheating issues. 

Durable Construction – Heat-resistant, high-strength rubber with reinforced cores. 

Efficient Operation – Maintains accessory function with minimal noise or friction. 

Easy Installation – Direct bolt-on with no cutting or modification required.

Compatible Ford Mustang Models

Fits 2019 Ford Mustang trims including EcoBoost, GT, Bullitt, and GT350. Designed for both 2.3L EcoBoost and 5.0L V8 engines. Always confirm engine size and accessory layout before ordering.

How to Replace Belts on a 2019 Mustang

Tools Required: 

✔ Serpentine belt tool or long-handled breaker bar 

✔ Socket and ratchet set 

✔ Gloves 

✔ Flashlight or work light 

✔ New OEM belt

Installation Steps:

  1. Locate the Belt Routing Diagram under the hood or in your owner’s manual.

  2. Relieve Belt Tension using the tensioner tool or breaker bar.

  3. Remove the Old Belt, inspecting for wear or damage.

  4. Install the New Belt, carefully following the correct routing path.

  5. Reapply Tension, ensure all grooves are aligned, and verify belt is seated.

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

Pro Tip: While replacing the belt, inspect the belt tensioner and idler pulleys—worn components can cause noise and reduce belt life.

Signs You Need a New Belt

🚙 Squealing or chirping noises at startup or acceleration 

🚙 Cracked, frayed, or shiny belt surface 

🚙 Power steering or A/C loss 

🚙 Engine overheating or battery not charging 

🚙 Visible slack or misalignment in the belt path

Belt Options for Your 2019 Mustang

🔹 OEM Serpentine Belts – Factory-matched for everyday driving and factory accessories 

🔹 Heavy-Duty Belts – Reinforced options for high-performance or track builds 

🔹 Accessory Drive Belts – Engine-specific belts for systems driven separately (varies by trim)

Popular Related Parts for 2019 Mustang

🔹 2019 Mustang Belt Tensioners – Maintain proper belt tension and prevent slippage 

🔹 2019 Mustang Idler Pulleys – Guide belts and reduce vibration 

🔹 2019 Mustang Alternators – Keep your battery charged under all conditions 

🔹 2019 Mustang Water Pumps – Ensure optimal coolant circulation and prevent overheating

Get Your 2019 Mustang Belts Today

Protect your Mustang’s performance and reliability with OEM-fit belts built to last. Whether you’re replacing worn components or upgrading your engine accessories, these belts deliver dependable results. 

🛒 Upgrade Your Ride 🚙 – Shop Now!

FAQs About 2019 Mustang Belts

❓ How long do belts last on a 2019 Mustang? Most belts last 60,000–100,000 miles, but regular inspections are recommended.

❓ What happens if the serpentine belt fails while driving? You’ll lose power to the steering, cooling system, charging system, and A/C—which can lead to engine overheating or shutdown.

❓ Can I replace the belt myself? Yes—it’s a straightforward DIY job with basic tools and the right diagram.

❓ Should I replace the tensioner with the belt? Yes—if the tensioner is worn or noisy, replacing it ensures proper belt performance.

❓ Are aftermarket belts okay to use? OEM belts offer superior fit, performance, and noise control, especially for high-performance engines like the 5.0L V8.