What is the purpose of the self-adjusting serpentine Serpentine Belt in Ford Mustang and how should it be inspected and replaced?

Accessory components like alternators, power steering pumps, water pumps, and air conditioning compressors in vehicles are powered by a self-adjusting serpentine Serpentine Belt. The belt should be checked regularly since its lifespan is 100000 miles. To check it open the hood, and look for the front engine belt and you will see cracks, separation, fraying, or glazing on both sides with your eyes. Replace the belt if it is found out that it falls outside this range. Replace, and rotate the tensioner to release tension, remove the old belt and route the new one over pulleys then release the tensioner. For air conditioning compressor Serpentine Belts in 2011 and later models, a stretchy belt design is used that requires engine rotation and insertion of a flexible material to remove or install them.

Genuine Ford Mustang Serpentine Belt

Drive Belt

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70 Serpentine Belts found

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Ford Mustang A/C Belt
Part Number: BR3Z-8620-R
$29.96 MSRP: $48.55
You Save: $18.59 (39%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: V-Belt; AC Belt
- Replaces: BR3Z-8620-A, JK6-342
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2020 Ford Mustang | 4 Cyl 2.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.0L DOHC EFI Modular, 8 Cyl 5.0L MOD DOHC SEFI NA, 8 Cyl 5.2 L GAS, 8 Cyl 5.2L | 10-Speed Automatic Transmission (10R80), 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission (T56), 6-Speed Manual Transmission-3160, 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang Serpentine Belt
Part Number: FR3Z-8620-B
$38.05 MSRP: $61.64
You Save: $23.59 (39%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Serpentine Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2023 Ford Mustang | 4 Cyl 2.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.0L DOHC EFI Modular, 8 Cyl 5.0L MOD DOHC SEFI NA, 8 Cyl 5.2 L GAS, 8 Cyl 5.2L | 10-Speed Automatic Transmission (10R80), 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission-3160, 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang Serpentine Belt - 5.0L
Part Number: BR3Z-8620-D
$33.22 MSRP: $53.82
You Save: $20.60 (39%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: AC Belt, Serpentine Belt
- Manufacturer Note: Main Drive Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2014 Ford Mustang | 8 Cyl 5.0L MOD DOHC SEFI NA | 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission (T56), 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang A/C Belt
Part Number: BR3Z-8620-B
$25.60 MSRP: $41.45
You Save: $15.85 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: V-Belt; AC Belt
- Manufacturer Note: For In Dealership Repairs Only
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2014 Ford Mustang | 6 Cyl 3.7L PFI NA | 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission (T56), 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang A/C Belt
Part Number: FR3Z-8620-A
$20.20 MSRP: $32.73
You Save: $12.53 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: V-Belt; AC Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2023 Ford Mustang | 4 Cyl 2.3 L GAS, 4 Cyl 2.3L TIVCT DI TC, 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS | 10-Speed Automatic Transmission (10R80), 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission-3160, 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang V-Belt
Part Number: BR3Z-8620-Q
$32.16 MSRP: $45.64
You Save: $13.48 (30%)
ADD TO CART
Product Specifications
- Other Name: Serpentine Belt
- Manufacturer Note: Belt Kit; Contains Instruction Sheet For Outside Customer Sales.
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2019 Ford Mustang | 6 Cyl 3.7L PFI NA | 10-Speed Automatic Transmission (10R80), 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission-3160, 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang A/C Belt
Part Number: JR3Z-8620-A
$38.05 MSRP: $61.64
You Save: $23.59 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: V-Belt; AC Belt
- Manufacturer Note: Air Conditioning Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2025 Ford Mustang | 4 Cyl 2.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.0L DOHC EFI Modular, 8 Cyl 5.0L MOD DOHC SEFI NA, 8 Cyl 5.2 L GAS | 10-Speed Automatic Transmission (10R80), 6-Speed Manual Transmission-3160, 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang Serpentine Belt
Part Number: BR3Z-8620-E
$39.50 MSRP: $64.00
You Save: $24.50 (39%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Serpentine Belt
- Manufacturer Note: Main Drive Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2014 Ford Mustang | 8 Cyl 4.6L SOHC EFI, 8 Cyl 5.4L DOHC EFI S/C ALUM, 8 Cyl 5.8L DOHC SC | 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission (T56), 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang A/C Belt
Part Number: DR3Z-8620-B
$75.76 MSRP: $101.64
You Save: $25.88 (26%)
ADD TO CART
Product Specifications
- Other Name: Belt; AC Belt
- Manufacturer Note: For Super Charger And Air Conditioning Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2014 Ford Mustang | 8 Cyl 4.6L SOHC EFI, 8 Cyl 5.8L DOHC SC | 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission (T56), 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang Serpentine Belt - 2.3L
Part Number: FR3Z-8620-C
$29.99 MSRP: $48.91
You Save: $18.92 (39%)
ADD TO CART
Product Specifications
- Other Name: Serpentine Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2023 Ford Mustang | 4 Cyl 2.3 L GAS, 4 Cyl 2.3L TIVCT DI TC, 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS | 10-Speed Automatic Transmission (10R80), 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission-3160, 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang Serpentine Belt - 4.0L
Part Number: AR3Z-8620-A
$39.74 MSRP: $64.36
You Save: $24.62 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Serpentine Belt
- Replaces: 5R3Z-8620-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2010 Ford Mustang | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Manual Transmission T5OD, 5-Speed Manual Transmission TR3650, 6-Speed Manual Transmission (T56), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang Serpentine Belt - 4.6L
Part Number: AR3Z-8620-B
$49.17 MSRP: $79.64
You Save: $30.47 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Serpentine Belt
- Replaces: 9R3Z-8620-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2010 Ford Mustang | 8 Cyl 4.6L SOHC EFI, 8 Cyl 5.8L DOHC SC | 5-Speed Automatic Transmission 5R55S, 5-Speed Manual Transmission T5OD, 5-Speed Manual Transmission TR3650, 6-Speed Manual Transmission (T56), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang V-Belt
Part Number: 5R3Z-8620-AA
$39.74 MSRP: $64.36
You Save: $24.62 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaced by: AR3Z-8620-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2010 Ford Mustang | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Manual Transmission T5OD, 5-Speed Manual Transmission TR3650, 6-Speed Manual Transmission (T56), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Mustang A/C Belt
Part Number: KR3Z-8620-A
$67.34 MSRP: $109.09
You Save: $41.75 (39%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: V-Belt; AC Belt, Supercharger Belt
- Manufacturer Note: A/C Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2022 Ford Mustang | 4 Cyl 2.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS
View related parts
Ford Mustang V-Belt
Part Number: BR3Z-8620-BA
$23.79 MSRP: $38.55
You Save: $14.76 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Serpentine Belt - 3.7L
- Manufacturer Note: Belt Kit; Contains Instruction Sheet For Outside Customer Sales.
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2014 Ford Mustang | 6 Cyl 3.7L PFI NA | 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission (T56), 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Mustang V-Belt
Part Number: BR3Z-8620-A
$29.96 MSRP: $48.55
You Save: $18.59 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: Air Conditioning Belt
- Replaced by: BR3Z-8620-R
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2014 Ford Mustang | 8 Cyl 5.0L DOHC EFI Modular, 8 Cyl 5.0L MOD DOHC SEFI NA | 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission (T56), 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Mustang V-Belt
Part Number: 7R3Z-8620-C
$44.12 MSRP: $71.45
You Save: $27.33 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaced by: 7R3Z-8620-D
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2008 Ford Mustang | 8 Cyl 4.6L SOHC EFI, 8 Cyl 5.8L DOHC SC | 5-Speed Automatic Transmission 5R55S, 5-Speed Manual Transmission T5OD, 5-Speed Manual Transmission TR3650, 6-Speed Manual Transmission (T56), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Mustang Serpentine Belt - 3.7L
Part Number: BR3Z-8620-C
$24.13 MSRP: $39.09
You Save: $14.96 (39%)
ADD TO CART
Product Specifications
- Other Name: Serpentine Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011 Ford Mustang | 6 Cyl 3.7L PFI NA | 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission (T56), 6-Speed Manual Transmission-MT82, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Mustang Serpentine Belt - 5.2L
Part Number: KR3Z-8620-B
$31.65 MSRP: $51.27
You Save: $19.62 (39%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Serpentine Belt
- Manufacturer Note: Alternator & Water Pump Belt
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2022 Ford Mustang | 4 Cyl 2.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS
View related parts
Ford Mustang Serpentine Belt
Part Number: E7PZ-8620-B
$5.51 MSRP: $8.18
You Save: $2.67 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Serpentine Belt
- Replaces: F37Z-8620-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1985-1989 Ford Mustang | 4 Cyl 2.3L, 6 Cyl 3.8L, 8 Cyl 5.0L | 3AT C3, 3AT C5, 4AT A4LD, 4AT AOD, 4MT, 5MT

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Ford Mustang Serpentine Belt

Serpentine Belt is one of the critical parts that are very essential in the functionality of the Ford Mustang vehicles. This single continuous belt does an excellent job of driving power from the engine to necessary parts like the alternator, power steering pump, air conditioning compressor, and water pump. Thus, Ford Mustang models have improved mechanical efficiency as compared to earlier many-belt systems, which are important for the proper operation of the vehicle. This Serpentine Belt fits a series of Mustang generations, meaning that clients can always trust its reliability and efficiency. In addition to increasing the effectiveness of the Ford Mustang, a properly serviced serpentine belt is also a safety feature since failed belts may lead to engine overheating or loss of power steering. More to it, the Serpentine Belt is made from better materials to ensure that it does not degrade easily thus making it have a competitive edge in the market. This makes the Ford Mustang to sustain high temperature and stress to perform in the manner that enthusiasts put it in. The mustang's performance, safety and reliability claims are captured in this passage by stressing on the importance of regularly inspecting the serpentine belt and replacing it as soon as possible, for it contributes to the effectiveness of the great American car.

We provide a wide range of Ford Mustang Serpentine Belt at the optimal prices. If you need Ford Mustang Serpentine Belt, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your doorstep with a fast delivery service.

Ford Mustang Serpentine Belt Parts Questions & Experts Answers

V-Belt
4R3Z-8620-EA
Q:
What is the purpose of the self-adjusting serpentine Serpentine Belt in Ford Mustang and how should it be inspected and replaced?
Posted by Kelby C.
A:
Accessory components like alternators, power steering pumps, water pumps, and air conditioning compressors in vehicles are powered by a self-adjusting serpentine Serpentine Belt. The belt should be checked regularly since its lifespan is 100000 miles. To check it open the hood, and look for the front engine belt and you will see cracks, separation, fraying, or glazing on both sides with your eyes. Replace the belt if it is found out that it falls outside this range. Replace, and rotate the tensioner to release tension, remove the old belt and route the new one over pulleys then release the tensioner. For air conditioning compressor Serpentine Belts in 2011 and later models, a stretchy belt design is used that requires engine rotation and insertion of a flexible material to remove or install them.
Answered by Ford Parts Specialist John / Apr 12, 2025