How to service the accessory drive belt on a 3.8L engine on 2003 Ford Mustang?

Starting the service of an accessory drive belt on a 3.8L engine requires turning the drive belt tensioner counterclockwise to remove the drive belt. The drive belt installation needs correct positioning on all pulleys before reassembly. The procedure for new belt installation requires reversing the removal steps while maintaining proper accessory drive route.

OEM 2003 Ford Mustang Drive Belt

Serpentine Belt

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2003 Ford Mustang Serpentine Belt
Part Number: 3R3Z-8620-AB
$29.08 MSRP: $46.18
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Product Specifications
- Other Name: V-Belt; Serpentine Belt Drive Kit; Drive Belt
- Replaces: XR3Z-8620-DC, JK6-1001-AA, XR3Z-8620-DA
- Base No.: 8620
- Item Weight: 0.70 Pounds
- Item Dimensions: 6.3 x 1.0 x 3.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 3R3Z-8620-AB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
More Info
Fits the following 2003 Ford Mustang Submodels:
- Base | 6 Cyl 3.8 L GAS, 6 Cyl 3.9 L GAS
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2003 Ford Mustang Drive Belt
Part Number: 2R3Z-8620-BC
Product Specifications
- Other Name: V-Belt; Accessory Drive Belt; Serpentine Belt
- Base No.: 8620B
- Item Weight: 1.00 Pounds
- Item Dimensions: 6.1 x 1.0 x 3.3 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 2R3Z-8620-BC
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
More Info
Fits the following 2003 Ford Mustang Submodels:
- GT, Mach 1, SVT Cobra, SVT Cobra 10th Anniversary | 8 Cyl 4.6 L GAS
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2003 Ford Mustang Serpentine Belt
Part Number: 2R3Z-8620-AC
Product Specifications
- Other Name: V-Belt; Serpentine Belt Drive Kit; Accessory Drive Belt; Drive Belt
- Base No.: 8620A
- Item Weight: 0.80 Pounds
- Item Dimensions: 6.2 x 1.0 x 3.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 2R3Z-8620-AC
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
More Info
Fits the following 2003 Ford Mustang Submodels:
- SVT Cobra, SVT Cobra 10th Anniversary | 8 Cyl 4.6 L GAS
View related parts
2003 Ford Mustang Serpentine Belt
Part Number: 1R3Z-8620-BA
Product Specifications
- Other Name: V-Belt; Serpentine Belt Drive Kit; Accessory Drive Belt; Drive Belt
- Replaces: XR3Z-8620-HA
- Base No.: 8620
- Item Weight: 0.70 Pounds
- Item Dimensions: 6.3 x 1.0 x 3.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 1R3Z-8620-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
More Info
Fits the following 2003 Ford Mustang Submodels:
- Base, GT, GT Bullitt, Mach 1, SVT Cobra, SVT Cobra 10th Anniversary | 6 Cyl 3.8 L GAS, 8 Cyl 4.6 L GAS
View related parts
2003 Ford Mustang Serpentine Belt
Part Number: 1R3Z-8620-DA
Product Specifications
- Other Name: V-Belt; Serpentine Belt Drive Kit; Drive Belt
- Base No.: 8620
- Item Weight: 0.60 Pounds
- Item Dimensions: 6.3 x 1.1 x 3.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 1R3Z-8620-DA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
More Info
Fits the following 2003 Ford Mustang Submodels:
- GT | 8 Cyl 4.6 L GAS

2003 Ford Mustang Drive Belt

If you're seeking quality and affordability, look no further than our extensive inventory of genuine 2003 Ford Mustang Drive Belt available at FordPartsDeal.com. You can confidently purchase our OEM 2003 Ford Mustang Drive Belt as they are supported by the manufacturer's warranty and our hassle-free return policy, alongside the benefit of our fast delivery service.

2003 Ford Mustang Drive Belt Parts Questions & Experts Answers

Q: How to service the accessory drive belt on a 3.8L engine on 2003 Ford Mustang?
A: Starting the service of an accessory drive belt on a 3.8L engine requires turning the drive belt tensioner counterclockwise to remove the drive belt. The drive belt installation needs correct positioning on all pulleys before reassembly. The procedure for new belt installation requires reversing the removal steps while maintaining proper accessory drive route.