Restore factory reliability with the Motorcraft OEM Serpentine Belt (3C3Z-8620-DB / JK8-1267-A), the genuine replacement accessory drive belt engineered specifically for 2003-2007 Ford 6.0L Powerstroke Diesel engines equipped with a single alternator. Designed and manufactured to Ford's exact specifications, this belt delivers the precise fit, proper length, and long-lasting durability required to keep your engine accessories operating at peak performance.
The serpentine belt is responsible for driving critical engine components including the alternator, water pump, power steering pump, and A/C compressor. A worn, cracked, or stretched belt can lead to squealing noises, charging system failures, overheating, steering issues, or complete belt failure. Replacing your belt with a genuine Motorcraft unit ensures factory-level performance and dependable operation under everyday driving, towing, and heavy-duty work conditions.
Motorcraft belts feature high-strength polyester cords to minimize stretching, multi-layer EPDM construction for extended service life, and precision-molded ribs that provide superior grip while reducing noise and slippage. The OEM design also ensures quick installation without the fitment issues commonly found with lower-quality aftermarket belts.
Whether you're performing preventative maintenance or replacing a worn accessory drive belt, this genuine Motorcraft serpentine belt is the trusted choice for maintaining your 6.0L Powerstroke's reliability.
Features & Benefits
- Genuine Motorcraft OEM replacement
- Direct replacement for Ford part number 3C3Z-8620-DB
- Motorcraft belt number JK8-1267-A
- Designed for single alternator equipped engines
- Premium EPDM rubber construction for maximum durability
- High-strength polyester cords resist stretching
- Precision molded ribs reduce slipping and belt noise
- OEM fit for fast, hassle-free installation
- Maintains proper accessory drive performance
- Ideal for stock daily drivers, work trucks, and towing applications
Vehicle Fitment
Ford Super Duty
- 2003-2007 F-250 6.0L Powerstroke Diesel
- 2003-2007 F-350 6.0L Powerstroke Diesel
- 2003-2007 F-450 6.0L Powerstroke Diesel
- 2003-2007 F-550 6.0L Powerstroke Diesel
Ford Excursion
- 2003-2005 6.0L Powerstroke Diesel
Note: Fits single alternator applications only. Dual alternator trucks require a different belt.
Replaces Part Numbers
- Motorcraft JK8-1267-A
- Ford 3C3Z-8620-DB
