Gates K120876 serpentine belt for the 2025 Western Star 49X 6-cylinder 14.9L and other vehicles drives the fan, alternator and water pump from the engine. This Gates Micro-V serpentine belt meets or exceeds all specifications from the Original Equipment Manufacturer.
- Gates Micro-V precision-fit belt with 12 ribs
- Special construction eliminates belt noise and reduces tension loss
- EPDM rubber construction resists cracking on the rib surface
- Polyester cord material
Quick facts
- Part: Gates K120876 serpentine belt
- Fits: 2025 Western Star 49X 6-cylinder 14.9L and other vehicles
- Position: fan and alternator, fan, alternator and water pump
- Material: EPDM
- Condition: New
Cracks or fraying across the ribs, a glazed surface or squealing can mean the belt is worn. A weak tensioner, a misaligned pulley or a worn alternator or water pump bearing can be behind these signs too, so find the cause before buying a belt. Replacing the tensioner is recommended when the vehicle has one.
Fits
This belt fits the 2019 International Lonestar 6-cylinder 15.0L, the 2019-2021 Lonestar 6-cylinder 14.9L and the 2018-2021 International HX520 6-cylinder 14.9L, and more vehicles beyond them. If your vehicle is not named here, look up your year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: fan and alternator, fan, alternator and water pump
- Quantity per vehicle: 1
- Cross section: K
- Rib count: 12
- Top width: 42 mm (1.647 in)
- Outside circumference: 2239 mm (88.13 in)
- Effective length: 2225 mm (87.6 in)
Build and materials
- Type: Automotive V-Ribbed Belt (Standard)
- Material: EPDM
- Cord material: polyester
- Grade type: OE Performance
- Condition: New
- Country of origin: Mexico
In the box
One serpentine belt. This listing is one belt, and each vehicle takes one.
Interchange: 25-120876 · 25-120876HD
12K876 · K120876HD · 2893581 · 5120876 · 0135632225 · 1120876 · 3998046C1 · 4038724C1 · 4038724C2 · 12PK2222 · 12PK2223 · 12PK2224 · 12PK2225 · 12PK2226 · 12PK2227
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
12K876, K120876HD, 2893581, 5120876, 0135632225, 1120876, 3998046C1, 4038724C1, 4038724C2, 12PK2222, 12PK2223, 12PK2224, 12PK2225, 12PK2226, 12PK2227, 25-120876, 25-120876HD, K120876
Frequently Asked Questions
Does the Gates K120876 fit the 2019 International Lonestar 6-cylinder 15.0L?
Yes, Gates K120876 fits the 2019 International Lonestar 6-cylinder 15.0L and the 2019-2021 Lonestar 6-cylinder 14.9L. Other vehicles are listed in the "Vehicles it fits" section.
How long and how wide are Gates drive belts like the K120876?
Gates K120876 measures 2239 mm (88.13 in) around the outside and 2225 mm (87.6 in) effective length. It is 42 mm wide at the top with 12 ribs.
Is this Gates alternator belt also used to drive the water pump?
Yes. Gates K120876 is listed for the fan and alternator, the fan, and the alternator and water pump positions, and each vehicle takes one belt.
What signs can show this serpentine belt is worn?
Cracks or fraying across the ribs, a glazed surface and squealing can mean wear. Inspect it only with the engine off and cool; a shop can test tension and pulley condition.
Are these Gates ribbed belts made from EPDM rubber?
Yes. Gates K120876 is made of EPDM with a polyester cord, and the rubber resists cracking on the rib surface.
