Gates K120905 Serpentine Belt - Fan or Fan and Alternator

Gates Premium OE Micro-V Belt K120905

The Gates K120905 Premium OE Micro-V Belt is a precision-fit serpentine belt built for import and domestic cars and trucks that require OE-style size, construction, and materials. It uses EPDM belt material with a polyester cord for consistent operation in accessory drive systems.

Compatible With vehicles that call for a K-section, 12-rib automotive V-ribbed belt with an effective length of 2300 mm (90.55 in) and an outside circumference of 2315 mm (91.13 in). The Gates K120905 is an OE Performance belt for applications where correct fit and stable belt tracking matter.

Key Features

• Part number: K120905
• Premium OE Micro-V Belt from Gates
• 12-rib automotive V-ribbed belt, standard type
• EPDM belt material for accessory drive service
• Polyester cord construction
• Top width: 42 mm (1.647 in)
• Effective length: 2300 mm (90.55 in)
• Outside circumference: 2315 mm (91.13 in)
• OE Performance rating

Product Details

Gates Micro-V belts are engineered to match OE size, construction, and material requirements for dependable accessory drive operation. This belt is built for vehicles that need a K-section serpentine belt with 12 ribs, helping maintain proper contact across pulleys in the belt drive system. The K120905 part number is also referenced by K120905HD, and it cross-references 12K905 and 25-120905 for the same application.

What This Belt Helps Address

• Squealing or chirping from a worn serpentine belt
• Cracking, glazing, or rib wear on the belt surface
• Loss of proper accessory drive engagement
• Incorrect belt length after service replacement
• Tracking issues caused by an OE-mismatch belt profile

Installation Notes and Tips

Verify the belt routing, rib count, and measured length before installation. Confirm the application uses a K-section, 12-rib belt and compare the old belt’s dimensions to the Gates K120905. Inspect pulleys, tensioners, and idlers for wear before fitting the new belt so the accessory drive system operates correctly.

Quality Assurance

Gates builds this Premium OE Micro-V Belt to OE performance standards for consistent fit and service in import and domestic applications. The OE-style construction supports reliable operation in vehicles that specify this belt profile, including select make/model applications such as Honda Civic and Toyota Camry where the listed belt dimensions match the vehicle requirement.