Gates K030311SF Serpentine Belt - Air Conditioning or Water Pump

OE Stretch Fit Belt for Mazda Applications

The Gates K030311SF is a Premium OE Stretch Fit Micro-V Belt built for stretch-fit accessory drive systems. It uses Gates self-tensioning technology to deliver a precise fit on confirmed Mazda applications, including water pump and air conditioning drives.

Key Features

• Premium OE Stretch Fit Micro-V Belt for stretch-fit drive systems
• 3-rib automotive V-ribbed belt construction
• EPDM belt material for durable accessory drive performance
• Nylon cord reinforcement for stable belt structure
• OE Exact and OE Performance comparison ratings
• Effective length: 31.107 in. (790 mm)
• Outside circumference: 31.83 in. (808 mm)
• Top width: 0.42 in. (11 mm)

Product Details

Gates K030311SF is part of the Premium OE Stretch Fit Micro-V Belt line, which is engineered for vehicles that use a belt installed without a conventional tensioner adjustment. This belt is specified for Mazda CX-30 water pump applications from 2020-2024, Mazda CX-50 air conditioning applications from 2023-2024, and Mazda 3 and Mazda 3 Sport water pump applications across the listed 2019-2022 model years. For Mazda 3 and Mazda 3 Sport fitments, some applications note Mexico-built vehicles and SKYACTV or non-SKYACTV configurations, so the exact vehicle notes should be matched before ordering. This part cross-references 3K311SF and PX1315908 for the same application.

What This Belt Helps Address

• Squealing or slipping from a worn stretch-fit serpentine belt
• Loss of accessory drive performance at the water pump
• Reduced belt grip on stretch-fit pulley systems
• Cracking, glazing, or wear on the existing Micro-V belt
• Incorrect belt length for OE stretch-fit Mazda applications

Installation Notes and Tips

Installation requires a 3 mm zip tie, and Gates includes sheet instructions for the procedure. Because stretch-fit belts are installed on systems without traditional tensioner adjustment, follow the service steps closely and verify pulley routing before final seating. Confirm the vehicle year, model, engine configuration notes, and driven position before installation on Mazda 3, Mazda 3 Sport, CX-30, or CX-50 applications.

Quality Assurance

Gates manufactures this belt as an OE-style replacement for stretch-fit accessory drive systems, with materials and dimensions matched to the listed applications. The Premium OE Stretch Fit Micro-V Belt line is built to support proper fit and function on vehicles that require this specific belt design.