Gates K030309SF Serpentine Belt - Water Pump

OE Stretch Fit Belt for Mazda Water Pump Drives

The Gates K030309SF is a Premium OE Stretch Fit Micro-V Belt built for Mazda water pump applications that use a stretch-fit drive system. It uses Gates self-tensioning technology to help the belt install correctly and maintain proper operation on the intended accessory drive setup.

For Mazda CX-3, Mazda 3, Mazda 3 Sport, and Mazda CX-5 water pump service, this Gates Micro-V Stretch Fit Belt is built with EPDM belt material, a nylon cord, and a 3-rib V-ribbed profile. The K030309SF is an OE Exact and OE Performance replacement for stretch-fit applications that require a special installation tool.

Key Features

• Premium OE Stretch Fit Micro-V Belt for stretch-fit accessory drive systems
• Gates self-tensioning design for proper fit on the intended application
• EPDM belt material for durability in automotive belt service
• Nylon cord construction for strength and stability
• 3-rib, K-section V-ribbed belt profile
• Effective length: 30.98 in. / 787 mm
• Outside circumference: 31.5 in. / 800 mm
• OE Exact and OE Performance comparison ratings

Detailed Description

Gates K030309SF is a stretch-fit serpentine belt engineered for Mazda water pump drives that specify a Micro-V belt with no conventional tensioner adjustment. The Premium OE Stretch Fit Micro-V Belt line is built around Gates’ self-tensioning approach, which helps the belt seat correctly on unique stretch-fit systems. This part number is commonly searched as a Mazda 3 water pump belt, Mazda CX-3 water pump belt, or Mazda CX-5 water pump belt, and it is also referenced as K030309SF for catalog lookup.

This part cross-references Continental 4030317S and Dayco E030305 for the same application.

What It Helps Address

• Water pump belt noise from a worn or stretched belt
• Loss of proper belt tension on stretch-fit drive systems
• Cracking, glazing, or rib wear on the existing Micro-V belt
• Incorrect belt fitment on Mazda SKYACTIV water pump applications
• Service replacement for a belt that no longer tracks correctly

Installation Notes and Tips

Installation requires a special installation tool, and the fitment notes call for a 3mm zip tie during installation on listed Mazda applications. Follow the Sheet B instructions included with the belt and verify the routing before final installation. Confirm the vehicle application carefully for Mazda CX-3, Mazda 3, Mazda 3 Sport, and Mazda CX-5 water pump service before ordering the K030309SF.

Quality Assurance

Gates supplies OE-style belt solutions for stretch-fit drive systems, and this Premium OE Stretch Fit Micro-V Belt is built to OE Exact and OE Performance standards for the listed applications. The K030309SF is made for the specified Mazda water pump fitments and is backed by Gates’ product engineering for automotive belt service.