Gates K040335SF Serpentine Belt - Air Conditioning

OE Stretch Fit Belt for Accessory Drive Systems

The Gates K040335SF is a Premium OE Stretch Fit Micro-V Belt built for accessory drive systems that use a self-tensioning belt design. It is made for direct replacement on select Ford and Lincoln air conditioning applications, including Bronco Sport, Edge, Escape, Corsair, and Nautilus models.

Gates Micro-V Stretch Fit belts use self-tensioning technology to install on stretch-fit drive systems and maintain proper belt performance once in service. The K040335SF is an OE Exact and OE Performance replacement for vehicles that require a 4-rib, K-section belt with a special installation tool.

• Premium OE Stretch Fit Micro-V Belt for air conditioning drive applications
• OE Exact and OE Performance comparison rating
• 4-rib, K-section automotive V-ribbed belt
• EPDM belt material with nylon cord reinforcement
• Effective length: 33.56 in. / 852 mm
• Outside circumference: 34.28 in. / 871 mm
• Special installation tool required

Product Details and Fitment

Gates K040335SF is engineered for stretch-fit accessory drive systems where belt length and tension are controlled by the system design rather than a conventional tensioner. This makes it a direct service part for air conditioning drive applications on 2019-2024 Ford Edge, 2021-2024 Ford Bronco Sport, 2021-2024 Ford Escape, 2020-2024 Lincoln Corsair, and 2019-2024 Lincoln Nautilus, with fitment notes that call for an installation tool and, on some applications, no dual set of injectors.

This part cross-references 4K335SF and K2GZ 8620 CA for the same application.

What This Belt Helps Address

• Squealing or slipping from a worn stretch-fit accessory belt
• Loss of proper drive engagement for the air conditioning system
• Cracking, glazing, or fraying on an aging Micro-V belt
• Incorrect belt length on OE stretch-fit applications
• Service issues caused by using a non-matching belt profile

Installation Notes

Use the specified special installation tool for proper fitment on stretch-fit systems. Follow the included Sheet B instructions during installation, and verify the belt routing and application notes before starting service. Because this is a stretch-fit design, correct installation procedure is important for belt seating and long-term performance.

Quality Assurance

Gates positions the Micro-V Stretch Fit line for OE-style service on unique stretch-fit drive systems, with coverage aimed at applications that require exact belt length and profile control. The K040335SF is built as an OE Exact and OE Performance replacement for the listed Ford and Lincoln vehicles.