Gates K070365EST Serpentine Belt - Alternator or Water Pump

Gates E-Start Serpentine Belt for Stop-Start Systems

The Gates K070365EST is an OE Exact serpentine belt built for accessory drive systems that use start-stop technology. It serves as a belt-driven starter generator belt for smoother operation, improved fuel efficiency, and reduced noise in the accessory drive system.

Compatible With 2018 Buick LaCrosse, water pump and 2019 Buick LaCrosse, alternator applications, this Gates Automotive V-Ribbed Belt (E-Start) is built to match the specified OE-style dimensions and rib profile. The K070365EST is a direct-fit option for drivers searching for a 7-rib serpentine belt for Buick LaCrosse start-stop accessory drive service.

Key Features

• Part number: K070365EST
• Gates Automotive V-Ribbed Belt (E-Start) for stop-start accessory drive systems
• OE Exact comparison rating for specified applications
• 7-rib design for proper pulley engagement
• EPDM belt material for durability in modern engine bays
• Aramid cord reinforcement for strength and dimensional stability
• Top width: 24 mm (.947 in)
• Effective length: 928 mm (36.54 in)
• Outside circumference: 942 mm (37.1 in)

Product Details

Gates E-Start Micro-V belts are engineered for belt-driven starter generator systems used in stop-start vehicles. This design supports the accessory drive while helping the engine restart smoothly after shutdown events. The K070365EST uses a K-section profile, 7 ribs, EPDM construction, and aramid cord reinforcement to maintain consistent belt tracking and fitment in the specified Buick LaCrosse applications. If you are replacing a serpentine belt on a 2018 Buick LaCrosse water pump drive or a 2019 Buick LaCrosse alternator drive, this part number provides the listed OE-style dimensions and configuration.

This part cross-references 7K365EST and 7PK928 for the same application.

What It Helps Address

• Squealing or chirping from a worn serpentine belt
• Cracking, glazing, or fraying on the accessory drive belt
• Incorrect belt length or rib count during replacement
• Loss of proper pulley engagement on stop-start systems
• Noise or inconsistent operation in the alternator or water pump drive

Installation Notes and Tips

Verify the belt routing and pulley alignment before installation. Confirm the 7-rib, 24 mm top width, and 928 mm effective length match the vehicle’s specified application before service. Inspect related pulleys and tensioner components for wear, since belt condition and drive alignment work together in the accessory drive system. For Buick LaCrosse service, confirm whether the vehicle uses the alternator or water pump application listed for your model year.

Quality Assurance

Gates is a recognized supplier of OE-style belt drive components, and the K070365EST is listed with an OE Exact comparison rating for the specified fitments. Its EPDM belt construction and aramid cord reinforcement support consistent performance in modern accessory drive systems.