Dayco 3PK698EE Serpentine Belt - Water Pump

Dayco 3PK698EE Serpentine Belt Overview

The Dayco 3PK698EE is an elastic self-tensioning serpentine belt for select Lexus and Toyota applications. Built with EPDM4 material and a 3-rib K-section profile, it is specified for accessory drive use at the water pump on listed vehicles.

Dayco’s Supersedes E030268 line identifies this belt as the updated replacement for the earlier part number, making 3PK698EE a direct reference point when servicing the accessory drive belt system on the RX450h, RX450hL, and Highlander.

Key Features

• EPDM4 construction for accessory drive durability
• 3-rib K-section design
• Straight rib profile
• Black finish
• Effective length: 698.00 mm (27.480 in.)
• Outside circumference: 712.37 mm (28.046 in.)
• Free length: 680.720 mm (26.8 in.)
• Meets SAE J1459 standards
• Operating temperature range: -45 to 212 degrees

Product Details

This Dayco serpentine belt is engineered for the water pump drive on 2017-2022 Lexus RX450h, 2018-2022 Lexus RX450hL, 2017-2019 Toyota Highlander, and 2016 Lexus RX450h applications listed in the fitment data. The elastic self-tensioning design is used where the vehicle calls for a belt that maintains proper drive tension without a conventional tensioner setup. If you are searching for a Lexus RX450h water pump belt or a Toyota Highlander accessory drive belt, 3PK698EE is the part number to verify against the vehicle’s original specification.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Belt Helps Address

• Water pump drive belt replacement on listed Lexus and Toyota models
• Noise caused by a worn, glazed, or cracked serpentine belt
• Loss of proper belt tension in elastic self-tensioning systems
• Accessory drive wear from age, heat, and mileage
• Fitment verification when replacing superseded part E030268

Installation Notes

Confirm the vehicle’s belt routing and original part number before installation. This belt is specified for the water pump position on the listed Lexus RX450h and RX450hL applications, and for the fitment shown on Toyota Highlander and Lexus RX450h models. Inspect pulleys and related accessory drive components for wear before installing the new belt, and verify that the belt sits correctly in the rib grooves after installation.

Quality Assurance

Dayco manufactures this belt to SAE J1459 standards and uses EPDM4 material for consistent performance in the stated temperature range. The 3PK698EE part number supersedes E030268, which helps simplify replacement selection for the correct Lexus RX450h, Lexus RX450hL, and Toyota Highlander application.