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Toyota CVT Hiss Noise: Valve Body Replacement

This Toyota Technical Service Bulletin (T-SB-0016-19) addresses a high-pitched hiss or whine noise in the Continuously Variable Transaxle (CVT) of specific Toyota vehicles, typically occurring after reaching normal operating temperature. The issue is linked to the CVT valve body plate.

The bulletin provides detailed diagnostic and repair procedures for 2014-2018 Toyota Corolla and 2017-2018 Toyota iM models equipped with the K313 CVT. It covers identifying affected vehicles via serial numbers or VINs and outlines the step-by-step process for valve body replacement, including necessary parts and torque specifications.

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