2023 Toyota bZ4X, Corolla, Corolla Hatchback, Corolla HV, and Crown Audio Head Unit Software Update (Denso-Ten) Technical Service Bulletin

Introduction

A software update is available to address various conditions on certain 2023 model year vehicles, including head unit rebooting, frozen displays, and incorrect navigation guidance. This bulletin provides the software update procedure and warranty information.

Software Update Procedure

The procedure consists of several steps, including disconnecting the battery, turning the ignition to IG-OFF, and reconnecting the battery. Additionally, the software update file must be downloaded to an empty USB flash drive and installed on the head unit.

Warranty Information

The repair is covered under the Toyota Basic Warranty, with differing mileage limitations for the USA and Mexico markets.

Manual:

Download: 2023 Toyota bZ4X, Corolla, Corolla Hatchback, Corolla HV, and Crown Audio Head Unit Software Update (Denso-Ten) Technical Service Bulletin

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