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Service bulletin 23TC05A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10241409
Published by NHTSA2023-08-28
Manufacturer's number23TC05A
Manufacturer's date2023-07-27
NHTSA componentELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

RL: A software update has been developed for certain 2023 model year bZ4X vehicles. It is designed to improve DC-charging performance, and enhance visualization of the remaining range, current state of charge (SOC), and real-life energy consumption.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Software

Vehicles listed
TOYOTA BZ4X2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
23TC05_FAQ_10.042023-11-27. Service bulletin. FAQ: Certain 2023 Model Year bZ4X EV Charging Performance + Display Software Update Frequently Asked Questions
23TC01a2023-10-02. Service bulletin. RL: The subject vehicles are equipped with Toyota Safety Sense (TSS) which consists of several driving assist features, including pre-collision braking, lane departure warning, and more. Due to the programming of the software within the forward recognition camera, there is a possibility that under certain conditions, TSS functions could become inoperative for approximately 4 seconds before rebooting and becoming operational again.
23TC052023-08-28. Service bulletin. DP: A software update has been developed for certain 2023 model year bZ4X vehicles. It is designed to improve DC-charging performance, and enhance visualization of the remaining range, current state of charge (SOC), and real-life energy consumption.
22TD05-Update2023-01-03. Service bulletin. TI: TECHNICAL INSTRUCTIONS FOR LIMITED-SERVICE CAMPAIGN 22TD05 Software Update for ?Car Finder? Feature CERTAIN 2023 Model Year bZ4X