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Service bulletin T-SB-0025-25

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 id11015876
Published by NHTSA2025-03-24
Manufacturer's numberT-SB-0025-25
Manufacturer's date2025-02-12
Campaign id or software versionT-SB-0025-25
NHTSA componentENGINE

NHTSA's summary

Some 2024 model year bZ4X vehicles may exhibit a condition where the charging limit setting defaults to full after every key cycle, removing the upper limit set by the customer. The electric converter unit assembly software logic has been modified to address this condition.

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

Engine

Vehicles listed
TOYOTA BZ4X2024

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
T-TT-0801-262026-05-08. Service bulletin. Some Customers for the above vehicles may have complaint of the following: unable to charge the vehicle using the supplied level 1 or 2 charger. Additionally, most will indicate one or more of the LEDs on the charger will illuminate at the time of no charge. Charging at other stations is still possible.
T-TT-0801-262026-04-08. Service bulletin. Some Customers for the listed vehicles may have complaint of the following: unable to charge the vehicle using the supplied level 1 or 2 charger. Additionally, most will indicate one or more of the LEDs on the charger will illuminate at the time of no charge. Charging at other stations is still possible.
T-TT-0784-25 Rev12025-07-10. Service bulletin. Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these type of DTCs.
T-TT-0784-252025-07-10. Service bulletin. Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these type of DTCs.
T-SB-0021-252025-04-08. Service bulletin. Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Global Techstream+ (GTS+) ECU flash reprogramming procedures and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard+ (CUW+). To ensure the correct ECU software is installed, ECUs will require a Security Signature before the ECU will initialize the flash reprogramming sequence. This bulletin also details the process for acquiring a Security Signature from TIS during the GTS+ ECU flash reprogramming process.
T-SB-0107-20 Rev22025-03-25. Service bulletin. OBSOLETE NOTICE February 11, 2025: This bulletin is now obsolete. Please see T-SB-0021-25.
T-SB-0021-252025-03-11. Service bulletin. Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Global Techstream+ (GTS+) ECU flash reprogramming procedures and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard+ (CUW+). To ensure the correct ECU software is installed, ECUs will require a Security Signature before the ECU will initialize the flash reprogramming sequence. This bulletin also details the process for acquiring a Security Signature from TIS during the GTS+ ECU flash reprogramming process.
T-TT-0770-242025-01-09. Service bulletin. Customers or Technicians may want to view the user manual or the troubleshooting guide for the Toyota EV Charger (Part Number PTQ64-00240). Basic operation and diagnostic troubleshooting information is not found in the vehicle’s Owner’s Manual or the Repair Manual.
T-TT-0709-22 Rev22024-07-23. Service bulletin. •Some customers may be concerned that EV (Electric Vehicle) Battery charging performance does not meet their expectation. •To extend the life of the EV Battery, some limitations may occur during EV battery charging •This communication is a reference to the factors that can lead to charging limitations, as explained in the Owner’s Manual (Electric Vehicle System - Section 2.2)
T-TT-0757-242024-07-23. Service bulletin. Some customers may notice momentary power dips on graphs produced by the Charge Point Charger’s phone App during A/C charging.