# Service bulletin 26TC01

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.

- Type: Service bulletin
- NHTSA id: 11038371
- Published by NHTSA: 2026\-10\-08
- Manufacturer's number: 26TC01
- Manufacturer's date: 2026\-09\-08
- Campaign id or software version: 26TC01
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 26TC01 POWER DISTRIBUTION BOX CERTAIN 2025 MODEL YEAR bZ4x

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11038371-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11038371-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system

## Vehicles listed

- 2025 TOYOTA BZ4X

## Other bulletins for the same vehicles and component

- [26TC01](/bulletins/11038370.md), 2026-10-08, Service campaign: ELECTRICAL SYSTEM. An electrical connection for the rear window defogger may not have been installed correctly during vehicle assembly. Overtime, this can cause the rear window defogger to become inoperable, which could reduce visibility through the rear window when moisture or condensation is present
- [T\-SB\-0058\-23 Rev1](/bulletins/11020657.md), 2025-07-10, Service campaign: ELECTRICAL SYSTEM. The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks.
- [T\-TT\-0779\-25](/bulletins/11019331.md), 2025-06-06, Service bulletin: ELECTRICAL SYSTEM. To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.
- [T\-TT\-0779\-25](/bulletins/11018328.md), 2025-05-15, Service bulletin: ELECTRICAL SYSTEM. To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.
- [T\-SB\-0013\-24 Rev1](/bulletins/11016781.md), 2025-04-08, Service bulletin: ELECTRICAL SYSTEM. The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased and can never be reused. Another feature, Add/Remove Key, is also available. Once a key is removed, it can never be reused.
- [T\-SB\-0013\-24 Rev1](/bulletins/11015495.md), 2025-03-11, Service bulletin: ELECTRICAL SYSTEM. The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased and can never be reused. Another feature, Add/Remove Key, is also available. Once a key is removed, it can never be reused.
- [T\-SB\-0015\-25](/bulletins/11014209.md), 2025-02-12, Service bulletin: ELECTRICAL SYSTEM. Some 2021 – 2025 model year Toyota vehicles may require the download and installation of vehicle specific software or configuration software when the Electronic Control Unit \(ECU\) is replaced. GTS\+ software has been modified to indicate when configuration software is required. A new Configure column has been added to the GTS\+ Health Check Results screen to show when configuration software is available for a specific ECU.
- [T\-SB\-0011\-25](/bulletins/11014190.md), 2025-02-12, Service bulletin: ELECTRICAL SYSTEM. When certain vehicle ECUs are replaced, the ECU Security Key must be written in order for that ECU to communicate on the vehicle network. The GTS\+ Software Health Check Results screen has been enhanced to help identify if a replacement ECU requires an ECU Security Key.
- [T\-PANT\-2024\-001\-](/bulletins/10251744.md), 2024-03-18, Service bulletin: ELECTRICAL SYSTEM. PANT: Toyota is pleased to announce to all field and dealer personnel that we have launched a new part number to the Toyota Complete Maintenance Care \(TCMC\) Program, effective February 1, 2024. This new H4 Battery will be phased in over time as inventory levels for the current part number are depleted. Additionally, this new part number will have the same pricing as the current part number and will be drop shipped by an Interstate Battery Distributor.

JSON: [/v1/bulletins/11038371](/v1/bulletins/11038371)

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