# Service bulletin T\-TT\-0721\-23 Rev

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: 10234332
- Published by NHTSA: 2023\-04\-17
- Manufacturer's number: T\-TT\-0721\-23 Rev
- Manufacturer's date: 2023\-03\-20
- NHTSA component: ELECTRICAL SYSTEM; EQUIPMENT

## NHTSA's summary

TT: Electronic Parts Catalog \(EPC\) does not include notes requiring ordering the Protector Heater seals when replacing the air conditioning Evaporator Core \(88511\- \#\#\#\#\#\) or Radiator Heater Unit SubAssembly \(87107\- \#\#\#\#\#

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10234332-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10234332-9999.pdf)

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

## Components

Electrical system, Equipment and accessories

## Vehicles listed

- 2016 to 2023 TOYOTA TACOMA

## Recalls for the same vehicles and component

- [22V310000](/recalls/nhtsa/22V310000.md), 2022-05-06: EQUIPMENT:OTHER:LABELS
- [2021723](/recalls/tc/2021723.md), 2021-11-24: Electrical
- [19V244000](/recalls/nhtsa/19V244000.md), 2019-03-27: EQUIPMENT:OTHER:LABELS
- [17V831000](/recalls/nhtsa/17V831000.md), 2017-12-20: EQUIPMENT:OTHER:LABELS
- [2017363](/recalls/tc/2017363.md), 2017-07-20: Electrical
- [17V425000](/recalls/nhtsa/17V425000.md), 2017-07-03: EQUIPMENT; STRUCTURE:BODY:HOOD:HINGE AND ATTACHMENTS

## Other bulletins for the same vehicles and component

- [T\-SB\-0106\-22 Rev2](/bulletins/11028726.md), 2026-02-11, Service bulletin: ELECTRICAL SYSTEM. OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T\-SB\-0001\-26.
- [T\-SB\-0001\-26](/bulletins/11028722.md), 2026-02-11, Service bulletin: ELECTRICAL SYSTEM. Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool \(SST\) USB flash drive to update the map, points of interest, and system software.
- [T\-TT\-0790\-25](/bulletins/11022964.md), 2025-09-09, Service bulletin: ELECTRICAL SYSTEM. Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free. This is caused by the phone Hands Free volume being too low.
- [T\-TT\-0780\-25](/bulletins/11019332.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\-0780\-25](/bulletins/11018329.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\-0106\-22 Rev2](/bulletins/11016786.md), 2025-04-08, Service bulletin: ELECTRICAL SYSTEM. Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool \(SST\) USB flash drive to update the map, points of interest, and system software. The SST is used with applicable vehicles to deliver the update, however, the process for generating license keys differs from previous generations.
- [T\-SB\-0106\-22 Rev2](/bulletins/11015500.md), 2025-03-11, Service bulletin: ELECTRICAL SYSTEM. Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool \(SST\) USB flash drive to update the map, points of interest, and system software. The SST is used with applicable vehicles to deliver the update, however, the process for generating license keys differs from previous generations.
- [T\-TT\-0756\-24](/bulletins/11003654.md), 2024-07-06, Service bulletin: ELECTRICAL SYSTEM. Phone call sound quality may be adjusted to fit the Tacoma owner’s preferences.
- [T\-TT\-0754\-24](/bulletins/11003619.md), 2024-07-06, Service bulletin: ELECTRICAL SYSTEM. Customers have expressed concerns about the performance of Qi Wireless Chargers. Wireless chargers on applicable vehicles are designed to work with Qi Certified devices only. MagSafe devices, that are not Qi Certified, may not charge as expected with Qi Wireless Chargers.
- [T\-TT\-0751\-24](/bulletins/11003607.md), 2024-07-06, Service bulletin: ELECTRICAL SYSTEM. Some customers have complained that the wireless functions of their Key Fob stop working. Key Fob LEDs will not turn ON, but engine starts with key held up against start button. Key battery voltage is confirmed OK and no DTC/RoB is found. This condition may occur if customer places Key Fob near wireless charger while phone is charging. When the key battery is removed and reinstalled, the Key Fob begins to operate normally.

JSON: [/v1/bulletins/10234332](/v1/bulletins/10234332)

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