Service bulletin HOY Region Email

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)
Type	Service bulletin
NHTSA id	10146502
Published by NHTSA	2018-11-05
Manufacturer's number	HOY Region Email
Manufacturer's date	2017-12-20
NHTSA component	ELECTRICAL SYSTEM

NHTSA's summary

Region Email: The subject vehicles are voluntarily equipped with an event data recorder (EDR). The EDR only collects, stores, and allows retrieval of vehicle event data, including crash events. It does not control the operation of the vehicle or crash safety systems. Due to a software error in the air bag ECU where EDR data is stored, the EDR data for ?Frontal Airbag Deployment, Time to 1st Stage Deployment,? and ?Frontal Airbag Deployment Time to 2nd Stage Deployment,? will show the same value at the time an event is recorded. This software error has no effect on the actual air bag?s deployment times for both stages. Both air bags operate as designed.

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

Vehicles listed
TOYOTA SEQUOIA	2018
TOYOTA TUNDRA	2018

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

Recalls for the same vehicles and component
2021723	2021-11-24. Electrical
21V688000	2021-09-02. EXTERIOR LIGHTING:HEADLIGHTS; ELECTRICAL SYSTEM:WIRING
20V410000	2020-07-15. EXTERIOR LIGHTING:TURN SIGNAL; ELECTRICAL SYSTEM:WIRING
18V685000	2018-10-04. ELECTRICAL SYSTEM:SOFTWARE; AIR BAGS
2018100	2018-02-21. Electrical

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
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T-SB-0057-18	2023-06-26. Service bulletin. TSB: 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. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system.
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