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Service bulletin 09-79-21

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 id10201791
Published by NHTSA2021-10-04
Manufacturer's number09-79-21
Manufacturer's date2021-09-08
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ELECTRICAL SYSTEM

NHTSA's summary

This bulletin announces availability of ECM reprogramming files to address isolated concerns of inaccurate values being displayed when accessing Lifetime Tracking Data using the Subaru Select Monitor and / or a Generic Scan Tool (GST).

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, Engine, Engine control module

Vehicles listed
SUBARU WRX2021

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