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Service bulletin 05-79-20R

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 id10201813
Published by NHTSA2021-10-04
Manufacturer's number05-79-20R
Manufacturer's date2021-09-29
NHTSA componentWHEELS

NHTSA's summary

This bulletin announces a change made to the wheel lug nuts.

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

Wheels

Vehicles listed
SUBARU BRZ2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
SUBARU CROSSTREK2013 to 2015
SUBARU CROSSTREK2016, 2017, 2018, 2019, 2020
SUBARU FORESTER2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
SUBARU WRX2009 to 2014
SUBARU WRX2015, 2016, 2017, 2018, 2019, 2020
SUBARU WRX STI2009 to 2014
SUBARU WRX STI2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)

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
05-97-262026-05-04. Service bulletin. This Bulletin provides the diagnostic procedures to be followed when addressing customer concerns of steering wheel/vehicle body vibration when driving at highway speeds when tire/wheel balance is suspected.
05-94-252025-10-02. Service bulletin. This bulletin outlines the repair procedure to follow when the axle nut has rotated from its originally torqued position.
07-200-212021-10-04. Service bulletin. This bulletin announces the design changes to the right front wheel apron.
05-85-21R2021-05-05. Service bulletin. This bulletin announces a design change made to the TPMS valve assemblies.
05-76-20R2021-03-04. Service bulletin. This bulletin announces availability of new front wheel hub assemblies incorporating bearing surfaces having increased resistance to imperfections resulting from shock loads.
05-79-202021-01-05. Service bulletin. This Service Information Bulletin announces a change made to the wheel lug nuts.
05-70-19R2021-01-05. Service bulletin. This bulletin announces a design change made to the rear wheel / brake backing plates.
05-76-202020-09-04. Service bulletin. This bulletin announces availability of new front wheel hub assemblies incorporating bearing surfaces having increased resistance to imperfections resulting from shock loads.
14-24-202020-04-02. Service bulletin. This service information bulletin outlines a procedure for Subaru Special Tool Kit number J-53014.
05-70-192019-10-01. Service bulletin. This bulletin announces a design change made to the rear wheel / brake backing plates. Under certain circumstances, some customers may have a concern regarding a howling-type sound from the rear of the vehicle later diagnosed as a faulty hub / bearing assembly. Unevenness of the backing plate surfaces may affect the concentricity (roundness) of the hub / bearing after torqued during assembly and over time, cause the howling -type sound to develop. Production changes for the backing plates have been implemented to optimize their mounting surface quality.