WenmarOpen by Wenmar Pro

Service bulletin 05-81-20

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 id10183697
Published by NHTSA2020-12-05
Manufacturer's number05-81-20
Manufacturer's date2020-11-10
NHTSA componentSUSPENSION

NHTSA's summary

This bulletin announces design changes made to certain rear shock absorbers used on the models listed.

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

Suspension

Vehicles listed
SUBARU WRX2018, 2019
SUBARU WRX STI2018, 2019 (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
05-84-21R2026-01-06. Service bulletin. This bulletin announces availability of new front wheel hub assemblies incorporating bearing surfaces having increased resistance to imperfections resulting from shock loads.
03-96-252025-05-01. Service bulletin. This bulletin announces design changes made to the rear axle hubs. These changes have been implemented to reduce cases water intrusion further leading to harmonic, humming, and grinding type sounds heard from the axle hub while driving.
03-94-242024-10-02. Service bulletin. This bulletin outlines the judgment criteria to be used when inspecting front transverse link bushings to reduce unnecessary bushing replacement.
05-91-242024-08-05. Service bulletin. This Bulletin provides guidance for diagnosing a leaking front or rear suspension strut.
5-88-21R2022-11-03. Service bulletin. This bulletin announces a design change made to the front stabilizer bushings.
05-88-212022-08-02. Service bulletin. This bulletin announces a design change made to the front stabilizer bushings.
05-88-212022-01-04. Service bulletin. This bulletin announces a design change made to the front stabilizer bushings.