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Service bulletin 5-88-21R

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 id10225740
Published by NHTSA2022-11-03
Manufacturer's number5-88-21R
Manufacturer's date2022-10-03
NHTSA componentSUSPENSION

NHTSA's summary

This bulletin announces a design change made to the front stabilizer bushings.

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 ASCENT2019, 2020, 2021, 2022
SUBARU CROSSTREK2013 to 2015
SUBARU CROSSTREK2016, 2017, 2018, 2019, 2020, 2021
SUBARU FORESTER2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
SUBARU IMPREZA2017, 2018, 2019, 2020, 2021, 2022
SUBARU LEGACY2015, 2016, 2017, 2018, 2019
SUBARU OUTBACK2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
SUBARU WRX2015, 2016, 2017, 2018, 2019, 2020, 2021

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

Recalls for the same vehicles and component
21V6750002021-08-30. SUSPENSION:FRONT:CONTROL ARM:LOWER ARM
20212262021-04-15. Suspension
21V2630002021-04-15. SUSPENSION:REAR
16V5760002016-08-03. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER; SUSPENSION

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
05-97-252026-01-06. Service bulletin. This Bulletin announces a design change to the rear stabilizer bar bushing to address knocking sounds as a result of excessive clearance between the stabilizer bar and the bushing. The updated bushing features enhanced rubber material that is more elastic in cold climates.
05-95-252026-01-06. Service bulletin. This bulletin announces availability of new front wheel hub assemblies incorporating bearing surfaces having increased resistance to imperfections resulting from shock loads.
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.
WQQ-52R2025-04-01. Service bulletin. Due to incomplete repair instructions previously provided in the WQK-47 recall bulletin, the WQQ-52 recall will involve applying additional anti-corrosion material to the four-way (2-2 way) joint connector area of the brake line system on Forester, Impreza, WRX, and STI vehicles previously repaired under the WQK-47 (14V-311) brake line corrosion recall prior to the December 23, 2014 WQK-47 recall bulletin revision. The revisions to the bulletin are for part number changes.
03-95-242025-01-03. Service bulletin. This bulletin announces the repair procedures to be followed when encountering cases of a groaningtype sound from the rear of the vehicle heard when turning.
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.
WRL-21R2024-04-03. Service bulletin. Subaru of America, Inc. (Subaru) has initiated this safety recall for certain 2020 model year Ascent vehicles in which the front axle housings may have been manufactured with improperly tapered tie rod mounting holes.
05-90-24R2024-04-02. Service bulletin. This bulletin announces changes in design to the front strut assemblies which will address cases of rumbling and/or rattling coming from the undercarriage while going over bumps.