NHTSA ID Number: 11017444
Manufacturer Communication Number: 03-96-25
TSB/Document Date: 2025-05-01
Summary
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.
ATTENTION:
GENERAL MANAGER
q
PARTS MANAGER
q
CLAIMS PERSONNEL
q
IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.
SERVICE MANAGER
q
© 2025 Subaru
of America, Inc. All rights reserved.
SERVICE BULLETIN
APPLICABILITY: 2019-24MY Forester
2011-24MY WRX
2006-14MY Tribeca
2024MY Impreza & Crosstrek
2019-24MY Ascent
SUBJECT:
NUMBER: 03-96-25
DATE: 04/22/25
INTRODUCTION:
This bulletin announces design changes made to the rear axle hubs. The new hubs have been fitted
with the following:
1. Higher dust and water sealing performance of the inner seals.
2. Raised the shoulder height of the outer ring for added surface pressure relief.
3. Increased hardening surface of the ball bearings.
4. A new low-friction grease is used to enhance the sealing performance of the inner seals.
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. If diagnosis has
confirmed rear axle hub replacement due to sound/vibration complaint from a customer, replace the
affected axle hub using the parts described in this bulletin.
PRODUCTION CHANGE INFORMATION:
The NEW axle hubs have incorporated into vehicle production as per the VIN table below.
Model
Starting VIN
IMPREZA / CROSSTREK
RH348380
FORESTER
RH493976
WRX
R9800749
TRIBECA
N/A
Ascent
R3455408
CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD
RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.
Subaru Service Bulletins are intended for use by professional technicians ONLY. They
are written to inform those technicians of conditions that may occur in some vehicles,
or to provide information that could assist in the proper servicing of the vehicle. Properly
trained technicians have the equipment, tools, safety instructions, and know-how to
do the job correctly and safely. If a condition is described, DO NOT assume that this
Service Bulletin applies to your vehicle, or that your vehicle will have that condition.
Subaru of America, Inc. is
ISO 14001 Compliant
ISO 14001 is the international standard for
excellence in Environmental Management
Systems. Please recycle or dispose of
automotive products in a manner that is friendly
to our environment and in accordance with all
local, state and federal laws and regulations.
Continued...
Bulletin Number: 03-96-25; Date: 04/22/25
Page 1 of 3
DESCRIPTION OF DESIGN CHANGE:
PART INFORMATION:
REMINDER: Always order the most up-to-date replacement parts based on the specific VIN being
repaired.
Year
Model
2019-24MY
Forester
2022-24MY
WRX
2024
Impreza
2019-24MY
Ascent
2020-25MY
Legacy
2020-25MY
Outback
2024MY
Part Description
Part Number
28473VA012
Hub Unit Compl
28473XC00E
Crosstrek SIA Produced
(First 3 VIN Digits: 424)
Crosstrek Japan Produced
(First 3 VIN Digits: JF2)
28473VA012
Continued...
Bulletin Number: 03-96-25; Date: 04/22/25
Page 2 of 3
SERVICE PROCEDURE / INFORMATION:
REMINDER: Customer satisfaction and retention starts with performing quality repairs.
The service procedures for rear axle hub replacement remain unchanged. Always refer to the
applicable Service Manual and review the full requirements of the repair being performed. The
Service Manual procedures contain information critical to performing an effective repair the
first time, every time. This includes but is not limited to important SAFETY precautions, proper
inspection criteria, necessary special tools, required processes and related one-time-use parts needed
for a complete and lasting repair.
Refer to STIS: Driveline/Axle > PROPELLER SHAFT/DRIVE SHAFT/AXLE > Rear Hub Unit
Bearing
WARRANTY / CLAIM INFORMATION:
Refer to the applicable Labor Time Guide.
IMPORTANT REMINDERS:
•
SOA strongly discourages the printing and/or local storage of service information as previously
released information and electronic publications may be updated at any time.
•
Always check for any open recalls or campaigns anytime a vehicle is in for servicing.
•
Always refer to STIS for the latest service information before performing any repairs.
Bulletin Number: 03-96-25; Date: 04/22/25
Page 3 of 3
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TSB/Document ID: 03-96-25
Replacement Service Bulletin Number:
MFR Communication Date: 2025-04-22
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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