ATTENTION:
GENERAL MANAGER

q

PARTS MANAGER

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CLAIMS PERSONNEL

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IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.

SERVICE MANAGER

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© 2025 Subaru of America, Inc. All rights reserved.

PRODUCT
CAMPAIGN
BULLETIN
SERVICE
BULLETIN
APPLICABILITY:
SUBJECT:

2023-2025 MY Solterra
Safety Recall and Stop Sale: Solterra HVAC
ECU Reprogramming

NUMBER:

WRD-25R

DATE:

09/12/25

REVISED:

03/03/26

NHTSA ID:

25V577

Subaru of America, Inc. (Subaru) has initiated a safety recall for certain 2023-2025 model year
Solterra Vehicles to update the HVAC control ECU software.
DESCRIPTION OF THE DEFECT AND SAFETY RISK
The subject vehicles are equipped with Heating, Ventilation, and Air Conditioning (HVAC) systems
that, among other things, control the windshield defroster function. Due to the programming of the
HVAC control ECU software, under certain conditions, such as a specific failure mode of the electric
compressor, the HVAC system will enter a failsafe mode that suspends the heater operation of the
system and affects defroster function.
In some cases, when the vehicle is operated in certain low temperatures, the defrosting performance
reduces and may not remove frost, ice and/or fog from the windshield glass. This can reduce driver
visibility and increase the risk of a crash in certain driving conditions.
REMEDY
Subaru retailers will update the HVAC control ECU software at no cost to the customer. For customer
satisfaction, dealers will inspect and, if necessary, replace the electrical compressor free of charge.
Due to current part inventory, stop sale vehicles requiring electrical compressor replacement will be
withheld from completion until part supply becomes sufficient and the service procedure provided in
this bulletin is revised.
AFFECTED VEHICLES
A total of 32,320 U.S. vehicles will be included in this safety recall as listed below. Not all vehicles
in the production range listed are affected by this recall. Coverage must be confirmed by using the
Vehicle Coverage Inquiry function on subarunet.com prior to repair.
Model Year

Carline

Production Date Range

2023-2025

Solterra

March 29, 2022 – June 3, 2025

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: WRD-25R; Revised: 03/03/26

Page 1 of 43

RETAILER RESPONSIBILITY
Please be advised that it is a violation of Federal law for a dealer to deliver a new motor vehicle
covered by a recall under a sale or lease until the defect is remedied. Therefore, any Authorized
Subaru Retailer failing to perform the applicable service procedures to correct all affected vehicles
in their inventory prior to the vehicle being placed in service may be subject to civil penalties of up
to $27,874 per violation (i.e., for each vehicle), as provided in 49 CFR §578.6 and will also be in
breach of the Subaru Dealer Agreement.
Any vehicles listed in any recall/campaign that are in retailer stock must be:
•

Immediately identified

•

Tagged or otherwise marked to prevent their delivery or use prior to repair

•

Repaired in accordance with the repair procedures outlined in the Product Campaign Bulletin

Retailers are to promptly perform the applicable service procedures, to correct all affected vehicles in
their inventory (used, demo & SSLP). Whenever a vehicle subject to this recall is taken into retailer
inventory necessary steps should be taken to ensure the recall correction has been made before selling
or releasing the vehicle.
OWNER NOTIFICATION
Subaru will notify affected vehicle owners by first class mail within 60 days. Retailers will be advised
when owner notification is scheduled.
PART INFORMATION:
A part kit for vehicles requiring electrical compressor replacement is currently in development.
Information regarding order placement will be provided once made available.
Note: If a compressor kit is needed, follow the parts release process outlined below the service
procedure.
Part Description

Part Number

Qty

WRD-25 COMPRESSOR KIT

0400530242

1

Image

COMPRESSOR ASSY, W/M

1

RECEIVER ASSY

1

O-RING

2

O-RING Dimensions
ID : 13.4mm / OD : 18.2mm

O-RING

2

O-RING Dimensions
ID : 17.2mm / OD : 22.0mm

O-RING

3

O-RING Dimensions
ID : 10.8mm / OD : 15.6mm

O-RING

2

O-RING Dimensions
ID : 6.7mm / OD : 10.3mm

Continued...
Bulletin Number: WRD-25R; Revised: 03/03/26

Page 2 of 43

.CUW FILE INFORMATION:
The following files can be located in the ECU Data folder within the TechStream files located on the
Subaru Desktop.

MY

File Description

Target CID

New CID

23

NA(23MY)_8865F4216000.cuw

8865F4213100

8865F4216000

24-25

NA(24-25MY)_8865F4228100.cuw

8865F42220A0
or
8865F4228000

8865F4228100

REQUIRED TOOLS FOR REPROGRAMMING:
Tool Description

Applications

Image

Laptop
DST-i or DST-010
For DTC inspection
and
Reprogramming
GTS+

< MIDTRONICS >
DCA-8000

Required to maintain battery
voltage during the reprogramming procedure

Continued...
Bulletin Number: WRD-25R; Revised: 03/03/26

Page 3 of 43

REQUIRED TOOLS FOR A/C COMPRESSOR REPLACEMENT (IF REQUIRED):
Tool Description

Applications

Refrigerant Recovery and Filling Device
(compatible with 1234yf)

For air conditioner gas recovery
and refilling

Air conditioner gas leak tester

Inspect for refrigerant leak

Insulated Tool Set
and
Insulated Gloves

For working with high-voltage components

Circuit Tester

For checking voltage

Insulating tape

For connector protection

Protective Tape

For protecting parts

Torque Socket Wrench E8

For removing / installing compressor

Cable Tie

Image

For holding parts
(20-30cm)

Cloths

For cleaning

Protective Equipment

For protecting hands and eyes

General Tools

For work purposes

Torque Wrench

Check tightening torque

Continued...
Bulletin Number: WRD-25R; Revised: 03/03/26

Page 4 of 43

SERVICE PROCEDURE FLOW CHART:

NOTE: PRIOR to attempting any reprogramming, complete all required inspection and where
necessary related repairs outlined in the above flow chart. 2023MY vehicles MUST require the
software outlined in EEA-23 to be installed prior to reprogramming. ALWAYS confirm the target
CID prior to reprogramming.

Continued...
Bulletin Number: WRD-25R; Revised: 03/03/26

Page 5 of 43

COMPONENT LOCATION:

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Bulletin Number: WRD-25R; Revised: 03/03/26

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Bulletin Number: WRD-25R; Revised: 03/03/26

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SERVICE PROCEDURE:
STEP 1: Has the vehicle been produced on or prior to January 14, 2025? This can be confirmed by
the vehicle inquiry.
YES: Proceed to Step 2.
NO: Proceed to Reprogramming File Procedure.
STEP 2: Is the AC compressor making abnormal noise.
YES: Refer to the service procedure in the APPENDIX A section.
NO: Proceed to Step 3.
STEP 3: Perform a Health Check using GTS+. Check for any faults detected by the Air Conditioner
system. Refer to the table below to confirm the next course of action.

JUDGMENT CRITERIA
Are any or both of the following DTCs current or stored?
DTC : B14721C ( A/C Inverter High Voltage Output Circuit Voltage Out of Range)
DTC : B14744B ( A/C Inverter Cooling/Heating Over Temperature)

NO
NO
YES

Inspection Result
No DTC detected

Next Step
Proceed to the next step.

Correct the fault using the procedure supplied in the
applicable SM and then proceed to the Reprograming
DTCs other than B14721C &
File Procedure. IMPORTANT: If the diag procedures
B14744B
lead to compressor replacement, refer to the procedure in the APPENDIX A section.
Order parts according to the parts ordering process,
B14721C and/or B14744B
and perform both the Compressor Motor and Redetected
ceiver Tank Replacement Procedure and the Reprogramming File Procedure.

STEP 4: Re-check for any other A/C compressor-related DTCs and inspect the A/C compressor for
abnormal noises. If any further assistance is require, please prepair the following information and
contact Techline.
• Record a video of the noise
•

Save a complete GTS+ Health Check

•

Save the Trouble Tree results for the related DTCs

Continued...
Bulletin Number: WRD-25R; Revised: 03/03/26

Page 10 of 43

STEP 5: Confirm the ignition switch is
“READY ON”. Check the status of the ambient temperature displayed on the instrument cluster. This
temperature will confirm the A/C settings for the required inspection mode performed in the next
step.

IMPORTANT: Inspection cannot be performed on vehicles stored in an outside temperature of
14°F (-10°C). The inspection mode of the compressor is strongly impacted by temperature. For cases
when the vehicle was stored below 14°F (-10°C), the vehicle MUST be warmed using the following
procedures:
1. Move the vehicle to a location with an ambient temperature higher than 14°F (-10°C).
2. Turn the ignition OFF and wait at least 3 minutes.
3. Disconnect the negative battery terminal.
4. Wait at least 2 minutes.
5. Reconnect the negative battery terminal.
6. Confirm the displayed ambient temperature on the instrument cluster reads above 14°F
(-10°C). Repeat this process until the desired temperature is reached prior to proceeding.

Continued...
Bulletin Number: WRD-25R; Revised: 03/03/26