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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© 2021 Subaru of America, Inc. All rights reserved.

PRODUCT CAMPAIGN BULLETIN
APPLICABILITY:

2017-2019 MY Impreza
2018-2019 MY Crosstrek

NUMBER: WRE-21R

SUBJECT:

Ignition Coil Replacement

NHTSA ID: 21V-264

DATE: 04/23/21
REVISED: 04/30/21

INTRODUCTION:
Subaru of America, Inc. (Subaru) is recalling certain 2017-2019 model year Impreza and 2018-2019
model year Crosstrek vehicles to check and, if necessary, update the ECM programming, and to
replace all four ignition coils in each vehicle.
This recall supersedes Subaru’s previous WUQ-02 ignition coil reprogramming recall issued in
October 2019. Effective April 23, 2021, any open WUQ-02 recall coverage has been expired,
and WUQ-02 recall repairs should no longer be performed after that date.
All vehicles previously affected by the WUQ-02 recall are now affected by this new recall and
must return to complete the WRE-21 recall repair.

DESCRIPTION OF THE DEFECT AND SAFETY RISK:
Subaru has determined that the ECM reprogramming was effective for vehicles that were repaired
under previous recall WUQ-02. However, as a result of further analysis, Subaru has determined that
all four ignition coils should be replaced to prevent the condition described below.
Under certain circumstances, the ignition coil may be energized longer than designed after the engine
is OFF. If the ignition coil remains energized for too long, the internal temperature of ignition coil
may increase which could cause a short circuit and a blown fuse. If a short circuit occurs while the
vehicle is in motion, the vehicle may experience a loss of motive power while driving without the
ability to immediately restart the engine.
If a short circuit in the ignition coil occurs while the vehicle is in motion, the vehicle may experience
a loss of motive power while driving without the ability to immediately restart the engine, increasing
the risk of a crash.
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: WRE-21R; Revised: 04/30/21

Page 1 of 8

AFFECTED VEHICLES:
The number of U.S. vehicles affected by this recall is 466,205.
Model Year

Carline

Production Date Range

2017-2019

Impreza 4D

7/1/2016 - 6/17/2019

2017-2019

Impreza 5D

7/1/2016 - 6/17/2019

2018-2019

Crosstrek

5/09/17 – 5/08/2019

Not all vehicles in the production date ranges listed above are affected by this recall. Coverage must
be confirmed by using the Vehicle Coverage Inquiry function on subarunet.com prior to repair. This
recall coverage information is now available.
Over the next several weeks, prior to owner notification, Subaru will be receiving air shipments of
the parts needed to support the launch of this recall. Therefore, the status of the WRE-21 recall will
display as “Open – Limited Parts Available” until the owner notification letters are released in June.
This status is for informational purposes and will not prevent the ability for retailers to perform and
claim reimbursement for this repair prior to owner notification. Once the owner notification letters
are released, the status will be updated to “Open.”
DESCRIPTION OF THE REMEDY:
For all vehicles included in this recall, Subaru retailers will check and, if necessary, update the ECM
programming, and replace all four ignition coils at no cost to the customer. If a certain DTC is found
to be stored, Subaru will replace the front exhaust pipe at no cost as well.
RETAILER RESPONSIBILITY:
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). Additionally, 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.
Please be sure to download a copy of your complete inventory report from the Vehicle Inventory
Dashboard available on subarunet.com to identify any vehicles with open recalls that may be in your
retail, CPO, and SSLP inventory. Affected vehicles will show an Open Recall column indicator (Y).
OWNER NOTIFICATION:
Subaru will notify affected vehicle owners by first class mail in June. Retailers will be advised when
the notification is scheduled.
Continued...
Bulletin Number: WRE-21R; Revised: 04/30/21

Page 2 of 8

PART INFORMATION:
IMPORTANT NOTES:
•
•

A quantity of FOUR (4) ignition coils must be ordered to repair ONE (1) vehicle.
All orders for these ignition coils must be placed through PRIME only.
Description

Part Number

Qty. Required

COIL ASSEMBLY- IGNITION

22433AA7419S

4 Per Vehicle

SERVICE PROCEDURE / INFORMATION:
REMINDER: Customer satisfaction and retention starts with performing quality repairs.
The following Flow Chart is provided as an overview of the procedures required to perform this
Recall. A detailed Service Procedure is also supplied below.

Continued...
Bulletin Number: WRE-21R; Revised: 04/30/21

Page 3 of 8

STEP 1) Does the engine start normally?
No

The engine does NOT start normally: Proceed to STEP 2 (inspection of fuses in M/B).

Yes

The engine starts normally: Proceed to STEP 3.

STEP 2) Inspect the M/B fuse #21 (15A) for IMPREZA and CROSSTREK. Is the fuse blown?
No

The fuse is NOT blown: Diagnose the hard starting condition per the applicable
Service Manual then proceed to STEP 3.

Yes

The fuse IS blown: Proceed to STEP 3. After checking DTCs, replace the fuse.

STEP 3) Using the SSM scan for DTCs. Are any of the following DTCs current or stored in the
ECM memory?
[P0301: CYLINDER 1 MISFIRE]
[P0302: CYLINDER 2 MISFIRE]
[P0303: CYLINDER 3 MISFIRE]
[P0304: CYLINDER 4 MISFIRE]
[P0420: CATALYST SYSTEM EFFICIENCY BELOW
THRESHOLD BANK 1]
No

Yes

NONE of the DTCs are current or stored: Replace all four (4) ignition coils following
the procedure in the applicable Service Manual.
ANY of DTCs are current or stored: Replace all four (4) of the ignition coils AND the
Exhaust Pipe Front assembly following the procedure in the applicable Service Manual
to perform the work

TIP: When disconnecting the harness connectors from the ignition coils, squeeze the wire retaining
clip (a) and push the connector off using a trim clip tool as shown in the illustration below. DO NOT
remove the wire retaining clip from the harness connector.

Continued...
Bulletin Number: WRE-21R; Revised: 04/30/21

Page 4 of 8

STEP 4) Using the SSM, check the CID to determine if the ECM requires reprogramming. Compare
the current CID to the “GOOD” CID numbers supplied in the table below.
CRITICAL STEP: Is the current CID listed as “GOOD” on the table below?
No

Yes

Current CID IS NOT listed as “GOOD” on the table below. REPROGRAM THE
ECM to the latest available version using the normal FlashWrite procedure.
Current CID IS listed as “GOOD” on the table below. DO NOT REPROGRAM THE
ECM. The procedure is complete. Proceed to CLAIM REIMBURSEMENT AND
ENTRY PROCEDURES section.
MY / Model

Transmission Type

Active Grille Shutter Y/N

2017 Impreza

CVT

Y

XH3J2B0D

XH3J2C0D

5MT

Y

XH3J2B0C

XH3J2C0C

5MT

N

XH3J2B0A

XH3J2C0A

CVT

N

XH3J2B0B

XH3J2C0B

CVT

Y

XH3J900D

XH3JA00D

5MT

Y

XH3N500C

XH3N600C

CVT

Y

XH3N500D

XH3N600D

5MT

N

XH3N500A

XH3N600A

CVT

N

XH3N500B

XH3N600B

6MT

N

XH3J2B0E

XH3J2C0E

CVT

N

XH3J2B0F

XH3J2C0F

6MT

Y