NHTSA ID Number: 10187322
Manufacturer Communication Number: WQW-58R
TSB/Document Date: 2021-02-18
Summary
Subaru
of America, Inc. has determined that vehicles affected by this Service Program require ECM reprogramming.
LABOR
TIME
Spark Plugs- OK
Leak-Down Test- OK
ECM is up-to-date*
INCLUDES:
CID CHECK, SPARK PLUG
REMOVAL FOR INSPECTION,
MARKING, REINSTALLATION,
CYLINDER LEAK-DOWN
TEST, ECM CHECK FOR
REPROGRAMMING
B114-550*
3.3
Spark Plugs- OK
Leak-Down Test- N/G
ECM is up-to-date*
INCLUDES:
CID CHECK, SPARK PLUG
REMOVAL FOR INSPECTION,
MARKING, REINSTALLATION,
CYLINDER LEAK DOWN
TEST, ECM CHECK FOR
REPROGRAMMING
B114-666*
3.3
OUTCOME
LABOR
DESCRIPTION
LABOR
OPERATION #
LABOR
TIME
Top Engine Clean
HIGH FIRST LEAK-DOWN TEST
RESULT, PERFORM TOP ENGINE
CLEAN, ROAD TEST & PERFORM
2ND LEAK-DOWN TEST
C114-663
2.2
ECM REPROGRAMMING
C114-558
If ECM is not
up-to-date
CLAIM
TYPE
CAMPAIGN
CODE
RC
WQW-58
CLAIM
TYPE
CAMPAIGN
CODE
RC
WQW-58
0.3
Top Engine Cleaner Corrected Cylinder Leakage Condition.
*If ECM reprogramming is required, use in conjunction with C114-558
Continued...
Bulletin Number: WQW-58R; Revised: August 14, 2017
Page 12
COMPLETE ENGINE ASSEMBLY REPLACEMENT
OUTCOME
LABOR
DESCRIPTION
LABOR
OPERATION #
LABOR
TIME
Spark Plugs- and/or
Leak-Down Test- N/G
ECM up-to-date*
INCLUDES:
CID CHECK, SPARK PLUG
REMOVAL FOR INSPECTION,
MARKING, REINSTALLATION,
LEAK-DOWN TEST, ENGINE REPLACEMENT AND ECM CHECK
FOR REPROGRAMMING
B114-662*
7.6
Top Engine Clean
(if required)**
HIGH FIRST LEAK-DOWN TEST
RESULT, PERFORM TOP ENGINE
CLEAN, ROAD TEST & PERFORM 2ND LEAK-DOWN TEST
C114-663
2.2
When Applicable
ENGINE HARNESS CHANGEOVER TO REPLACEMENT
ENGINE ASSEMBLY WHEN
REQUIRED ON APPLICABLE
FORESTER MODELS
C114-556
1.9
If ECM is not
up-to-date
ECM REPROGRAMMING
C114-558
0.3
CLAIM
TYPE
CAMPAIGN
CODE
RC
WQW-58
** NOTE: Top Engine Cleaning is Not Required if Spark Plug damage is confirmed.
Failed Leak-Down Test, Top Engine Clean Did Not Correct Cylinder Leakage Condition.
*If ECM reprogramming is required, use in conjunction with C114-558
SHORT BLOCK REPLACEMENT FOR WHEN COMPLETE ENGINE ASSEMBLY IS NOT AVAILABLE
OUTCOME
LABOR
DESCRIPTION
LABOR
OPERATION #
LABOR
TIME
Spark Plugs- and/or
Leak-Down Test- N/G
ECM up-to-date*
INCLUDES:
CID CHECK, SPARK PLUG
REMOVAL FOR INSPECTION,
MARKING & REINSTALLATION,
LEAK DOWN TEST AND ECM
CHECK FOR REPROGRAMMING
B114-664*
3.3
Top Engine Clean
(if required)**
HIGH FIRST LEAK-DOWN TEST
RESULT, PERFORM TOP ENGINE
CLEAN, ROAD TEST & PERFORM 2ND LEAK-DOWN TEST
C114-663
2.2
Spark Plugs- and/or
Leak-Down Test- N/G
Only one bank affected
SHORT BLOCK AND ONE
COMPLETE CYLINDER HEAD
ASSEMBLY REPLACED
C114-551
11.8
Spark Plugs- and/or
Leak-Down Test- N/G
Both banks affected
SHORT BLOCK AND BOTH
COMPLETE CYLINDER HEAD
ASSEMBLIES REPLACED
C114-554
12.2
OUTCOME
LABOR
DESCRIPTION
LABOR
OPERATION #
LABOR
TIME
C114-571
13.4
C114-574
14.6
C114-558
0.3
Includes time for
SHORT BLOCK AND ONE BARE
changeover of all cylinCYLINDER HEAD REPLACED
der head components
including valve replace- SHORT BLOCK AND BOTH BARE
CYLINDER HEADS REPLACED
ment when required
If ECM is not
up-to-date
ECM REPROGRAMMING
CLAIM
TYPE
CAMPAIGN
CODE
RC
WQW-58
CLAIM
TYPE
CAMPAIGN
CODE
RC
WQW-58
** NOTE: Top Engine Cleaning is Not Required if Spark Plug damage is confirmed.
Failed Leak-Down Testing, Top Engine Cleaner Did Not Correct Cylinder Leakage Condition.
* If ECM reprogramming is required, use in conjunction with C114-558
Continued...
Bulletin Number: WQW-58R; Revised: August 14, 2017
Page 13
POST-REPAIR CONCERN
OUTCOME
LABOR
DESCRIPTION
LABOR
OPERATION #
LABOR
TIME
CLAIM
TYPE
CAMPAIGN
CODE
Spark Plugs- OK
Leak-Down Test- OK
ECM Reprogramming
BUT engine operation
issue(s) persist
INCLUDES:
CID CHECK, SPARK
PLUG REMOVAL FOR
INSPECTION,MARKING,
REINSTALLATION, LEAK-DOWN
TEST, ECM REPROGRAMMING
AND DATA FILE COLLECTION
FOR SUBMISSION TO TECHLINE
B114-553
3.9
WC
BAY-58
Condition Occurred After Engine Repairs/Replacement Completed.
MUST Review With Techline And/Or FSE Before Proceeding!
ADDITIONAL REQUIRED CLAIM CODING FOR USE WITH “APPENDIX A”:
Labor Description
Labor Operation #
Labor Time
RETROFIT 2017MY COMPLETE ENGINE
ASSY. FOR USE IN PRIOR MY VEHICLE
C114-557
5.7
RETROFIT 2017MY SHORT BLOCK ASSY.
FOR USE IN PRIOR MY VEHICLE
C114-559
1.5
Fail Code
WQW-58
NOTE:
Must be used
with B114-662
Must be used
with B114-664
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.
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”
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: WQW-58R; Revised: August 14, 2017
Page 14
OWNER NOTIFICATION LETTER
Subaru Service Program WQW-58
February 2016
Dear Subaru Owner:
We would like to thank you for your selection of a Subaru vehicle. We take pride in our products and are
committed to your continued satisfaction.
Subaru has developed a modification to the Engine Control Module (ECM) software logic due to a possible
pre-ignition issue on certain 2015 model year WRX vehicles and certain 2014 and 2015 model year 2.0XT
Forester vehicles, equipped with a 2.0 liter turbocharged engine.
You received this notice because our records indicate that you currently own one of these vehicles.
DESCRIPTION
Under certain high engine load driving conditions, engine combustion may occur prior to spark ignition
resulting in elevated cylinder temperatures and pressures. This could cause a rough idle and engine noise, and
if left unaddressed it could lead to excessive erosion of the spark plugs and possible engine damage.
REPAIR
The repair will be performed at no cost to you. Subaru will inspect your vehicle and reprogram the ECM. If any
related spark plug or engine damage is detected during the inspection, your vehicle will be repaired.
WHAT YOU SHOULD DO
You should immediately contact your Subaru retailer (dealer) for an appointment to have this repair performed.
HOW LONG WILL THE REPAIR TAKE?
The time to perform the inspection and reprogramming is approximately three hours. However, it may be
necessary to leave your vehicle for a longer period of time on the day of your scheduled appointment to allow
your Subaru retailer flexibility in scheduling, or for repair.
CALIFORNIA REGISTERED OWNERS
The California Air Resources Board requires that emission related campaigns be completed prior to California’s
vehicle registration renewal process; without this repair, you will not be able to register your vehicle during your
next annual registration. Upon completion of this campaign, your California dealer will complete and provide
you a “Proof of Correction Certificate.” If required, present the certificate to the California Department of Motor
Vehicles (the “DMV”) when renewing your California registration as proof of campaign completion. If the DMV
does not request the certificate, we recommend that you keep it for your records.
In addition, the State of California requires that every vehicle must pass an emission test (SMOG Check) every two
years and before it is sold. Without the service we are providing at no charge, your vehicle may not pass this test.
Continued...
Bulletin Number: WQW-58R; Revised: August 14, 2017
Page 15
CHANGED YOUR ADDRESS OR SOLD YOUR SUBARU?
If you have moved or sold your vehicle, please complete the enclosed prepaid postcard and mail it to us. Or if
you prefer to update this information online, please go to www.subaru.com, select ‘Customer Support,’ then select
‘Address Update’ or ‘Ownership Update’ from the drop down menu.
IF YOU NEED FURTHER ASSISTANCE:
To locate the nearest Subaru retailer you can access our website at www.subaru.com and select ‘Find a Retailer.’
For additional information, please go to: http://www.wqw58.service-campaign.com.
If you need additional assistance, please contact us directly:
•
By e-mail: Go to www.subaru.com, Customer Support and select “Contact Us”
•
y telephone: 1-800-SUBARU3 (1-800-782-2783)
B
Monday through Thursday between 7:30 a.m. and 8:00 p.m. ET
Friday between 10:30 a.m. and 5:00 p.m. ET
Saturday between 9:00 a.m. and 3:30 p.m. ET
•
y U.S. Postal mail: Write us at Subaru of America, Inc., Attn: Customer-Retailer Services Department,
B
P.O. Box 6000, Cherry Hill, NJ 08034-6000
Please contact us immediately if the Subaru retailer fails or is unable to make the necessary repairs free of charge.
Your continued satisfaction with your Subaru is important to us. Please understand that we have taken this action
in the interest of your vehicle’s proper operation. We sincerely apologize for any inconvenience this matter may
cause and urge you to schedule an appointment as soon as possible to have this repair performed.
Sincerely,
Subaru of America, Inc.
Notice to Lessors: Under Federal law the lessor of a vehicle who receives this letter must provide a copy of it to the vehicle lessee(s)
within 10 business days from receipt. The lessor must also keep a record of the lessee(s) to whom this letter is sent, the date sent, and the
applicable vehicle identification number (VIN). (For the purposes of this section, a lessor means a person or entity that in the last twelve
months prior to the date of this notification has been the owner, as referenced on the vehicle’s title, of any five or more leased vehicles. A
leased vehicle is a vehicle leased to another person for a term of at least four months.)
A subsidiary of Fuji Heavy Industries Ltd.
Bulletin Number: WQW-58R; Revised: October 7, 2016
Page 16
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: WQW-58R
Replacement Service Bulletin Number:
MFR Communication Date: 2021-02-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission
, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU coding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations
- 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Programming): Allows for Ford, for Lincoln, and for Mazda ECU programming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- Cost-effective ECU Coding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 3 Years Software Update, Value for Money: With 3 years of software updates and 22+ languages(no IP restrictions), XTOOL D7S auto scanner code scanner ensures ongoing compatibility for the latest car models and improved diagnostic functions. This all system vehicle diagnostic scanner comes with a 30-day return policy and a 24-month repair for dependable performance. XTOOL are dedicated to your satisfaction, so enjoy seamless support and lifetime expert assistance. Should you encounter any issues or concerns, don’t hesitate to reach out XTOOL. D7S with newest update with 22 languages freely transfer without authorization, check details from setting-language or from XTOOL
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.