NHTSA ID Number: 10189764
Manufacturer Communication Number: 21B13
Summary
Certain 2017-2019 Model Year Explorer Vehicles Rear Wheel Knuckle and Toe Link Replacement
This program is a proactive investigation by Ford
Motor Company to obtain field parts for testing. Ford
is voluntarily conducting this program to replace both rear toe links and wheel knuckles on vehicles always registered and always residing in the Detroit (and Toronto) area. The replacement toe links and knuckles being installed contain no enhancements and are identical to the parts being removed. It is very important that parts obtained from this program be returned to Ford
for this study
3 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
| FORD | EXPLORER | 2017-2019 |
PROGRAM TERMS
This program will be in effect through May 31, 2021. There is no mileage limit for this program.
AFFECTED VEHICLES
| Vehicle | Model Year | Assembly Plant | Build Dates |
| Explorer | 2017-2019 | Chicago | January 27, 2017 through September 16, 2018 |
REASON FOR THIS PROGRAM
This program is a proactive investigation by Ford
Motor Company to obtain field parts for testing. Ford
is voluntarily conducting this program to replace both rear toe links and wheel knuckles on vehicles always registered and always residing in the Detroit (and Toronto) area. The replacement toe links and knuckles being installed contain no enhancements and are identical to the parts being removed. It is very important that parts obtained from this program be returned to Ford
for this study.
SERVICE ACTION
Dealers are to replace both rear toe links and wheel knuckles and return the parts for analysis. This service must be performed on all affected vehicles at no charge to the vehicle owner.
OWNER NOTIFICATION AND MAILING SCHEDULE
Owner letters are expected to be mailed the week of March 15, 2021. Dealers should repair any affected vehicles that arrive at their dealerships, whether or not the customer has received a letter.
TITLE BRANDED / SALVAGED VEHICLES
Affected title branded and salvaged vehicles are eligible for this service action.
OWNER REFUNDS
Refunds are not approved for this program.
RENTAL VEHICLES
Rental vehicles are not approved for this program.
PARTS REQUIREMENTS / ORDERING INFORMATION
| Part Number | Description | Order Quantity | Claim Quantity |
| W712435-S439
Genuine *Nut W712435-S439
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | Wheel Hub Nut – AWD Only | 1 | 2 |
| PM-4-A
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API | Brake Parts Cleaner | As Required | |
| W710681-S439 | Brake Caliper Bolts | 2 | 4 |
| W708733-S439 | Brake Disk Retainer Bolt (4 in package 2 required) | 1 | 2 |
| W520213-S440
Genuine Suspension Stabilizer Bar Link Nut W520213-S440
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API | Rear Stabilizer Link Nut | 1 | 2 |
| W714033-S439 | Shock Absorber Bolt (4 in package 2 required) | 1 | 2 |
| W715419-S439 | Trailing Arm Bolt (4 in package 2 required) | 1 | 2 |
| W520516-S441 | Trailing Arm Nut | 2 | 2 |
| W715127-S439 | Upper Control Arm, Lower Control Arm Bolt | 1 | 4 |
| W520517-S440 | Upper Control Arm, Lower Control Arm Nut | 1 | 4 |
| W714516-S439 | Wheel Hub Bolt | 2 | 8 |
| DB5Z-5B759-B | Left Rear Knuckle | 1 | 1 |
| DB5Z-5B758-B | Right Rear Knuckle | 1 | 1 |
| DB5Z-5A972-J | Toe Link Kit | VIN Specific | |
| DB5Z-5A972-K | Toe Link Kit | VIN Specific | |
CERTAIN 2017-2019 MODEL YEAR EXPLORER VEHICLES — REAR WHEEL KNUCKLE
SERVICE PROCEDURE
1. Remove both rear toe links. Please follow the Workshop Manual (WSM) procedures in Section 204-02.
2. Replace both rear wheel knuckles. Please follow the WSM procedures in Section 204-02.
• Do not install the wheels and tires or perform an alignment at this time.
3. Install both new rear toe links. Please follow the WSM procedures in Section 204-02.
4. Perform the alignment to check and correct rear toe and camber. Please follow the WSM procedures in Section 204-00.
IMPORTANT NOTE: Federal law prohibits selling motor vehicle parts or components that are under safety, compliance, or emissions recall. Unless a part is requested to be returned to Ford
, all parts replaced under this FSA must be scrapped in accordance with all applicable local, state and federal environmental protection and hazardous material regulations. Refer to the Parts Retention, Return, & Scrapping section of the FSA dealer bulletin for further information.
SEOCONTENT-START
© Copyright 2021 Ford
Motor Company
David J. Johnson Ford
Motor Company
Director P. O. Box 1904
Service Engineering Operations Dearborn, Michigan 48121
Ford
Customer Service Division
March 1, 2021
TO: All U.S. Ford
and Lincoln
Dealers
SUBJECT: Customer Satisfaction Program 21B13
Certain 2017-2019 Model Year Explorer Vehicles
Rear Wheel Knuckle and Toe Link Replacement
PROGRAM TERMS
This program will be in effect through May 31, 2021. There is no mileage limit for this program.
AFFECTED VEHICLES
Vehicle Model Year Assembly Plant Build Dates
Explorer 2017-2019 Chicago January 27, 2017 through September 16, 2018
Affected vehicles are identified in OASIS and FSA VIN Lists.
REASON FOR THIS PROGRAM
This program is a proactive investigation by Ford
Motor Company to obtain field parts for testing.
Ford
is voluntarily conducting this program to replace both rear toe links and wheel knuckles on
vehicles always registered and always residing in the Detroit (and Toronto) area. The replacement
toe links and knuckles being installed contain no enhancements and are identical to the parts being
removed. It is very important that parts obtained from this program be returned to Ford
for this study.
SERVICE ACTION
Dealers are to replace both rear toe links and wheel knuckles and return the parts for analysis. This
service must be performed on all affected vehicles at no charge to the vehicle owner.
OWNER NOTIFICATION MAILING SCHEDULE
Owner letters are expected to be mailed the week of March 15, 2021. Dealers should repair any
affected vehicles that arrive at their dealerships, whether or not the customer has received a letter.
ATTACHMENTS
Attachment I: Administrative Information
Attachment II: Labor Allowances and Parts Ordering Information
Attachment III: Technical Information
Owner Notification Letter
© Copyright 2021 Ford
Motor Company
QUESTIONS & ASSISTANCE
For questions and assistance, contact the Special Service Support Center (SSSC) via the SSSC Web
Contact Site. The SSSC Web Contact Site can be accessed through the Professional Technician
System (PTS) website using the SSSC link listed at the bottom of the OASIS VIN report screen or
listed under the SSSC tab.
Sincerely,
David J. Johnson
© Copyright 2021 Ford
Motor Company
ATTACHMENT I
Page 1 of 2
Customer Satisfaction Program 21B13
Certain 2017-2019 Model Year Explorer Vehicles
Rear Wheel Knuckle and Toe Link Replacement
OASIS ACTIVATION
OASIS will be activated on March 1, 2021.
FSA VIN LISTS ACTIVATION
FSA VIN Lists will be available through https://web.fsavinlists.dealerconnection.com on March 1,
2021. Owner names and addresses will be available by March 29, 2021.
NOTE: Your FSA VIN Lists may contain owner names and addresses obtained from motor vehicle
registration records. The use of such motor vehicle registration data for any purpose other than in
connection with this program is a violation of law in several states, provinces, and countries.
Accordingly, you must limit the use of this listing to the follow-up necessary to complete this service
action.
SOLD VEHICLES
• Owners of affected vehicles will be directed to dealers for repairs.
• Immediately contact any of your affected customers whose vehicles are not on your VIN list
but are identified in OASIS. Give the customer a copy of the Owner Notification Letter (when
available) and schedule a service date.
• Correct other affected vehicles identified in OASIS which are brought to your dealership.
• Dealers are to prioritize repairs of customer vehicles over repairs of new and used vehicle
inventory.
STOCK VEHICLES
• Correct all affected units in your new vehicle inventory before delivery.
• Use OASIS to identify any affected vehicles in your used vehicle inventory.
TITLE BRANDED / SALVAGED VEHICLES
Affected title branded and salvaged vehicles are eligible for this service action.
OWNER REFUNDS
Refunds are not approved for this program.
RENTAL VEHICLES
Rental vehicles are not approved for this program.
© Copyright 2021 Ford
Motor Company
ATTACHMENT I
Page 2 of 2
Customer Satisfaction Program 21B13
Certain 2017-2019 Model Year Explorer Vehicles
Rear Wheel Knuckle and Toe Link Replacement
ADDITIONAL REPAIR (LABOR TIME AND/OR PARTS)
Additional repairs identified as necessary to complete the FSA should be managed as follows:
• For related damage and access time requirements, refer to the Warranty and Policy Manual /
Section 6 – Ford
& Lincoln
Program Policies / General Information & Special Circumstances
for FSA’s / Related Damage.
• For vehicles within new vehicle bumper-to-bumper warranty coverage, no SSSC approval is
required, although related damage must be on a separate repair line with the “Related
Damage” radio button checked.
o Ford
vehicles – 3 years or 36,000 miles
• For vehicles outside new vehicle bumper-to-bumper warranty coverage, submit an Approval
Request to the SSSC Web Contact Site prior to completing the repair.
CLAIMS PREPARATION AND SUBMISSION
• Claim Entry: Enter claims using Dealer Management System (DMS) or One Warranty
Solution (OWS) online.
o When entering claims:
▪ Claim type 31: Field Service Action. The FSA number 21B13 is the sub code.
o For additional claims preparation and submission information, refer to the Recall and
Customer Satisfaction Program (CSP) Repairs in the OWS User Guide.
• Related Damage/Additional labor and/or parts: Must be claimed as Related Damage on a
separate repair line from the FSA with same claim type and sub code as described in Claim
Entry above.
IMPORTANT: Click the Related Damage Indicator radio button.
© Copyright 2021 Ford
Motor Company
ATTACHMENT II
Page 1 of 2
Customer Satisfaction Program 21B13
Certain 2017-2019 Model Year Explorer Vehicles
Rear Wheel Knuckle and Toe Link Replacement
LABOR ALLOWANCES
Description Labor Operation Labor Time
Replace Both Rear Wheel Knuckles, Toe Links, and Adjust
Rear Toe and Camber – AWD
21B13B 3.5 Hours
Replace Both Rear Wheel Knuckles, Toe Links, and Adjust
Rear Toe and Camber – FWD
21B13C 3.1 Hours
PARTS REQUIREMENTS / ORDERING INFORMATION
Part Number Description
Order
Quantity
Claim
Quantity
-W712435-S439 Wheel Hub Nut – AWD Only 1 2
PM-4-A Brake Parts Cleaner As Required
-W710681-S439 Brake Caliper Bolts 2 4
-W708733-S439 Brake Disk Retainer Bolt (4 in package 2 required) 1 2
-W520213-S440 Rear Stabilizer Link Nut 1 2
-W714033-S439 Shock Absorber Bolt (4 in package 2 required) 1 2
-W715419-S439 Trailing Arm Bolt (4 in package 2 required) 1 2
-W520516-S441 Trailing Arm Nut 2 2
-W715127-S439 Upper Control Arm, Lower Control Arm Bolt 1 4
-W520517-S440 Upper Control Arm, Lower Control Arm Nut 1 4
-W714516-S439 Wheel Hub Bolt 2 8
DB5Z-5B759-B Left Rear Knuckle 1 1
DB5Z-5B758-B Right Rear Knuckle 1 1
DB5Z-5A972-J Toe Link Kit VIN Specific
DB5Z-5A972-K Toe Link Kit VIN Specific
Order your parts requirements through normal order processing channels. To guarantee the shortest
delivery time, an emergency order for parts must be placed.
DEALER PRICE
For latest prices, refer to DOES II.
© Copyright 2021 Ford
Motor Company
ATTACHMENT II
Page 2 of 2
Customer Satisfaction Program 21B13
Certain 2017-2019 Model Year Explorer Vehicles
Rear Wheel Knuckle and Toe Link Replacement
PARTS RETENTION, RETURN, & SCRAPPING
Follow the provisions of the Warranty and Policy Manual, Section 1 – WARRANTY PARTS
RETENTION AND RETURN POLICIES. If a replaced part receives a scrap disposition, the part must
be scrapped in accordance with all applicable local, state and federal environmental protection and
hazardous material regulations. Federal law prohibits selling motor vehicle parts or components that
are under safety, compliance, or emissions recall.
EXCESS STOCK RETURN
Excess stock returned for credit must have been purchased from Ford
Customer Service Division in
accordance with Policy Procedure Bulletin 4000.
ATTACHMENT III
PAGE 1 OF 1
CUSTOMER SATISFACTION PROGRAM 21B13
CPR © 2021 FORD
MOTOR COMPANY
DEARBORN, MICHIGAN 48121
03/2021
CERTAIN 2017-2019 MODEL YEAR EXPLORER VEHICLES — REAR WHEEL
KNUCKLE
SERVICE PROCEDURE
1. Remove both rear toe links. Please follow the Workshop Manual (WSM) procedures in Section 204-02.
2. Replace both rear wheel knuckles. Please follow the WSM procedures in Section 204-02.
• Do not install the wheels and tires or perform an alignment at this time.
3. Install both new rear toe links. Please follow the WSM procedures in Section 204-02.
4. Perform the alignment to check and correct rear toe and camber. Please follow the WSM procedures in
Section 204-00.
IMPORTANT NOTE: Federal law prohibits selling motor vehicle parts or components that are
under safety, compliance, or emissions recall. Unless a part is requested to be returned to Ford
, all
parts replaced under this FSA must be scrapped in accordance with all applicable local, state and
federal environmental protection and hazardous material regulations. Refer to the Parts Retention,
Return, & Scrapping section of the FSA dealer bulletin for further information.
© Copyright 2021 Ford
Motor Company
Ford
Motor Company
Ford
Customer Service Division
P. O. Box 1904
Dearborn, Michigan 48121
March 2021
Customer Satisfaction Program 21B13
Mr. John Sample
123 Main Street
Anywhere, USA 12345
Your Vehicle Identification Number (VIN): 12345678901234567
At Ford
Motor Company, we are committed not only to building high quality, dependable products, but
also to building a community of happy, satisfied customers. To demonstrate that commitment, we
have pre-selected your vehicle to replace both rear toe links and wheel knuckles free of charge as
part of an important safety research study. Ford
understands that supporting this effort can be an
inconvenience, but asks that you contribute to this important effort at your earliest convenience. Your
participation will help ensure your safety and the safety of others who may be involved in a crash.
This is not a safety recall. We are collecting these parts to confirm their performance after being in
service in your vehicle for many years.
Why are you receiving
this notice?
This program is a proactive effort to gather certain rear toe links and wheel
knuckles for research. Ford
Motor Company is voluntarily conducting this
program to obtain field parts from certain geographic locations for testing
and evaluation.
This program will expire without notice once sufficient parts have been
gathered to complete the required research.
What will Ford
and
your dealer do?
For the purposes of this research program, Ford
Motor Company has
authorized your dealer to remove the rear toe links and wheel knuckles from
your vehicle and replace them with new parts free of charge. The new
replacement toe links and knuckles being installed contain no enhancements
and are identical in design and construction to the toe links and knuckles
being removed. Because the replacement parts are new, the principal
difference between the old and new parts is that your present toe links and
knuckles have been in service on your vehicle.
How long will it take? The time needed to exchange your old rear toe links and wheel knuckles for
new parts is less than one-half day. However, due to service scheduling
requirements, your dealer may need your vehicle for a longer period of time.
What should you do? Please call your dealer without delay to schedule a service appointment for
Customer Satisfaction Program 21B13. Provide the dealer with your VIN,
which is printed near your name at the beginning of this letter.
© Copyright 2021 Ford
Motor Company
If you do not already have a servicing dealer, you can access owner.ford
.com
for dealer addresses, maps, and driving instructions.
NOTE: You can receive information about Recalls and Customer
Satisfaction Programs through our FordPass App. The app can be
downloaded through the App Store or Google Play. In addition there are
other features such as reserving parking in certain locations and controlling
certain functions on your vehicle (lock or unlock doors, remote start) if it is
equipped to allow control.
COVID-19
(CORONAVIRUS)
Ford
dealerships have implemented enhanced protocols to ensure both your
safety and the safety of dealership employees. This includes specific
procedures for cleaning and disinfecting customer vehicles before and after
each vehicle is serviced. In most places, vehicle service has been deemed a
critical service. Please contact your local dealer to confirm current service
hours. For more information on how Ford
and your local dealer are working
hard to keep you on the road during these challenging times, please visit
owner.ford
.com.
What if you no longer
own this vehicle?
If you no longer own this vehicle, and have an address for the current owner,
please forward this letter to the new owner.
You received this notice because our records, which are based primarily on
state registration and title data, indicate that you are the current owner.
Can we assist you
further?
If you have difficulties getting your vehicle repaired promptly and without
charge, please contact your dealership’s Service Manager for assistance.
RETAIL OWNERS: If you have questions or concerns, please contact our
Ford
Customer Relationship Center at 1-866-436-7332 and one of our
representatives will be happy to assist you. If you wish to contact us through
the Internet, our address is: owner.ford
.com
For the hearing impaired call 1-800-232-5952 (TDD). Representatives are
available Monday through Friday: 8:00AM – 8:00PM (Eastern Time).
FLEET OWNERS: If you have questions or concerns, please contact our
Fleet Customer Information Center at 1-800-34-FLEET, choose Option
#3, and one of our representatives will be happy to assist you. If you wish to
contact us through the Internet, our address is: fleet.ford
.com.
Representatives are available Monday through Friday: 8:00AM – 8:00PM
(Eastern Time).
Thank you for your attention to this important matter.
Ford
Customer Service Division
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Customer Satisfaction Program 21B13
March 1, 2021
MC-10189764-0001.pdf 325.938KB
- 【Front End Suspension Kit Fitment】2011-2017 for Ford
Explorer, 2013-2017 for Ford
Police Interceptor Utility - 【Replacement Suspension Kit Include】8pc Set Suspension Kit; 1 x K622215 Front Lower Control Arm And Ball Joint - Passenger Side, 1 x K622216 Front Lower Control Arm And Ball Joint - Driver Side, 2 x ES800952 Front Outer Tie Rod End, 2 x EV800893 Front Inner Tie Rod End, 1 x K750616 Front Sway Bar End Link - Passenger Side, 1 x K750617 Front Sway Bar End Link - Driver Side
- 【Top Quality】Steering Suspension Kit is made of high-quality material, which is heat processed to increase strength and strong wear resistance, pre-greased socket and pre-installed boot keep dirt and water out for reliable performance and long life
- 【Buyer's Guide】Suspension kit complete full set typically includes control arms, idler arm, pitman arm, tie rod ends, sway bar links and ball joints,etc.All of our replacement suspension parts come pre-greased for reduced friction and long life, and will require no additional work. If you have any problems during the installation or use, we will supply you with professional technical guide
- 【Note】SCITOO Auto provides 1 year replacement support, we supply premium quality suspension kit for most cars, SUVs, trucks and trailers. Please select your vehicle (year/make/model/trim) in the Part Finder to confirm compatibility, or see compatible vehicles in the description
- Control Arms Replacement for Ford
2011 2012 2013 2014 2015 2016 2017 2018 2019 Explorer - [for Ford 2013 2014 2015 2016 2017 2018 2019 Police Interceptor Utility] - Suspension Kit Includes: 2x Front Lower Control Arms w/Ball Joints Assembly + 4x Front and Rear Stabilizer / Sway Bar End Links + 2x Front Outer Tie Rod Ends + 2x Front Inner Tie Rod End Links
- Detroit Axle Suspension components are ready to meet the rigorous demands of today's foreign and domestic passenger cars, trucks, and SUVs
- Undergo impact, wear, and fatigue testing to help ensure quality and durability
- 10-YEAR WARRANTY
- 【12pc Set Suspension Kit Fitment】2011-2019 for Ford
Explorer, 2013-2019 for Ford
Police Interceptor Utility - 【Suspension Kit Include】1 x K622215 Front Lower Control Arm And Ball Joint - Passenger Side, 1 x K622216 Front Lower Control Arm And Ball Joint - Driver Side, 2 x ES800952 Front Outer Tie Rod End, 2 x EV800893 Front Inner Tie Rod End, 1 x K750393 Rear Sway Bar End Link - Driver Side, 1 x K750394 Rear Sway Bar End Link - Passenger Side, 1 x K750616 Front Sway Bar End Link - Passenger Side, 1 x K750617 Front Sway Bar End Link - Driver Side, 2 x Front Steering Rack Boot
- 【When To Replace Suspension Kit】It's time to replace your suspension kit if you experience any of the following: ① Steering noise sounds when turning ② Feeling every bump ③ Difficulty when steering
- 【Suspension Kit Buyer's Guide】A complete suspension kit typically includes control Arm, idler arm, pitman arm, tie rod end,sway bar link, ball joint, center link, track bar, tie rod link,boot,bushing,ect. All of our suspension parts have been pregreased, require no more additional work
- 【Premium Quality Parts】SCITOO Auto Part select premium quality material to help ensure quality and durability & 1 year replacement.Our suspension kit fit for CARS,SUVS,TRUCKS,TRAILERS.Please make sure your vehicle matches this kit before buying. Select your vehicle (Year/Make/Model/Trim )in the top left corner of the page to confirm compatibility,or see more compatible vehicles in the description
- For Use With One-Piece Right Upper Control Arm Design
- Front Control Arms Kit Replacement for Ford
Explorer 1998-2001 - [for Ford Ranger (w / Torsion Bar Suspension) 1998-2011] - 1999 Mazda B2500 (2WD; w / Torsion Bar Suspension) - [1998-2007 Mazda B3000 (w / Torsion Bar Suspension)] - 1998-2009 Mazda B4000 (w / Torsion Bar Suspension) - [1998-2000 Mercury Mountaineer (w / Torsion Bar Suspension)] - 2001 Mercury
Mountaineer - Control Arms Kit Includes: 4x Front Upper & Lower Control Arms w/Ball Joints + 4x Front Inner & Outer Tie Rod Ends + 2x Front Sway Bars + 2x Rack & Pinion Tie Rod Boots + Bellows
- Detroit Axle Suspension Components are Ready to Meet the Rigorous Demands of Today's Foreign and Domestic Passenger Cars, Trucks, and SUVs
- The Products Undergo Impact, Wear, and Fatigue Testing to Help Ensure Quality and Durability
- [Vehicle-Specific Fit]: for 2011-2018 Ford
Explorer, for 2013-2018 Police Interceptor Utility - [Comprehensive Component Set]: 1 x Front Lower Control Arm And Ball Joint - Passenger Side( K622215), 1 x Front Lower Control Arm And Ball Joint - Driver Side( K622216), 2 x Front Outer Tie Rod End( ES800952), 2 x Front Inner Tie Rod End( EV800893), 1 x Front Sway Bar End Link - Passenger Side( K750616), 1 x Front Sway Bar End Link - Driver Side( K750617)
- [Factory-Matched Part Numbers]:K622215, K622216, ES800952, EV800893, K750616, K750617
- [Enhanced Performance Design]: Constructed with heavy-duty steel arms and urethane bushings to reduce vibration, noise, and improve handling. Enjoy smoother rides and precise steering control
- [Hassle-Free Installation]: Engineered for direct fitment with precise alignment, ensuring a smooth installation process without additional modifications. Designed for DIY enthusiasts and professional mechanics alike, making suspension replacement quick and efficient
Last update on 2026-06-03 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.








