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Service bulletin TSB 21-2235

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10199535
Published by NHTSA2021-08-02
Manufacturer's numberTSB 21-2235
Manufacturer's date2021-07-22
NHTSA componentSEATS

NHTSA's summary

Some 2017-2020 Continental, 2018-2021 Navigator vehicles may experience seat pan looseness, lateral movement, and/or clunk/thump noise on turns. To correct the condition, follow the Service Procedure steps to install an isolator onto the front cross tube on both front seat tracks.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Seats

Vehicles listed
LINCOLN CONTINENTAL2017, 2018, 2019, 2020
LINCOLN NAVIGATOR2018, 2019, 2020, 2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20262572026-05-27. Seats And Restraints
20251642025-03-28. Seats And Restraints
20240842024-02-11. Seats And Restraints
20233412023-06-09. Seats And Restraints
20202892020-06-24. Seats And Restraints
20V3660002020-06-23. SEATS:MID/REAR ASSEMBLY
18V8050002018-11-14. SEATS:MID/REAR ASSEMBLY

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
SSM 552262026-10-12. Service bulletin. For 2020-2026 Aviator/Corsair and 2018-2026 Navigator vehicles, if diagnostics in Workshop Manual (WSM) Section 501-10A > Front Seats > Diagnosis and Testing lead to the replacement of the front seat cushion extension adjuster, a lower-level part is now available (14C720). It is not necessary to replace the front seat cushion extension adjuster if only the front seat cushion extension motor assembly is damaged. For Corsair, use service part LJ7Z-14C720-A. For Aviator, use service part R2TZ-14C720-A. For 2025-2026 Navigator (both sides) and 2018-2024 Navigator driver side, use service part NL7Z-14C720-A. For 2018-2024 Navigator passenger side, use service part NL7Z-14C720-B.
SSM 551002026-09-01. Service bulletin. For Various Ford and Lincoln vehicles, if diagnostics lead to the replacement of the front seat cushion cover J-clips, lower-level service parts are now available. Use service part W709919-S901 if the J-clip is completely detached from the seat cover and W715386-S424 if the clip is still partially attached. It is not necessary to replace the seat cover if only the J-clip is separating from the cover. Refer to PTS Home > Technical Assistance > Technical Support Videos > Section 501- Body and Paint > Seat J-Clips. For claiming, use causal parts from list below and labor operations 63100A and 63100A5. Causal Parts for claiming: Bronco/Bronco Sport/Escape/Explorer/Expedition/Navigator: 7862900 or 7862901 F-150/F-Super Duty: 1562900 or 1562901 Ranger/Maverick: 6062900 or 6062901
SSM 550372026-07-27. Service bulletin. Some 2018-2024 Expedition and 2018-2027 Navigator vehicles equipped with a rear seat entertainment system/Lincoln Play may experience various system concerns. Rear seat entertainment systems are not on a controller area network (CAN) and are not supported by the Ford Diagnostic and Repair System (FDRS). Certain system concerns may be resolved through software updates which will automatically download once each individual monitor is connected to Wi-Fi. Diagnostic support for rear seat entertainment systems is provided by VOXX electronics. If necessary, contact the VOXX Customer Service Department at 1-866-869-7888. If possible, record the device serial number by selecting the gear/Setup icon > Settings > Device and Software > About. If the unit will not power up, the serial number is on a label on the back of the monitor. It is helpful to know the date the issue occurred, how long the monitors were on prior to the issue, what app/input/media was being used, and if the system software was recently updated prior to the concern starting. For claiming, refer to the Warranty and Policy manual for
TSB 23-23962024-01-05. Service bulletin. This article supersedes TSB 23-2036 to add 2024 vehicle model years. Some 2018-2024 Navigator and Expedition vehicles may exhibit a concern where the second row seat back does not fold down or recline when the recline handle is pulled upward or the second row single seat easy entry seat fold switch is pressed. This concern may occur with vehicles equipped with two or three second row seats. This may be due to a broken recliner release lever. To correct this concern, replace the recliner release lever.
TSB 23-20362023-03-04. Service bulletin. Some 2018-2023 Navigator and Expedition vehicles may exhibit a concern where the second row seat back does not fold down or recline when the recline handle is pulled upward or the second row single seat easy entry seat fold switch is pressed. This concern may occur with vehicles equipped with two or three second row seats. This may be due to a broken recliner release lever. To correct this concern, replace the recliner release lever.
22N03 S12023-02-03. Service bulletin. Certain 2017-2018 Model Year Continental Vehicles Drivers Seat Back Carrier Replacement REASON FOR THIS SUPPLEMENT Service Action: The seat back heating element is now available as a separate component and should be replaced with the seat back foam. Parts List Update: Part numbers have been added for the required seat back heating elements.
SSM 513112023-02-02. Service bulletin. Some 2018-2023 Expedition/Navigator vehicles may have a concern where the second row seat is locked in the forward tilted position while using Easy Entry preventing rearward movement. To unlock the seat, tip the seat back fully forward and slide the seat fully forward to its end of track travel. This will allow the seat to then be free to move rearward. This operation is characteristic to the Easy Entry feature of the second row seats. Do not force the seat rearward while in the locked position as it can result in damage to the seat track. Refer to the vehicle's Owner's Manual for further details.
TSB 22-24802023-01-05. Service bulletin. This article supersedes TSB 17-2203 to update the vehicle model years, Service Procedure, and Part List. Some 2017-2018 Continental vehicles built on or before 22-Sep-2017 may exhibit one or both front seats with an outside bolster that is loose or separating from the seat frame.
22N032022-09-01. Service bulletin. Certain 2017-2018 Model Year Continental Vehicles Drivers Seat Back Carrier Replacement; In some of the affected vehicles, the front driver seat back bolster may crack, resulting in a loose outboard bolster and/or a gap between the foam trim and surrounding plastic. Continued seat use after the seat back bolster is cracked, may result in seat back foam deterioration. Once the bolster is cracked, there is a lack of support on the seat back, and deterioration of the foam may allow the seat heater mat coils to bunch and/or overlap in the mat causing a localized overheat condition
TSB 22-21012022-03-22. Service bulletin. This article supersedes TSB 21-2235 to update the vehicle model years affected. Some 2017-2020 Continental, 2018-2022 Navigator vehicles may experience seat pan looseness, lateral movement, and/or clunk/thump noise on turns. To correct the condition, follow the Service Procedure steps to install an isolator onto the front cross tube on both front seat tracks.