NHTSA ID Number: 10209209
Manufacturer Communication Number: TSB 22-2104
Summary
This article supersedes TSB 21-2236 to update the models and year affected. Some 2013-2018 C-Max, 2013-2020 Fusion/MKZ, 2013-2022 Escape, 2015-2018 Focus, 2015-2019 MKC, 2015-2022 Edge/F150/Mustang
, 2016-2018 MKX, 2016-2019 Explorer, 2017-2022 F-Super Duty, 2018-2022 EcoSport/Expedition, 2019-2022 Ranger/Nautilus, 2021-2022 Bronco/Bronco Sport/Mustang
Mach-E, 2022 Maverick vehicles may experience seat pan looseness, lateral movement, or a clunk/thump noise on turns. This may be due to the seat pan track. To correct the condition, follow the Service Procedure steps to install a reinforcement.
This bulletin supersedes 21-2236.
Model:
2021-2022 Bronco
2021-2022 Bronco Sport
2013-2018 C-MAX Hybrid
2018-2021 EcoSport
2015-2022 Edge
2013-2022 Escape
2018-2022 Expedition
2016-2019 Explorer
2015-2022 F-150
2017-2022 F-Super Duty
2015-2018 Focus
2013-2020 Fusion
2022 Maverick
2015-2022 Mustang![]()
2021-2022 Mustang
Mach-E
2019-2022 Ranger
2015-2019 MKC
2016-2018 MKX
2013-2020 MKZ
2019-2022 Nautilus
Summary
This article supersedes TSB 21-2236 to update the models and year affected.
Issue: Some 2013-2018 C-Max, 2013-2020 Fusion/MKZ, 2013-2022 Escape, 2015-2018 Focus, 2015-2019 MKC, 2015-2022 Edge/F-150/Mustang
, 2016-2018 MKX, 2016-2019 Explorer, 2017-2022 F-Super Duty, 2018-2022 EcoSport/Expedition, 2019-2022 Ranger/Nautilus, 2021-2022 Bronco/Bronco Sport/Mustang
Mach-E, 2022 Maverick vehicles may experience seat pan looseness, lateral movement, or a clunk/thump noise on turns. This may be due to the seat pan track. To correct the condition, follow the Service Procedure steps to install a reinforcement.
Action: Follow the Service Procedure to correct the condition on vehicles that meet the following criteria:
- One of the following vehicle lines:
-
- 2013-2018 C-Max
-
- 2013-2020 Fusion/MKZ
-
- 2013-2022 Escape
-
- 2015-2018 Focus
-
- 2015-2022 Edge/F-150/MKC/Mustang

- 2015-2022 Edge/F-150/MKC/Mustang
-
- 2016-2018 MKX
-
- 2016-2019 Explorer
-
- 2017-2022 F-Super Duty
-
- 2018-2022 EcoSport/Expedition
-
- 2019-2022 Ranger/Nautilus
-
- 2021-2022 Bronco/Bronco Sport/Mustang
Mach-E
- 2021-2022 Bronco/Bronco Sport/Mustang
-
- 2022 Maverick
- Seat pan looseness, lateral movement, or a clunk/thump noise on turns.
Parts
| Service Part Number | Quantity | Description | Unit of Issue | Piece Quantity |
| W709622-S424 | 1 | Seat Bolts, Rear (Explorer) | 4 | 2 |
| W709428-S424 | 1 | Seat Bolts, Front (Explorer) | 4 | 2 |
| W527404-S300 | 2 Per Affected Seat | 3/8 Inch (9.5 Mm) Wide Host Clamp (Or Equivalent Obtained Locally) | 1 | 2 Per Affected Seat |
| Obtain Locally | 2 Per Affected Seat | 3/4 Inch (19 Mm) Diameter Heater Hose, 1 Inch (25.4 Mm) Long | 2 Per Affected Seat |
Quantity refers to the amount of the service part number required to repair the vehicle.
Unit of Issue refers to the number of individual pieces included in a service part number package.
Piece Quantity refers to the total number of individual pieces required to repair the vehicle.
Service Procedure
1. Does the customer complain of the seat track exhibiting lateral movement on sharp turns causing a clunk/thump type feeling or noise?
(1). Yes – proceed to Step 2. Apply this procedure to the affected front seats.
(2). No – this article does not apply. Refer to Workshop Manual (WSM), Section 501-10A for normal diagnostics.
2. Using both height and front tilt functions, adjust the seat to the highest position.
3. Is the seat equipped with a front trim valance?
(1). Yes – remove the front seat for seat track access. Refer to WSM, Section 501-10A. Proceed to Step 4.
(2). No – proceed to Step 4.
4. Is the vehicle equipped with a power seat control module under the seat? (Figure 1)
(1). Yes – remove the 2 power seat control module retaining screws and remove the power seat control module.
(2). No – proceed to Step 5.
Figure 1

5. Cut a 25.4 mm (1 in.) long section of 19 mm (3/4 in.) diameter heater hose. (Figure 2)
Figure 2

6. Cut a slit in the 25.4 mm (1 in.) piece. (Figure 3)
Figure 3

7. Install the hose over the front cross tube. (Figure 4)
Figure 4

8. Open the hose clamp and slip the hose clamp over the heater hose to secure the heater hose to the front cross tube. (Figure 5)
Figure 5

9. Push the heater hose up against the handcuff bracket and tighten the hose clamp to 3.7 Nm (33 in-lbs). (Figures 6-9) See Figures 6-7 for clamp orientation.
Figure 6

Figure 7

Figure 8

Figure 9

10. Repeat Steps 5 through 9 on the other side of the seat track. (Figure 10)
Figure 10

11. Reinstall the power seat control module if equipped. Refer to WSM, Section 501-10A.
12. Reinstall the seat if equipped with valance. Refer to WSM, Section 501-10A.
151 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| FORD | BRONCO | 2021-2022 |
| FORD | BRONCO SPORT | 2021-2022 |
| FORD | C-MAX | 2013-2018 |
| FORD | ECOSPORT | 2018-2021 |
| FORD | EDGE | 2015-2022 |
| FORD | ESCAPE | 2013-2022 |
| FORD | EXPEDITION | 2018-2022 |
| FORD | EXPLORER | 2016-2019 |
| FORD | EXPLORER POLICE INTERCEPT | 2016-2019 |
| FORD | F-150 | 2015-2022 |
| FORD | F-250 SD | 2017-2022 |
| FORD | F-350 SD | 2017-2022 |
| FORD | F-450 SD | 2017-2022 |
| FORD | F-550 SD | 2017-2022 |
| FORD | FOCUS | 2015-2018 |
| FORD | FUSION | 2013-2020 |
| FORD | FUSION ENERGI | 2013-2020 |
| FORD | FUSION HYBRID | 2013-2020 |
| FORD | MAVERICK | 2022 |
| FORD | MUSTANG | 2015-2022 |
| FORD | MUSTANG | 2021-2022 |
| FORD | RANGER | 2019-2022 |
| LINCOLN | MKC | 2015-2019 |
| LINCOLN | MKX | 2016-2021 |
| LINCOLN | MKZ | 2013-2020 |
| LINCOLN | MKZ HYBRID | 2013-2020 |
| LINCOLN | NAUTILUS | 2019-2022 |
1 Associated Document
Manufacturer Communications
22-2104
18 March 2022
MC-10209209-0001.pdf 481.751KB
NHTSA ID Number: 10199536
Manufacturer Communication Number: TSB 21-2236
Summary
Some 2013-2018 C-Max, 2013-2020 Fusion/MKZ, 2013-2021 Escape, 2015-2018 Focus, 2015-2019 MKC, 2015-2021 Edge/F150/Mustang
, 2016-2018 MKX, 2016-2019 Explorer, 2017-2021 F-Super Duty, 2018-2021 EcoSport/Expedition, 2019-2021 Ranger/Nautilus, 2021 Bronco Sport/Mustang
Mach-E vehicles may experience seat pan looseness, lateral movement, or a clunk/thump noise on turns. This may be due to the seat pan track. To correct the condition, follow the Service Procedure steps to install a reinforcement.
1 Associated Document
Manufacturer Communications
21-2236
21 July 2021
MC-10199536-0001.pdf 483.006KB
NHTSA ID Number: 10175895
Manufacturer Communication Number: TSB 20-2171
Summary
Some 2013-2018 C-Max, 2013-2020 Escape/Fusion/MKZ, 2015-2018 Focus,2015-2019 MKC, 2015-2020 Edge/F150/Mustang
, 2016-2018 MKX, 2016-2019 Explorer, 2017-2020 F-Super Duty, 2018-2020 EcoSport/Expedition, 2019-2020 Ranger/Nautilus vehicles may experience seat pan looseness, lateral movement, or a clunk/thump noise on turns. This may be due to the seat pan track. To correct the condition, follow the Service Procedure steps to install a reinforcement.
1 Associated Document
Manufacturer Communications
20-2171
15 May 2020
MC-10175895-0001.pdf 1465.569KB
NHTSA ID Number: 10153931
Manufacturer Communication Number: TSB 18-2361
Summary
Some 2013-2018 C-Max, 2013-2019 Escape/Fusion/MKZ, 2015-2018 Focus, 2015-2019 Edge/F150/MKC/Mustang
, 2016-2018 MKX, 2016-2019 Explorer, 2017 Super Duty, 2018-2019 EcoSport/Expedition, and 2019 Nautilus vehicles may experience seat pan looseness, lateral movement, or clunk/thump noise on turns. Follow the Service Procedure steps to correct the condition.
1 Associated Document
Manufacturer Communications
18-2361
03 December 2018
MC-10153931-9999.pdf 1439.792KB
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Last update on 2026-06-07 / Affiliate links / Images from Amazon Product Advertising API
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Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. Labor Times Description Operation No. Time Vehicles Without Seat Front Trim Valance: Install Heater Hose And Clamp On One (1) Front Seat (Do Not Use With Any Other Labor Operations) 222104A 0.4 Hrs. Vehicles Without Seat Front Trim Valance: Install Heater Hose And Clamp On Both (2) Front Seats (Do Not Use With Any Other Labor Operations) 222104B 0.7 Hrs. Edge, Expedition, Explorer, MKC, MKX/Nautilus, Mustang
Mach-E And MKZ Vehicles Equipped With Seat Front Trim Valance: Install Heater Hose And Clamp On One (1) Front Seat Includes Time To Remove And Install Affected Seat (Do Not Use With Any Other Labor Operations) 222104C 0.7 Hrs. Edge, Expedition, Explorer, MKC, MKX/Nautilus, Mustang
Mach-E And MKZ Vehicles Equipped With Seat Front Trim Valance: Install Heater Hose And Clamp On Both (2) Front Seats Includes Time To Remove And Install Affected Seats (Do Not Use With Any Other Labor Operations) 222104D 1.3 Hrs. Repair/Claim Coding Causal Part: 9661711 Condition Code: 33
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