Service bulletin SSM 53966
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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11019702 |
| Published by NHTSA | 2025-06-24 |
| Manufacturer's number | SSM 53966 |
| Manufacturer's date | 2025-06-20 |
| NHTSA component | ELECTRICAL SYSTEM; UNKNOWN OR OTHER |
| Manufacturer's system | SYNC4 |
NHTSA's summary
Some 2021-2025 Ford/ Lincoln vehicles equipped with SYNC4 may not be able to perform an update to the accessory protocol interface module (APIM). This may be due to the software in the APIM. Ford Engineering has de-activated the ability to update these SYNC4 APIM modules as applicable, and the Ford Diagnosis and Repair System (FDRS) will not present an update for the APIM module. Some existing directed repairs may be impacted, check Professional Technician System (PTS) before attempting any specific technical service bulletin (TSB)/special service message (SSM) and check field service action (FSA) landing pages before attempting any FSA repairs. For any vehicle repairs requiring a software update that includes an APIM update in the programming sequence, if the 5-digit product code for the APIM software is equal to or lower than 23187, do not attempt to update affected modules at this time. To determine the 5-digit product code for the APIM software on the vehicle, while the vehicle center display screen is powered up with ignition in run or accessory, go to Settings > General > About SYNC.
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
Electrical system
| FORD BRONCO | 2021, 2022, 2023 |
|---|---|
| FORD BRONCO SPORT | 2021 |
| FORD EDGE | 2021, 2022, 2023 |
| FORD ESCAPE | 2023, 2024 |
| FORD EXPEDITION | 2022, 2023, 2024 |
| FORD EXPLORER | 2021, 2022 |
| FORD F-150 | 2021, 2022, 2023 |
| FORD F-250 SD | 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| FORD F-350 SD | 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| FORD F-450 SD | 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| FORD F-550 SD | 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| FORD MUSTANG | 2024 |
| FORD MUSTANG MACH E | 2021, 2022, 2023 |
| FORD RANGER | 2022 |
| FORD TRANSIT | 2022, 2023, 2024 |
| FORD redundant F-250 | 2022 |
| LINCOLN CORSAIR | 2022, 2023 |
| LINCOLN MKX | 2007 |
| LINCOLN NAUTILUS | 2021, 2022, 2023 |
| LINCOLN NAVIGATOR | 2022, 2023 |
| LINCOLN NAVIGATOR | 2025 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 26V582000 | 2026-09-09. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:MANAGEMENT SYSTEM/ENERGY CONTROL MODULE (BMS/BECM):SOFTWARE |
|---|---|
| 2026408 | 2026-08-25. Electrical |
| 26V547000 | 2026-08-25. ELECTRICAL SYSTEM:WIRING |
| 2026356 | 2026-07-20. Electrical |
| 26V468000 | 2026-07-20. ENGINE; ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD |
| 26V165000 | 2026-03-18. ELECTRICAL SYSTEM:ADAS; BACK OVER PREVENTION:SOFTWARE |
| 26V104000 | 2026-02-20. EXTERIOR LIGHTING:TAIL LIGHTS; ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL |
| 26V091000 | 2026-02-17. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY |
| 2026005 | 2026-01-09. Electrical |
| 25V789000 | 2025-11-14. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| SSM 55240 | 2026-10-13. Service bulletin. Some 2021-2024 Bronco vehicles may exhibit an illuminated red brake warning indicator with diagnostic trouble code (DTC) C0049:01 stored in the anti-lock brake system (ABS) module. This may be due to pin fitment at the brake fluid level sensor connector. To resolve this concern, replace the brake fluid reservoir and replace the brake fluid level sensor electrical connector C1052 with service pigtail wiring kit 3U2Z-14S411-BXAB. For claiming, use causal part 2L210 and labor operations 2140A and 2219D45WR. |
|---|---|
| SSM 55239 | 2026-10-13. Service bulletin. Some 2023-2026 F-Super Duty vehicles equipped with a trailer brake control module and built on or before 08-May-2026 may exhibit a "Trailer Disconnected" message after cycling the ignition off and back on with a trailer connected. This may be due to the presence of an integrated battery charger on a trailer equipped with electric over hydraulic brakes. If trailer functionality is restored after unplugging and plugging the trailer connector back in while the ignition is on, this condition can be corrected by downloading and performing the "Trailer Brake Configuration" application using the latest software version of the Ford Diagnosis and Repair System (FDRS) scan tool. For claiming, use causal part 19H332 and labor operations 12651D and 12651D4. Workshop Manual (WSM), Section 417-01 Exterior Lighting > Diagnosis and Testing > Trailer Lamps > Pinpoint Test G The Message Center Displays A False Trailer Disconnected Message When A Trailer Is Connected To The Vehicle - Only For Electric Over Hydraulic (EOH) Equipped Trailers When Vehicle Trailer Brake Type Setting Is Set To Electric Over Hydraulic has bee |
| TSB 26-2375 v2 | 2026-10-13. Service bulletin. NOTE: This bulletin has been updated, refer to the change log at the bottom for details. Issue: Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: • Poor shift quality • Illuminated powertrain malfunction (wrench) indicator with DTCs P2704 and P0771 stored in the PCM / TCM . This may be due to a calibration in the TCM and/or wear between the input shaft and the E clutch hub causing theinput shaft O-rings to become damaged resulting in an open E clutch circuit. Action: For vehicles that meet all of the criteria in the Issue and Model statements, follow the Service Procedure toreprogram the PCM / TCM and/or replace the E clutch hub and input shaft O-rings |
| SSM 55221 | 2026-10-12. Service bulletin. For 20222026 vehicles equipped with a 8F35 transmission, a revision to the Road Testing Vehicle procedure has been made in the WSM, Section 307-01 > Diagnosis and Testing. This updated procedure improves the diagnosis of customer reported transmission concerns and aids in locating the proper root cause. During diagnosis and testing, details regarding whether the condition is more prevalent when the vehicle is hot or cold, throttle percentage at the time of occurrence, vehicle speed, the specific shift involved, and whether the issue occurs during transmission engagements (N>R, N>D, R>D, and/or D>R) should be noted in the warranty claim. Engineering requests including these detailed operating conditions that will significantly assist with root cause analysis. Diagnosis, testing, and repair should use established labor times outside this article. |
| SSM 55220 | 2026-10-12. Service bulletin. Some 2024-2026 Nautilus and 2025-2026 Explorer/Aviator/Expedition/Navigator vehicles may experience Android Auto connection or general Bluetooth pairing concerns for both Android and IOS after an APIM software update. This may be due to the APIM software. To temporarily correct the issue:<br /><br /> * For Android Auto related issues: Clear Android Auto app storage in the center display screen. Vehicle Settings > Settings > Apps > Android Auto > Clear Storage. <br /> * For general Bluetooth connectivity issues: Clear Contacts Storage app storage in the center display screen. Vehicle Settings > Apps > Uncheck hide system apps > Contacts Storage > Clear Storage.<br /><br /> If the condition persists, perform a master reset from the center display screen, remove the vehicle from the phone, then re-pair the device.<br /><br /> If the condition continues to persist, refer to Workshop Manual (WSM), Section 415-00 for normal diagnostics and repair as necessary outside of this article.<br /><br /> If the condition is resolved, inform customers that engineering is currently working on a permanent solution |
| TSB 26-2325 | 2026-10-05. Service bulletin. Some of the vehicles listed in the Model statement above may exhibit a front courtesy lamp that is inoperative. This may be due to a concern with the front courtesy lamp light module. |
| DDM-PDM-26.21.7 Exped&Nav | 2026-10-02. Over-the-air update. Quality improvements include: -Software update to improve responsiveness of the door control system after the vehicle enters a low-power state |
| DSM-26.5.7.2 Exped&Nav | 2026-10-02. Over-the-air update. Quality improvements include: -Steering column memory calibration update to minimize unnecessary contact with mechanical hard stops |
| 26B07 | 2026-10-02. Other. Recommended Repair Prior to Sale Customer Satisfaction Program 26B07 Certain 2021-2025 Model Year F-150 Lightning and Mustang Mach-E Vehicles Undesired Acceleration Due to Adaptive Cruise Control (ACC) Activation |
| TSB 26-2428 | 2026-10-02. Service bulletin. This bulletin supersedes 25-2326. Reason for update: update the service procedure to include the fuel tank isolation valve replacement, update the causal part number, and increase the labor time allowance to include the fuel tank isolation valve replacement. Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P2450 stored in the powertrain control module (PCM). This may be due to the software in the PCM and/or the fuel tank isolation valve. |