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Service bulletins for the 2021 Ford Mustang

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.

148 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
24B47 S12025-01-03. Other. UNKNOWN OR OTHER. Certain 2018 - 2024 Model Year Various Vehicles Update SYNC Software
TSB 24-23272024-10-29. Service bulletin. UNKNOWN OR OTHER. Some 2020-2022 Mustang Shelby GT500 vehicles may exhibit a transmission fluid leak at the mating surface between the rear transmission fluid cooler tubes and transmission case.
SSM 530402024-10-16. Service bulletin. UNKNOWN OR OTHER. While performing a transmission repair on some 2012-2024 Ford and Lincoln vehicles, a transmission seal kit may be on backorder due to supply chain interruptions. While performing a transmission repair on some 2012-2024 Ford and Lincoln vehicles, a transmission seal kit may be on backorder due to supply chain interruptions.
TSB 24-23042024-10-04. Service bulletin. UNKNOWN OR OTHER. Various Vehicles Equipped With A 10R80 Automatic Transmission - Harsh/Delayed Engagement And/Or Harsh/Delayed Shift - Built On Or Before 15-Aug-2022
23B122024-09-05. Service bulletin. UNKNOWN OR OTHER. Certain 2021-2022 Model Year Mustang Mach E and 2022 Model Year E-Transit High Voltage Battery Module (HVBM) Replacement In all of the affected vehicles, a High Voltage Battery Module (HVBM) was previously replaced using an incorrect Thermal Interface Material (TIM) template. A HVBM that has been serviced using the incorrect TIM template may cause the cells to operate at a temperature higher than design intent, resulting in reduced cell performance and, over time, a progressive reduction in vehicle range that may become noticeable to the driver. This may also result in a malfunction indicator light, DTC code and battery power limiting.
SSM 528202024-09-04. Service bulletin. UNKNOWN OR OTHER. Some 2019-2024 Ford and Lincoln vehicles equipped with a telematics control unit module (TCU) may exhibit the Location toggle button in the Connectivity setting menu grayed out with an inability to switch it off.
TSB 24-22542024-09-02. Service bulletin. POWER TRAIN. Some 2020-2022 Explorer, 2020-2023 Transit, 2021-2022 F-150, 2021-2022 Mustang and 2022 Expedition/Navigator vehicles equipped with a 10R80 transmission (excluding hybrid) may exhibit harsh/delayed engagements and/or harsh/delayed shifts, an illuminated MIL with DTC P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701, P2702, P2703, P2704, P2705, P2707, P2708, P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6 and/or P07F7 stored in the PCM or TCM. This may be due to axial movement of the CDF clutch cylinder (7H351) sleeve causing hydraulic circuit leaks. To correct the condition, follow the Service Procedure to verify hydraulic circuit leakage and replace the CDF clutch cylinder (7H351) if necessary.
24B472024-08-07. Service bulletin. UNKNOWN OR OTHER. Certain 2018 - 2024 Model Year Various Vehicles Update SYNC Software In all the affected vehicles, due to an error in the SYNC software, you may experience SYNC system instability concerns and/or a failure to preserve certain settings across ignition cycles. This may result in a black infotainment screen that does not affect rear view camera, incorrect language setting, erased or unsaved radio presets, and potential inability to perform software updates.
SSM 527222024-08-06. Service bulletin. UNKNOWN OR OTHER. Some 2019-2024 Ford and Lincoln vehicles equipped with SYNC3 may experience various FordPass/LincolnWay connectivity concerns including but not limited to: missing activation prompt (pop-up) on the vehicle's center display screen when attempting to activate vehicle through FordPass/LincolnWay, incorrect location/global positioning system (GPS) reported through FordPass/LincolnWay, problems with remote commands being performed through FordPass/LincolnWay, incorrect data/information reported on FordPass/LincolnWay. These symptoms will be accompanied by diagnostic trouble code (DTC) B156D:89 in the TCU. This may be due the accessory protocol interface module (APIM) software
SSM 527042024-08-05. Service bulletin. UNKNOWN OR OTHER. Some 2019-2024 vehicles equipped with SYNC 3 may experience a programming Error - "INSTL_ERR12" while programming APIM using the Ford Diagnosis and Repair System (FDRS) or experience a frozen screen which says "updating system software" or no progress/response from module using the universal USB updater. This may be due to low memory in the APIM commonly occurring on software level NU5T-14G381-AB/BB. The current software level can be verified in the SYNC tab of Professional Technician System (PTS) or using the vehicle's center display screen, Settings > General > About. To correct the condition, run the universal USB updater. If unsuccessful, using the latest software version of the FDRS scan tool, run the service function "APIM - Reset the Accessory Protocol Interface Module Application" and select "Clear All User Data" option. The center display screen will reboot. As soon as the vehicle's center display screen displays the boot up logo, immediately reinsert the same universal serial bus (USB) drive that was utilized during the prior failed programming attempt.
SSM 526752024-07-03. Service bulletin. UNKNOWN OR OTHER. Some 2019-2024 vehicles equipped with SYNC 3 may experience a programming Error - "INSTL_ERR12" while programming APIM using the Ford Diagnosis and Repair System, or experience a frozen screen which says "updating system software" or no progress/response from module using the universal USB updater. This may be due to low memory in the APIM commonly occurring on software level
TSB 24-21822024-06-13. Service bulletin. UNKNOWN OR OTHER. This article supersedes TSB 23-2307 to update the Service Procedure and vehicle model years affected. Some 2019-2020 Edge/F-150/Fusion/Continental/MKZ/Nautilus, 2019-2021 Transit Connect, 2019-2023 Mustang, 2019-2023 Ranger, 2020-2021 Expedition/Navigator, 2020-2022 Escape/Corsair/Super Duty/EcoSport, 2020-2024 Explorer/Aviator/Transit, 2021-2024 Bronco Sport, 2022-2024 Maverick vehicles with SYNC 3 may experience various SYNC performance related concerns. This may be due to the SYNC Software. To correct the condition, follow the Service Procedure to update theaccesory protocol interface module (APIM) software.
SSM 525862024-06-10. Service bulletin. POWER TRAIN. Some 2018-2023 Mustang vehicles equipped with a 5.0L engine and a 10R80 transmission may exhibit a buck/jerk sensation that may be perceived as an engine misfire during throttle tip-in between 35-45 mph (56-72 km/h) and with the transmission in 8th, 9th, or 10th gear. This buck/jerk sensation is a characteristic of the vehicle and can be compared to a like vehicle that is equipped with a similar powertrain (engine, transmission, and rear end gear ratio) driven in the same manner. A diagnostic trouble code (DTC) will not set because of this condition. If no DTC is set, inform the customer that the vehicle is operating as designed. If a misfire DTC is present, the DTC should be diagnosed first following the correct diagnostic procedure outlined in the Workshop Manual, Section 303-07B.
SSM 525482024-05-23. Service bulletin. POWER TRAIN. Various vehicles equiped with 10R80/10R80 MHT/10R100/10R140 transmissions may require replacement of the seal kits (7153) when internal repairs are being performed. These kits come with 4 wheel drive (4WD) seals and will no longer include the 2WD seals. When working on a 2WD vehicle, any 2WD seals must be ordered separately. Refer to the parts catalog for the proper 2WD seals required.
SSM 525422024-05-23. Service bulletin. ENGINE. Some 2020-2022 Mustang GT500 vehicles may exhibit a lack of power and/or an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P1228. This may be due to the one-way clutch on the supercharger drive assembly. With the supercharger belt removed, a failed one-way clutch within the pulley rotates freely in both directions. The supercharger drive assembly KR3Z-6J022-B is now available as a lower level service part, separate from the supercharger assembly. Refer to the parts catalog and Workshop Manual (WSM), Section 303-12 for installation.
SSM 525022024-05-17. Service bulletin. ENGINE. Some 2020-2022 Mustang GT500 vehicles may exhibit a lack of power and/or an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P1228. This may be due to the one-way clutch on the supercharger drive assembly. With the supercharger belt removed, a failed one-way clutch within the pulley rotates freely in both directions. The supercharger drive assembly KR3Z-6J022-B is now available as a lower level service part, separate from the supercharger assembly. Refer to the parts catalog and Workshop Manual (WSM), Section 303-12D for installation.
SSM 524762024-05-03. Service bulletin. EQUIPMENT. All accessory stick-on keyless entry keypads come with a wallet card containing the master code. If the accessory keypad was factory installed, this card will be placed in the glove box and should be handed to the vehicles owner during initial delivery. Unlike the integrated (wired) factory keypad, the accessory keypad master code cannot be retrieved from the vehicle using a diagnostic scan tool. If the wallet card for an accessory keypad is lost, follow these steps to recover the code. Dealer Key Code access is granted through the Dealer Program Enrollment System (DPES); dealership management can authorize users. The authorized user must go to FMCDealer.com > Parts and Service > Parts Product Line Information > Keys/Entry Devices > Aftermarket Keyless Entry Keypad Code Access. Follow the instructions on the screen to obtain the master code for the accessory keypad.
SSM 524442024-04-29. Service bulletin. POWER TRAIN. Some 2018-2024 Mustang vehicles built on and after 04-Dec-2017 may exhibit a ting, pop, clunk, or click noise from the rear wheel hub when accelerating, applying brakes, or when shifting between drive/reverse (torque reversals). This condition may be caused by stick/slip between the hub and halfshaft interface during the torque reversals creating the ting, pop, clunk, or click noise. To correct the condition, refer to the Workshop Manual (WSM) to replace the halfshaft and hub assembly of the suspected side(s).
SSM 524282024-04-29. Service bulletin. POWER TRAIN. Some 2018-2024 Mustang vehicles built on 04-Dec-2017 and through 01-Oct-2023 may exhibit a ting, pop, clunk, or click noise from the rear wheel hub when accelerating, applying brakes, or when shifting between drive/reverse (torque reversals). This condition may be caused by stick/slip between the hub and halfshaft interface during the torque reversals creating the ting, pop, clunk, or click noise. To correct the condition, refer to the Workshop Manual (WSM) to replace the halfshaft and hub assembly of the suspected side.
SSM 524302024-04-25. Service bulletin. UNKNOWN OR OTHER. Some 2020-2023 Mustang vehicles may exhibit a configuration failure when trying to program a BCM for field service action (FSA) 23C35. This may be due to the Integrated Diagnostic System (IDS) software level. To correct this condition, make sure the IDS software is at R130.04 or newer when configuring the BCM. If the state of charge (SOC) is less than 50%, charge the battery by attaching the battery charger's negative clamp to the engine or chassis ground and not the negative battery terminal. Refer to Workshop Manual (WSM), Section 414-01.
SSM 524102024-04-24. Service bulletin. UNKNOWN OR OTHER. Various vehicles have had pinpoint tests, guided routines and the Warranty and Policy Manual recentlyupdated for diagnostics and repairs on SYNC generation 3 and later applications. When performingdiagnostics and repairs on SYNC Gen 3 or later, select the diagnostics tab and search for related symptoms,DTCs and keywords. The search results will be shown in the search results pane. Read and follow allTechnical Service Bulletins (TSB), Special Service Message (SSM)s or General Service Bulletin (GSB) first if abulletin specifically addresses the vehicle concern. If there are no messages, run the appropriate diagnosticpinpoint test found in the Workshop Manual (WSM). Follow the steps in the pinpoint test. Make sure to note thetitle of the guided routine, using the correct one for the vehicle's symptom or diagnostic trouble code (DTC) iscritical. Depending on the outcome of the pinpoint test, a repair validation code (RVC) may be generated eitherin the pinpoint test or Guided Routine. If the vehicle concern still exists after following the pinpoint tests orguided routine, then a manual RVC can be generated using the RVC Assist Form. A manual RVC can only begenerated once the above process has been followed.
OTASU6 P2Mach2024-04-04. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM. Quality improvements include: -Add soft button on SYNC screen for frunk electronic latch function.
TSB 24-21012024-04-04. Service bulletin. POWER TRAIN. This article supersedes TSB 24-2046 to update the Service Procedure LTIS statement. Some 2017-2020 F-150, 2018-2021 Expedition/Navigator/Mustang, 2019-2023 Ranger vehicles equipped with a 10R80 transmission may exhibit a harsh/delayed engagement and/or harsh/delayed shift, an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) that are stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to the transmission solenoid ID strategy, sticking valves in the main control valve body and/or axial movement of the CDF clutch cylinder (7H351) sleeve.
SSM 523352024-03-20. Service bulletin. ENGINE AND ENGINE COOLING. For 2015-2024 Ford and Lincoln vehicles equipped with turbocharged engines and customer concern of an engine oil leak, refer to Workshop Manual (WSM), Section 303-00 for oil leak inspection and testing methods. Ford has evaluated turbochargers replaced for oil leak symptoms and although oil may collect on the external surface of a turbocharger, it is extremely rare for a turbocharger assembly to be the root cause of the oil leak. Careful inspection of the turbocharger oil feed and drain tubes should be performed along with the recommended WSM procedures as needed. Warranty claims for turbocharger replacement going forward will be assessed.
SSM 523342024-03-20. Service bulletin. ENGINE AND ENGINE COOLING. Some 2011-2024 Mustang and F-150 vehicles equipped with a 5.0L engine may exhibit a tick tap and/or typewriter ticking noise at idle after an engine oil change. It is often referred to as typewriter noise because of its similarity to the sound of a mechanical typewriter. The noise in question may be heard on some engines when engine temperatures reach 150°F (65°C) or higher and engine speed is at idle up to approximately 1700 RPM. It can typically be heard at the front wheel well and is often isolated to the transmission bell housing or oil pan area. The typewriter noise tick rate can be faster or slower and is not detrimental to the engine function or durability and has no short or long term effects on the engine. This an operating characteristic of the 5.0L engine and no repairs should be attempted. This information along with an example audio clip has been added to the WSM Section 303-00 Engine System General Information > Diagnosis and Testing > Engine > PPT F > Step F2.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.