2021 Ford Mustang Technical Service Bulletins

148 technical service bulletins (TSBs) are on record for the 2021 Ford Mustang. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11035465Jul 9, 2026Electrical system, Other or unknown. NEW VEHICLE DELIVERY HOLD - Emissions Recall 26E04 Certain 2021-2025 Model Year F-150, Maverick, Mustang, Ranger, Expedition, Bronco Sport, Explorer, Bronco, Navigator, and Aviator Vehicles Powertrain Control Module Software Update
• 11032697May 8, 2026Transmission and drivetrain. This bulletin supersedes 26-2046. Reason For Update: update the parts list to change the claim quantity of the C clutch friction plates (HL3Z-7B164-A), C clutch steel plates (HL3Z-7B442-F), D clutch steel plates (HL3Z-7B442-D), add the rear driveshaft flange CV joint-to-pinion flange cup bolts and retaining straps (LK4Z-4B496-B) for Transit, and update the parts description for the transfer case fluids applicable…
• 11031263Apr 2, 2026Electrical system, Lane departure. Various 2020-2026 Ford and Lincoln vehicles equipped with blind spot information system (BLIS) may experience an inoperative blind spot monitoring with a "Blind Spot System Fault" message displayed in the instrument panel cluster (IPC). This may also be accompanied by diagnostic trouble codes (DTCs) B118C:11 and/or B118C:15 stored in the driver door module (DDM), and/or B118D:11 and/or B118D:15 stored in the…
• 11031262Apr 2, 2026Transmission and drivetrain. For 20212026 vehicles equipped with the 10R80 transmission, a new Transmission Clutch Circuit Leak Test has been introduced in the Ford Diagnosis and Repair System (FDRS). This test utilizes the pressure and vacuum transducer (PVT) when available.
• 11030282Mar 25, 2026Other or unknown, Back-over prevention (rear camera), Lane departure. Advance Notice – Customer Satisfaction Program 25N17 Certain 2015-2025 Model Year Multiple Vehicle Lines Rear View Camera Replacement If Required After Dealer Evaluation
• 11030791Mar 19, 2026Transmission and drivetrain. For 2021-2026 vehicles equipped with the 10R80 transmission, a new Transmission Clutch Circuit Leak Test has been introduced in the Ford Diagnosis and Repair System (FDRS). This test utilizes the pressure and vacuum transducer (PVT) when available. The Workshop Manual (WSM) has been updated under Section 307-01 > Diagnosis and Testing to include this procedure. The new test improves the accuracy of detecting…
• 11029052Feb 24, 2026Other or unknown, Electrical system, Body and structure. Ford and Lincoln vehicles equipped with wired keyless entry keypad systems and accessory wireless keyless entry keypad systems may or may not come with a wallet card containing the master code. Unlike the integrated wired keypad, the accessory wireless keypad master code cannot be retrieved from the vehicle using a diagnostic scan tool or from the label printed on the body control module (BCM).
• 11029595Feb 17, 2026Electrical system. Some 2019-2024 Ford and Lincoln vehicles equipped with SYNC3 may experience various connectivity concerns with The Ford App Lincoln App including but not limited to: missing activation prompt pop-upon the vehicle's center display screen when attempting to activate vehicle through The Ford App Lincoln App, incorrect location global positioning system GPS reported through The Ford App Lincoln App, problems with…
• 11028832Feb 13, 2026Transmission and drivetrain. This bulletin supersedes TSB 25-2611. Reason For Update: Change the part number for the transmission fluid heat exchanger bolt (Expedition/Navigator) as well as change the claim/package quantities for HL3Z-7B442-F and HL3Z-7B164-C.
• 11027124Dec 18, 2025Transmission and drivetrain. This bulletin supersedes TSB 25-2474 for 3 Part List corrections. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * Harsh engagement * Delayed engagement * Harsh shift * Delayed shift * Illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701…
• 11026928Dec 2, 2025Other or unknown. Special Field Action 25L02 Certain 2017-2024 Model Year California Emissions-Certified Vehicles Transmission Control Assembly Reimbursement
• 11025611Nov 12, 2025Transmission and drivetrain, Electrical system. Some 2015-2021 Ford and Lincoln vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P0011, P0012, P0014, P0015, P0016, P0017, P0018, P0019, P0021, P0022, P0024 and/or P0025. Pinpoint test HK in the Powertrain Control and Emissions Diagnosis (PC/ED) or in Section 303-14 of the Workshop Manual (WSM) has been updated to address this concern.
• 11024872Oct 30, 2025Transmission and drivetrain. This bulletin supersedes TSB 25-2429 for a labor operation correction. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * Harsh engagement * Delayed engagement * Harsh shift * Delayed shift * Illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701…
• 11024526Oct 21, 2025Electrical system, Lane departure. Some 2020-2025 various Ford and Lincoln vehicles equipped with blind spot information system (BLIS) may experience an inoperative blind spot monitoring with a "Blind Spot System Fault" message displayed in the instrument panel cluster (IPC). This may also be accompanied by diagnostic trouble codes (DTCs) B118C:11 and/or B118C:15 stored in the driver door module (DDM), and/or B118D:11 and/or B118D:15 stored in the…
• 11024519Oct 21, 2025Other or unknown. This article supersedes TSB 23-2334 to update the model years affected and part list. Some of the vehicles listed in the Model statement above may exhibit a sagging headliner or a gap where the headliner meets the upper door weatherstrip.
• 11023198Sep 13, 2025Transmission and drivetrain. This bulletin supersedes TSB 25-2300 to update the production fix date. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * Harsh engagement * Delayed engagement * Harsh shift * Delayed shift * Illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700…
• 11021971Aug 16, 2025Transmission and drivetrain, Electrical system. This bulletin supersedes TSB 25-2131 to add reprogram for later level software, new Steps 1-4 in Service Procedure. Updated Part List with 3 superseded part numbers.
• 11021803Aug 7, 2025Electrical system, Other or unknown. Various 2019-2024 Ford and Lincoln vehicles equipped with SYNC 3 may experience a partially or fully black center display screen at start-up using Apple CarPlay or Android Auto. This does not affect rear camera operation. This may be due to interference from the phone being connected into the media hub using a universal serial bus (USB) cable during SYNC system boot up. To correct his condition, advise the customer…
• 11020957Jul 23, 2025Visibility (wipers, defrost, mirrors), Other or unknown. For 2018-2024 Edge and 2018-2025 Mustang vehicles, if diagnostics lead to the sun visor as the causal part, a new lower level part is available (DS7Z-9904132-A). It is not necessary to replace the sun visor assembly if only the clip is damaged.
• 11020044Jun 25, 2025Engine, Transmission and drivetrain. Some 2021-2024 Edge/Nautilus, 2021-2025 Bronco/Bronco Sport/E-Series/Escape/Corsair/Expedition/Navigator/Explorer/Aviator/F-150/F-Super Duty/Mustang/Ranger, and 2022-2025 Maverick vehicles may require an A/C compressor clutch assembly replacement be performed for various concerns. Workshop Manual (WSM), Section 412-00 Removal and Installation has been updated to eliminate the need to remove and install the A/C…
• 11019259May 10, 2025Other or unknown. Certain 2018-2024 model year various vehicles — update sync software
• 11017121Apr 17, 2025Other or unknown. This bulletin supersedes TSB 24-2436. Reason for update: update the Part List and Service Procedure Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * Harsh engagement * Delayed engagement * Harsh shift * Delayed shift * Illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0751, P0752, P0756, P0757, P0761, P0762, P0766…
• 11017057Apr 11, 2025Other or unknown. This article supersedes 23-2132 to update the labor times from M-time to M-Time with a limit. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * "Exhaust Mode Selection Not Available" messages * Illuminated malfunction indicator lamp (MIL) with diagnostics trouble codes (DTCs) P26C5, P26C6, P26FE, P2BF9, P2BFB, P26C7, P2BF5, P2BF8, P2BFD and/or P2BFA…
• 11013132Jan 17, 2025Other or unknown. Some 2017-2025 Ford and Lincoln vehicles equipped with a 10R60/10R80/10R80 MHT/10R100 transmission may exhibit a whine noise at idle and/or while driving.
• 11012856Jan 10, 2025Other or unknown. "Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: • Harsh engagement • Delayed engagement • Harsh shift • Delayed shift"
• 11012217Dec 4, 2024Other or unknown. Certain 2018 - 2024 Model Year Various Vehicles Update SYNC Software
• 11009440Oct 23, 2024Other or unknown. 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.
• 11008948Oct 10, 2024Other or unknown. 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.
• 11008391Sep 26, 2024Other or unknown. Various Vehicles Equipped With A 10R80 Automatic Transmission - Harsh/Delayed Engagement And/Or Harsh/Delayed Shift - Built On Or Before 15-Aug-2022
• 11006772Aug 26, 2024Transmission and drivetrain. 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…
• 11006862Aug 23, 2024Other or unknown. 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.
• 11007073Aug 22, 2024Other or unknown. 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.
• 11006036Jul 23, 2024Other or unknown. 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…
• 11005746Jul 16, 2024Other or unknown. 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…
• 11005710Jul 9, 2024Other or unknown. 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.
• 11003146Jun 28, 2024Other or unknown. 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
• 11001646Jun 6, 2024Other or unknown. 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…
• 11001364Jun 4, 2024Transmission and drivetrain. 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…
• 11000297May 18, 2024Transmission and drivetrain. 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.
• 11000294May 16, 2024Engine. 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…
• 11000181May 2, 2024Engine. 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…
• 10254138Apr 24, 2024Equipment. 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…
• 10253687Apr 15, 2024Transmission and drivetrain. 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.
• 10253683Apr 9, 2024Transmission and drivetrain. 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.
• 10253559Apr 9, 2024Other or unknown. 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…
• 10253552Apr 3, 2024Other or unknown. 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.
• 10252674Mar 29, 2024Transmission and drivetrain. 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…
• 10252713Mar 27, 2024Other or unknown, Electrical system. Quality improvements include: -Add soft button on SYNC screen for frunk electronic latch function.
• 10251952Mar 6, 2024Engine 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…
• 10251951Mar 6, 2024Engine 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…

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