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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
TSB 21-21482021-09-04. Service bulletin. POWER TRAIN. Some 2020-2021 Mustang GT500 vehicles may exhibit a transmission fluid leak caused by improperly seated or cracked transmission cooler tubes attached to the transmission case. This may be due to the retaining bolts being cross threaded causing the seals to leak and/or crack the lines. If the threads in the transmission case that the cooler tube retaining bolts go into are damaged, it is not necessary to replace the transmission. These threads can be repaired. To correct the condition, follow the Service Procedure to repair these threads and replace the tubes.
SSM 500672021-09-04. Service bulletin. ELECTRICAL SYSTEM. Some 2015-2021 Ford and Lincoln vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTC) P0011, P0012, P0014, P0015, P0016, P0017, P0018, P0019, P0021, P0022, P0024 and/or P0025. This may be due to small debris causing the VCT solenoid to stick. Before attempting any component diagnosis or replacement of the VCT solenoid, refer to Powertrain Control and Emissions Diagnosis (PC/ED) pinpoint test HK12 to cycle the affected VCT solenoid 10 times to attempt to clear the debris. For claiming, use causal part 6M280 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.
SSM 500642021-09-04. Service bulletin. SERVICE BRAKES, ELECTRIC:SOFTWARE/PROGRAMMING. Some 2013-2021 Ford and Lincoln vehicles may exhibit noise when the brakes are applied. When diagnosing and repairing brake noise conditions, use the Workshop Manual (WSM) and the appropriate pinpoint test in section 206-00. The brake rotors should only be machined if directed by the WSM because one or more of the following conditions are present on the braking surface: scoring, excessive corrosion/rust or pitting, bluing/discoloration and/or heat spots. For additional information, refer to WSM section 206-00.
SSM 500492021-09-04. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:DOGS/SYNCHROS. Some 2017-2021 Ford and Lincoln vehicle customers may receive a message in their FordPass or Lincoln Way App stating Feature Unavailable. Since this is a fleet vehicle, it cannot access the SYNC Connect or FordPass Connect feature or Lincoln Connect or Embedded Modem Do not replace the TCU or perform any repair to resolve this condition. Refer the owner of the vehicle to Ford Pass Guides or Lincoln Way Concierge Teams to assist in removing the fleet telematics subscription.
SSM 500392021-09-04. Service bulletin. ELECTRICAL SYSTEM. Some 2016-2021 Ford or Lincoln vehicles equipped with SYNC 3 or SYNC 4 may exhibit a blank screen or other various SYNC symptoms only when the vehicle is in transport mode. This is considered normal due to the power saving features enabled while in transport mode. It is beneficial for battery life to keep the vehicle in transport mode until the vehicle is prepped for sale. To prevent a SYNC system lockup during transport mode deactivation, follow the Workshop Manual (WSM) procedure exactly allowing time for the SYNC system to complete its tasks such as fully booting up or powering down and shutting off before moving to the next step of the procedure. If the vehicle exhibits a blank screen or SYNC symptoms after transport mode deactivation, refer to WSM, Section 415-00 for normal diagnosis. The SYNC version can be confirmed via OASIS.
TSB 21-22632021-09-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Some 2019-2020 Edge/F-150/Fusion/Continental/MKZ/Nautilus, 2019-2021 Mustang/Ranger/Transit Connect, 2020-2021 EcoSport/Escape/Expedition/Explorer/F-Super Duty/Aviator/Corsair/Navigator and 2021 Bronco Sport vehicles with SYNC 3 may experience various SYNC performance related concerns. To correct the condition, follow the Service Procedure.
TSB 21-22362021-08-02. Service bulletin. SEATS. 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.
TSB 21-22202021-08-02. Service bulletin. EQUIPMENT. Some 2018-2021 Mustang coupe vehicles may exhibit a sagging headliner or gap where the headliner meets the upper door weatherstrip. This may be due to an outward bent door frame moulding not allowing the weatherstrip to overlap the headliner properly. To correct this condition, follow the Service Procedure to replace the door frame moulding.
SSM 498852021-07-02. Service bulletin. EQUIPMENT. Some 2019-2021 Ford and Lincoln vehicles may exhibit an intermittent audio echo/robotic voice heard during a bluetooth phone call by the person that is not in the vehicle. Using Apple CarPlay and Android Auto instead of Bluetooth can help alleviate the concern. Also turning on, then off, the privacy setting in the SYNC touchscreen can temporarily alleviate the concern. Engineering is currently investigating this concern and will be releasing a service fix in early July 2021. Let the customer know they can continue to drive the vehicle and schedule service appointments for customers once the repair becomes available. Monitor OASIS for updates.
TSB 21-21742021-07-01. Service bulletin. POWER TRAIN. Some 2021 Mustang vehicles equipped with a 5.0L engine and built on or before 11-Feb-2021 may exhibit an intermittent rough running drivability concern with an illuminated malfunction indicator lamp (MIL) and diagnostic trouble codes (DTC) P0351, P0352, P0353 and/or P0354 stored in the powertrain control module (PCM). This may be due to a software parameter within the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.
TSB 21-21552021-06-03. Service bulletin. STRUCTURE:BODY:HOOD; EQUIPMENT. Some 2020-2021 Mustang Shelby GT500 vehicles may exhibit a cracking on the hood inner panel. The crack is a cosmetic condition, not a structural concern. This may be due to a variation in production of the hood. To correct the condition, follow the Service Procedure to repair the hood crack.
TSB 21-21502021-06-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Some 2019-2020 Edge/F-150/Fusion/Continental/MKZ/Nautilus, 2019-2021 Mustang/Ranger/Transit Connect, 2020-2021 EcoSport/Escape/Expedition/Explorer/F-Super Duty/Aviator/Corsair/Navigator and 2021 Bronco Sport vehicles with SYNC 3 may experience various SYNC performance related concerns. To correct the condition, follow the Service Procedure.
SSM 498372021-06-01. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; STRUCTURE; EQUIPMENT. Some 2021 Mustang Mach 1 vehicles equipped with the handling package and built on or before 25-Mar-2021 may have been shipped to dealers without a front splitter. The front splitter is a loose shipped item that should be installed during the pre-delivery inspection (PDI) process. For more information, access the following dealership communication located on FMCDealer.com by copying and pasting the following link into a web browser https://www.fmcdealer.dealerconnection.com/content/fmcdealer/en/us/edc/2021/qafmm1p5321.html. The communication can also be found by navigating to the dealer communications page on FMCDealer.com. On the 'Dealer Communication' page, select 'May 2021' in the Month/Year category. Scroll down to 'May 3, 2021' and click on the link 'Q&A: 2021 Ford Mustang Mach 1 Part'.
SSM 498212021-06-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE AND ENGINE COOLING. Some 2015-2021 Ford and Lincoln vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTC) P0011, P0012, P0014, P0015, P0016, P0017, P0018, P0019, P0021, P0022, P0024 and/or P0025. This may be due to small debris causing the VCT solenoid to stick. Before attempting any component diagnosis or replacement of the VCT solenoid, refer to Powertrain Control and Emissions Diagnosis (PC/ED) pinpoint test HK11 to cycle the affected VCT solenoid 10 times to attempt to clear the debris. For claiming, use causal part 6M280 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.
SSM 498202021-06-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Some 2017-2021 Ford and Lincoln vehicle owners may experience a condition of missing Authorization, Command and Control, Battery Charging Details or Phone-as-a-Key setup buttons/selections in their FordPass or LincolnWay App. This condition is due to an error within the FordPass or LincolnWay App and not due to a concern on the vehicle. Verify that the customers FordPass or LincolnWay App is at the latest version. Replacement or reprogramming of the telematics control unit (TCU)/gateway module (GWM)/remote function actuator (RFA) will not resolve this condition. If the condition persists, Utilize the FordPass Guides or Lincoln Way Concierge teams.
SSM 497952021-06-01. Service bulletin. COMMUNICATION:MANUFACTURER TELEMATICS; ELECTRICAL SYSTEM. Some 2018-2021 Ford and Lincoln vehicles may not be able to perform remote commands via the FordPass/LincolnWay App due to an erroneous deep sleep message. If the vehicle has been driven within 14 days and the battery state of charge is above 9.5 volts when the deep sleep message set, this is an erroneous message. Starting and running the vehicle will clear the message and allow the remote commands to function again. Inform customers that engineering is currently working on a solution for this condition that will be released via an over the air (OTA) update that is expected in June 2021. Replacement or reprogramming of the telematics control unit (TCU)/gateway module (GWM) will not resolve this condition. Monitor OASIS for additional information and schedule service appointments for customers once the repair becomes available.
TSB 21-21082021-05-04. Service bulletin. POWER TRAIN. Some 2020-2021 Mustang GT500 vehicles may exhibit a transmission fluid leak caused by improperly seated transmission cooler tubes attached to the transmission case. If the threads in the transmission case that the cooler tube retaining bolts go into are damaged, it is not necessary to replace the transmission. These threads can be repaired. To correct the condition, follow the Service Procedure to repair these threads.
SSM 497612021-05-03. Service bulletin. ENGINE AND ENGINE COOLING. Some 2011-2021 Mustang and F-150 vehicles equipped with a 5.0L engine may exhibit a 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 150F (65Å’C) or higher and engine speed is at idle up to approximately 1700 RPMs. 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 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.
SSM 497562021-05-03. Service bulletin. BACK OVER PREVENTION:SOFTWARE. Some 2018-2021 vehicles supported by FDRS may not list a software update for a module under the SW Updates tab although an SSM or TSB is published for a software update. This may be due to the module already being at the latest software level. A later software level may have been programmed at the assembly plant, during a previous dealer visit or by an over the air (OTA) update for vehicles that have automatic updates enabled in the SYNC system settings. To review a vehicle's OTA update history, visit the Connected Vehicle > OTA Dashboard tab in OASIS. Information about the OTA Dashboard can be found on FMCDealer.com when performing a search on OTA History Job Aid.
SSM 496902021-03-31. Service bulletin. ELECTRICAL SYSTEM. For 2018-2021 EcoSport/Expedition/Navigator, 2019-2021 Ranger/Transit Connect, 2020-2021 Escape/Explorer/SuperDuty/Transit/Aviator/Corsair, 2021 Bronco Sport/F-150/Mustang/Mach-E the Workshop Manual (WSM) diagnostics may direct to replace a module on vehicles that use Ford Diagnosis and Repair System (FDRS). First, an FDRS session must be created on the vehicle prior to removing the faulted module. Once the session is started, run the Programmable Module Installation and replace the module only when instructed by FDRS. Installing a new module prior to starting a scan tool session may result in incomplete module configuration with DTCs U2100, U2101 and/or U2200. Once a session has been started, continue to follow normal WSM procedures to repair the vehicle.
SSM 495812021-03-03. Service bulletin. POWER TRAIN. Some 2020-2021 Mustang GT500 vehicles may exhibit various transmission related concerns and/or DTCs. In addition to following normal Workshop Manual (WSM) diagnostics, inspect C105, an inline connector next to the right side valve cover, for signs of pushed out terminals, terminal damage, or harness damage. If any pushed out terminals, terminal damage, or harness damage is found, repair as necessary.
SSM 495112021-02-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Some 2021 Mustang Mach-E vehicles may exhibit a condition of the high voltage battery coolant expansion tank reading over the max fill line. The max fill line may be disregarded, only the min line is relevant. Do not attempt to remove coolant from the high voltage battery coolant expansion tank if the coolant level is above the max fill line.
SSM 494932021-02-04. Service bulletin. EQUIPMENT. Some 2021 Mustang Mach-E vehicles may exhibit a concern where the vehicle cannot be charged or does not charge properly when using the mobile charger. The blue status indicator light on the charger control box may not illuminate, may turn on and off intermittently, or may illuminate amber. This may be due to the connector which runs between the household outlet and the charger control box not being fully seated into the charger control box. Ensure that this connector is fully inserted into the charger control box. When the connector is properly inserted, the flange on the connector will be flush with the casing of the charger control box. If the flange of the connector protrudes out from the charger control box, the connector is not fully seated into the charger control box.

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