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Service bulletins for the 2021 Ford Bronco

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.

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

By type

By component

By trouble code

Bulletins, newest first
TSB 25-24332025-09-23. Service bulletin. STRUCTURE:BODY. S+A42:H67me of the vehicles listed in the Model statement above may exhibit the hard top center panel's quarter turn latches come loose while driving.
24N12 -S12025-09-02. Other. UNKNOWN OR OTHER; ENGINE. NEW VEHICLE DEMONSTRATION / DELIVERY HOLD Safety Recall 24S55 – Supplement #1 Dated: August 15, 2025 Customer Satisfaction Program 24N12 Dated June 19, 2025 New! REASON FOR THIS SUPPLEMENT • Rental Vehicles: Added specification that long block replacement must be approved by SSSC for rental coverage to apply. • Labor Allowances: Added labor operation for photo submission on all vehicles and labor operation for borescope inspection. • SSSC Approval: Borescope photo submission required for long block approval. • Parts Handling Allowance: Added additional allowance claiming information for engine replacement. • Attachments: Technical Instructions have been added to the program. PROGRAM TERMS This program provides a no-cost, one-time repair (if needed) for an engine long block replacement for vehicles that completed the 24S55 inspection process. This program will be in effect for 10 years of service or 150,000 miles from the warranty start date of the vehicle, whichever occurs first. This is
TSB 25-23252025-08-19. Service bulletin. UNKNOWN OR OTHER. Some of the vehicles listed in the Model statement above may exhibit an air register that is broken or loose. This may be due to the register barrel detaching from the register assembly. Removal of the instrument panel is no longer required.
22-PU1010-MIL-LT Bronco2025-08-04. Over-the-air update. ELECTRICAL SYSTEM. Software Update: Quality improvements include: -Addresses incorrectly triggered warning lights when doors are removed -Addresses an erroneous DTC caused by the Electronic Brake Booster (EBB) in cold climate
SSM 540902025-08-04. Service bulletin. ELECTRICAL SYSTEM. Some 2021-2025 Ford and Lincoln vehicles equipped with SYNC4/Digital Experience may exhibit an unsuccessful telematics control unit module (TCU) software update or software activation during a universal serial bus (USB) update. This may be due to the vehicle connectivity setting being disabled.
SSM 540162025-07-08. Service bulletin. ENGINE. Some 2021-2025 Bronco and 2024-2025 Ranger vehicles equipped with a 2.7L/3.0L EcoBoost engine may require removal of the engine front cover due to various concerns. Workshop Manual, Section 303-01 has been updated with improved engine front cover removal and installation service procedure steps including a new body removal and install step.
24N122025-07-02. Other. ENGINE. Certain 2021 - 2022 Model Year Various Vehicles Engine Valve Inspection Test
SSM 539812025-07-02. Service bulletin. VISIBILITY/WIPER; STRUCTURE:BODY. Some 2021-2024 Bronco vehicles may exhibit a rattle from the front windows with the windows placed in the partially down position and driving over rough roads and/or bumps. This may be due to the interface between the window glass and the body mounted glass run. To correct this condition, replace the body mounted glass runs using the body mounted glass run kit (3 door: M2DZ-9821597-E, and 5 door: M2DZ-7821597-F) which contains updated seals for improved sealing performance. For claiming, use causal part 9821597/7821597 and labor operations 23943A and 23943A19 in Section 12 of the Service Labor Time Standards (SLTS) Manual.
SSM 539732025-07-02. Service bulletin. POWER TRAIN; ENGINE. 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 compressor to change out the A/C Compressor clutch assembly.
SSM 539662025-06-24. Service bulletin. ELECTRICAL SYSTEM; UNKNOWN OR OTHER. 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.
SSM 539622025-06-24. Service bulletin. STRUCTURE:BODY; VISIBILITY/WIPER. Some 2021-2025 Bronco vehicles may exhibit a water leak from the A-pillar, overhead console/upfitter switches and/or sun visors. If a leak is identified from this area, refer to Workshop Manual (WSM), Section 501-18 Pinpoint Test (PPT) G for water leak diagnosis. If the PPT leads to the replacement of the header seal, a revised header seal has been released for service (M2DZ-7803110-H) which contains a thicker consistent bead of butyl across the entire length of the seal. The header seal will need to be firmly depressed and massaged to make sure all of the butyl that is across the entire header seal will properly adhere to the body, creating a water-tight seal. For claiming, use causal part 7803110 and labor operation 03110A in Section 12 of the Service Labor Time Standards (SLTS) Manual.
SSM 538762025-06-11. Service bulletin. POWER TRAIN. Some 2020-2023 Aviator/Explorer and 2021-2023 Bronco vehicles equipped with a 10R60 transmission may exhibit harsh or delayed engagement/shift concerns. Refer to Workshop Manual (WSM), Section 307-01 > Diagnosis and Testing for normal diagnostics. The WSM has been updated with information from previously published articles related to this concern.
SSM 538692025-06-11. Service bulletin. SUSPENSION; WHEELS. Some 2021-2024 Bronco vehicles built on or before 01-Jan-2025 equipped with a 2.3L EcoBoost engine and 10R60 automatic transmission may exhibit diagnostic trouble codes (DTCs) P0300, P0301, P0302, P0303, and P0304 and may be accompanied by a buck/jerk sensation while driving between 35-55 mph (56-89 km/h) in gears 7-10. If the condition remains after normal engine misfire diagnostics and associated repairs have been performed, the condition may be related to driveline torsional vibration induced by the rear wheels and/or rear axle assembly. The driveline torsional harmonics/vibrations are incorrectly identified by the misfire monitor as an engine misfire. Perform standard road force wheel balancing of all four tire and wheel assemblies and retest. If the condition continues to occur, replace the ring and pinion gearset in the rear axle. For claiming, use causal part 4209 and applicable labor operations found in Section 04 of the Service Labor Time Standards (SLTS) Manual.
SSM 538142025-05-27. Service bulletin. VISIBILITY/WIPER. Some 2021-2024 Bronco vehicles may exhibit a water leak from the a-pillar, overhead console/upfitter switches and/or sun visors
TSB 25-22122025-05-21. Service bulletin. VISIBILITY/WIPER; ELECTRICAL SYSTEM. Some of the vehicles listed in the Model statement above may exhibit a repeat loss of window initialization which results in a loss of short drop and/or one-touch up and one-touch down feature operation. This may be due to a recent short drop enhancement that is contained in the driver door module (DDM) and passenger door module (PDM) software.
SSM 537642025-05-21. Service bulletin. POWER TRAIN; ENGINE. Some 2020 Continental, 2020-2024 Edge/Nautilus, 2020-2025 Explorer/Aviator/Escape/Corsair/F-150/F-Super Duty/Ranger/Transit/E-Series, 2021-2025 Bronco, and 2022-2025 Maverick vehicles may require an engine cooling system flush to be performed for various concerns. Workshop Manual (WSM), Section 303-03 has been updated to eliminate the need to remove and install the radiator assembly to perform a radiator flush.
SSM 536742025-04-30. Service bulletin. UNKNOWN OR OTHER. Some 2021-2024 Bronco vehicles may exhibit paint wearing along on the top inner edge of the tailgate where the rear window weather strip contacts the tailgate. This may be due to the accumulation of dirt between the rear window seal and tailgate. Inform customers that engineering is aware of this condition and is currently working on a solution which is expected in Q3 2025. Schedule a service visit for customers when the repair is available in Q3 2025. Monitor OASIS for additional information.
TSB 25-21532025-04-23. Service bulletin. UNKNOWN OR OTHER. This article supersedes TSB 25-2077 to update the model years affected. Some of the vehicles listed in the Model statement above may a exhibit a factory soft top headliner that is detaching from the soft top material. This may be due to the factory installation process.
SSM 536342025-04-16. Service bulletin. UNKNOWN OR OTHER. Drivers of some 2020-2025 Escape, 2021-2025 Bronco Sport and 2022-2025 Maverick vehicles may report the uncommanded locking of the driver door after the door is closed. This may be due to the driver placing their hand on the interior front door handle and inadvertently pushing the manual door lock toggle into the lock position. If the lock and latching mechanisms are functioning normally, and if there are no related diagnostic trouble codes (DTCs) or other issues identified, then the system is operating as designed.
OTASYNC-24.2.1.6.1Bronco2025-04-03. Over-the-air update. UNKNOWN OR OTHER. Quality improvements include: -Addresses Accessory Protocol Interface Module reboot at start up
TSB 25-21072025-03-31. Service bulletin. UNKNOWN OR OTHER. This article supersedes TSB 25-2055 to update the labor time description.
TSB 25-20772025-03-18. Service bulletin. UNKNOWN OR OTHER. is article supersedes TSB 24-2265 to update the labor times associated with the Service Procedure from M-time only to fixed time and M-Time with a limit.
TSB 25-20552025-03-04. Service bulletin. UNKNOWN OR OTHER. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * General system performance/stability/intermittent system reboot * Intermittent wireless CarPlay or Android Auto function * Phone related concerns with intermittent no audio or static * Navigation/global positioning system (GPS) related concerns through CarPlay and Android Auto * Alexa function consistency and stability * Charge Assist/Public Charging app inoperative (e-Transit only) This may be due to a concern with the software in the accessory protocol interface module (APIM).
OTA ECG-24.2.5.6.3 Bronco2025-02-05. Over-the-air update. UNKNOWN OR OTHER. "Quality improvements include: -Improve battery state of charge drainage issue due to Electronic Control Unit key off load events. -SYNC screen will display correct software update status. -Software update task will be automatically terminated after trigger expiration date"
SSM 533052025-01-27. Service bulletin. UNKNOWN OR OTHER. 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.

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