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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 23-22502023-08-30. Service bulletin. POWER TRAIN. This article supersedes TSB 22-2428 and 23-2176 to update the Issue, Action and Service Procedure. Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 2021-2023 Bronco vehicles equipped with a 10R60/10R80/10R80MHT transmission may exhibit a harsh/delayed engagement and/or harsh/delayed shift, an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (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 powertrain control module (PCM) or transmission control module (TCM). This may be due to the software in the powertrain control module (PCM) or transmission control module (TCM), the transmission solenoid ID strategy, sticking valves in the main control valve body and/or axial movement of the CDF clutch cylinder (7H351) sleeve. To correct the condition, follow the Service Procedure to identify and correct the condition.
SAN-Vol1 I12023-08-16. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. The Service Awareness Newsletter is an informal communication that contains information that may not be presently available in a TSB, SSM, GSB, or other electronic communication. This article includes information on warranty, technical service tips and other service information.
SSM 518302023-08-14. Service bulletin. EQUIPMENT. Some 2021-2023 Bronco vehicles equipped with a soft top roof may exhibit rear quarter window(s) that do not stay attached to the rear window after driving the vehicle or using the soft top quick access cargo function to raise the rear of the soft top assembly for luggage compartment access. This may be due to a retention channel on the rear window that is too narrow. To correct this condition, replace the rear window assembly (service base part # 7842006). Refer to Section 501-18A > Removal and Installation > Soft Top Assembly.
OTASYNCLCReDBron2023-08-04. Service bulletin. BACK OVER PREVENTION:SOFTWARE. LC SYNC (8in screen) updates are being redeployed for 2021-2022 Broncos. Quality improvements include: - Management of memory space to allow future updates.
TSB 23-22412023-08-02. Service bulletin. EQUIPMENT; STRUCTURE. Some 2021-2023 Bronco vehicles equipped with a factory subwoofer and built on or before 20-Mar-2023 may exhibit a rattle from right loadspace trim panel at high audio system volumes. This may be due to poor retention from the right loadspace trim panel tree fasteners. To correct this condition, follow the Service Procedure to replace the tree fasteners on the right loadspace trim panel.
TSB 23-22382023-08-02. Service bulletin. ELECTRICAL SYSTEM. Some 2021-2022 Bronco vehicles may exhibit a charging system fault message displayed in the instrument panel cluster (IPC), various diagnostic trouble codes (DTCs) related to charging system, and/or a charging system that has stopped functioning after water fording in muddy water. This may be the result of mud accumulation inside the generator causing it to fail. To resolve the concern, follow the Service Procedure to replace the generator and install a revised generator shield onto the vehicle.
TSB 23-22292023-07-21. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY; EQUIPMENT. Some 2021-2022 Bronco vehicles equipped with a soft top may exhibit exterior wear on the sides of the soft top material above the B-pillar. This may be due to contact and rubbing between the soft top frame and soft top material. To correct the condition, follow the Service Procedure to replace both right and left deflectors attached to the soft top frame and soft top material.
TSB 23-22132023-07-12. Service bulletin. STRUCTURE. Some 2021-2023 Bronco vehicles built on or before 31-May-2023 may exhibit a whistle noise below the lower left windshield area at the bottom of the A-pillar. This may be due to a missed body sealer application at the factory. To correct this condition, follow the Service Procedure to reseal the affected body seam.
23OTASU4P2BRONCO2023-07-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Software Update 4 P2 for 2021-2023 Bronco vehicles is now available. Quality improvements include: - Minimize time customer cannot enter the vehicle during future inhibit updates.
SSM 517622023-07-03. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Some 2021-2023 Ford and Lincoln vehicles equipped with SYNC 4 may exhibit the navigation feature in the center display screen only displaying imperial units and not being able to change to metric. This may be due to the software level of the SYNC module (APIM). This issue does not affect vehicle durability and no additional diagnosis or service is required for this condition at this time. Inform customers that engineering is currently working on a solution for this condition and will be released via Ford Power-Up software updates delivered over-the-air (OTA) expected in September 2023. Software will update automatically if vehicle connectivity is enabled in the vehicles settings. Schedule a service visit for customers who have disabled vehicle connectivity or who report that they did not receive the update in September 2023. Monitor OASIS for additional information.
TSB 23-22002023-06-30. Service bulletin. LATCHES/LOCKS/LINKAGES; EQUIPMENT; VISIBILITY:SUN/MOON ROOF ASSEMBLY. Some 2021-2023 Bronco vehicles equipped with a soft top roof may exhibit rear quarter window(s) that do not stay attached to the rear window after driving the vehicle or using the soft top quick access cargo function to raise the rear of the soft top assembly for luggage compartment access. This may be due to a retention channel(s) on the rear window that is too narrow. Do not replace the rear quarter windows. To correct this condition, follow the Service Procedure to secure the rear quarter window(s) in place until a new rear window can be obtained to permanently correct this condition.
TSB 23-21962023-06-29. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This article supersedes TSB 23-2135 to update the Part List. Some 2021-2022 Bronco vehicles equipped with a 2.7L or 3.0L EcoBoost engine may exhibit various charging system error messages and/or illuminated charging system indicator displayed in the instrument panel cluster (IPC) with diagnostics trouble code (DTC) B11DB set within the body control module (BCM). This may be due to coolant contamination into the battery monitor sensor (BMS) from a leaking transmission fluid heater coolant control valve. To correct the condition, follow the Service Procedure to clean the BMS connector and replace the transmission fluid heater coolant control valve.
TSB 23-21822023-06-28. Service bulletin. ELECTRICAL SYSTEM. Some 2021-2022 Bronco vehicles may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTCs) stored in the all-wheel drive (AWD) module. The setting of these DTCs result in an inoperative 4WD system that may be intermittent. These DTCs may be setting due to a low battery state of charge. To correct the condition, follow the Service Procedure to verify the battery condition and reprogram the AWD module.
SSM 517262023-06-28. Service bulletin. EQUIPMENT; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Some 2021-2023 Bronco vehicles may exhibit the HVAC switching out of recirculation without input. This may be due to the air flow mode door inlet strategy while in recirculation mode. This strategy periodically purges the cabin air every 30-60 minutes depending on conditions the vehicle is operated in. If monitoring the Air Inlet Door PID with FDRS, it can go to approximately 50 % movement of the Air Inlet Door while in recirculation mode. During this climate control system strategy operation the recirculation button light should not go off. This is normal operation of the climate control system and no repairs should be attempted. If the recirculation button/light goes off then reference Workshop Manual (WSM), Section 412-00.
SSM 516942023-06-16. Service bulletin. VISIBILITY; VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. Some 2021-2023 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 condition is currently under investigation and repairs and/or component replacement is not expected to reduce the rattle. Inform customers that they can continue to drive the vehicle and that engineering is currently developing a solution which will be available in Q4 2023. Monitor OASIS and schedule a follow up appointment with the customer when the fix becomes available.
SSM 516872023-06-16. Service bulletin. UNKNOWN OR OTHER; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN. TSB 22-2428 is missing some labor operations. For any missing labor operations, claim available new model labor operations or m-time. Refer to this article on the repair order. When replacing the CDF cylinder, the current TSB does not require a complete transmission overhaul or cooler and converter flushing. Ford is currently reviewing the TSB. Monitor OASIS for updates.
TSB 23-21622023-06-16. Service bulletin. PARKING BRAKE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:STEERING; PARKING BRAKE:ELECTRICAL:SWITCH. Some 2021-2022 Bronco vehicles built on or before 18-Sept-2022 may exhibit a broken parking brake switch. The original parking brake switch design is no longer available. For vehicles within this build date that require parking brake switch replacement, follow the Service Procedure to install a steering column opening cover which will come with a new and improved parking brake switch design.
TSB 23-20192023-06-13. Service bulletin. POWER TRAIN; POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:GEARS. Some 2021-2023 Bronco vehicles equipped with a MT88 manual transmission may experience a rotational scraping noise while the transmission is in neutral, 1st or 2nd gear with the clutch pedal released and may be more noticeable in ambient temps below 10°C (50°F) and after a cold soak. This noise may diminish as the transmission warms up. This may be due to the 5th and 6th gear synchronizer rings. To correct the condition, follow the Service Procedure to replace the 5th and 6th gear synchronizer rings.
SSM 516772023-06-08. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM:SOFTWARE. Some 2021-2023 Bronco vehicles may exhibit an inaccurate AAT reading with DTC P0072 stored in the powertrain control module (PCM). The Workshop Manual (WSM), Section 413-01 > pinpoint test (PPT) BC has been updated to address this concern. The AAT WSM updates include: improved diagnosis and testing, AAT sensor reset, and the AAT sensor interaction with climate control system and gateway module A (GWM).
SSM 516732023-06-08. Service bulletin. BACK OVER PREVENTION:SOFTWARE. Some 2021-2023 Bronco vehicles may exhibit a warning message displayed in the instrument panel cluster (IPC) that there is a trailer connected to the vehicle when no trailer is connected. The Workshop Manual (WSM), Section 417-01 > Trailer Lamps, has been updated with Pinpoint Test (PPT) J - Message Center Displays An Incorrect Trailer Message.
TSB 23-21632023-05-31. Service bulletin. EQUIPMENT; STRUCTURE. Some 2021-2022 Bronco vehicles built on or before 25-Jul-2022 may exhibit a rattle noise from the tailgate when driving on rough roads. The rattle may diminish with the spare tire removed. This may be due to the design of the tailgate and tailgate hinges. To correct this condition, follow the Service Procedure to replace the tailgate and the upper and lower tailgate hinges.
TSB 22-24282023-05-30. Service bulletin. POWER TRAIN. Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 2021-2023 Bronco vehicles equipped with a 10R60 transmission and built on or before 23-Dec-2022 or with a 18R80/10R80MHT transmission and built on or before 15-Aug-2022 may exhibit a harsh/delayed engagement and/or harsh/delayed shift. It is possible the vehicle may also have an illuminated malfunction indicator lamp (MIL) or diagnostic trouble codes (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 powertrain control module (PCM) or transmission control module (TCM). This may be due to the software in the PCM or TCM, 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 516652023-05-29. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021-2023 Ford and Lincoln vehicles equipped with a 2.7L or 3.0L engine may exhibit an upper engine thump/knock noise coming from the left cylinder head. This condition is most noticeable at idle and may lessen at higher engine speed or while driving. This condition does not affect vehicle durability and will not get worse over time. Use a stethoscope or chassis ears and listen just behind the left cylinder head intake VCT solenoid on the cam cover to determine if the thump/knock noise is coming from the cylinder head/camshaft. The left cylinder head and the camshaft roller followers are available as service parts.
TSB 23-21352023-05-24. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM. Some 2021-2022 Bronco vehicles equipped with a 2.7L or 3.0L EcoBoost engine may exhibit various charging system error messages and/or illuminated charging system indicator displayed in the instrument panel cluster (IPC) with diagnostics trouble code (DTC) B11DB set within the body control module (BCM). This may be due to coolant contamination into the battery monitor sensor (BMS) from a leaking transmission fluid heater coolant control valve. To correct the condition, follow the Service Procedure to clean the BMS connector and replace the transmission fluid heater coolant control valve.
TSB 23-21542023-05-23. Service bulletin. BACK OVER PREVENTION:SOFTWARE; POWER TRAIN. 2021-2022 F-150 vehicles with 2.7L, 3.3L, 3.5L EcoBoost or 5.0L engines, 2020-2022 Transit vehicles with 3.5L Duratec/3.5L EcoBoost engines, 2021-2023 Bronco with the 2.3L or 2.7L engine having charging system diagnostics performed in the Workshop Manual (WSM) may experience the generator voltage desired (GENVDSD) parameter identification (PID) missing from the powertrain control module (PCM) PID list in the Ford Diagnosis And Repair System (FDRS) scan tool. This may be due to a software parameter in the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.

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