2021 Ford Bronco Technical Service Bulletins

324 technical service bulletins (TSBs) are on record for the 2021 Ford Bronco. 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.

• 10241548Aug 8, 2023Visibility (wipers, defrost, mirrors). Some 2021-2022 Bronco vehicles equipped with a soft top roof may exhibit loose exterior fabric on the rear window assembly. This may be due to broken D-pillar clips on the rear window. To correct the condition, replace the rear window. Refer to the Workshop Manual (WSM), Section 501-18A > Removal and Installation > Soft Top Assembly.
• 10241993Aug 3, 2023Back-over prevention (rear camera). Software Update 4 P3 for 2021-2023 Bronco Vehicles is now available. Quality improvements include: -Various Apple Carplay quality improvements
• 10241627Aug 2, 2023Electrical system. In various 2017-2023 Ford and Lincoln vehicles, customers may receive a message in the FordPass or LincolnWay App stating Feature Unavailable. Since this is a fleet vehicle, it cannot access the (SYNC Connect) FordPass or LincolnWay app through the TCU Embedded Modem. If this message appears, the vehicle may be equipped with a fleet telematics module. Replacement of the TCU or TCU related repairs will not prevent…
• 10240720Aug 2, 2023Equipment. 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…
• 10240251Jul 28, 2023Equipment, Body and 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.
• 10240242Jul 25, 2023Electrical 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…
• 10239476Jul 14, 2023Equipment, Visibility (wipers, defrost, mirrors). 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.
• 10239096Jul 7, 2023Body and 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.
• 10240463Jul 5, 2023Back-over prevention (rear camera). LC SYNC (8in screen) updates are being redeployed for 2021-2022 Broncos. Quality improvements include: - Management of memory space to allow future updates.
• 10238461Jul 3, 2023Electrical system, Equipment. 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.
• 10238284Jun 26, 2023Electrical 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…
• 10238292Jun 22, 2023Equipment, Visibility (wipers, defrost, mirrors), Latches, locks and linkages. 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.
• 10238290Jun 20, 2023Engine cooling, Electrical system. 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).
• 10237978Jun 16, 2023Equipment, Visibility (wipers, defrost, mirrors). 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…
• 10237792Jun 9, 2023Visibility (wipers, defrost, mirrors). 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…
• 10237783Jun 9, 2023Transmission and drivetrain. 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.
• 10240743Jun 8, 2023Equipment. 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.
• 10238730Jun 7, 2023Electrical system. 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.
• 10237786Jun 7, 2023Transmission and drivetrain, Equipment, Other or unknown. 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.
• 10237784Jun 6, 2023Brakes, Equipment. 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.
• 10237589Jun 2, 2023Transmission and drivetrain, Electrical system. 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).
• 10237580Jun 1, 2023Back-over prevention (rear camera). 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.
• 10236680May 29, 2023Transmission and drivetrain. 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.
• 10236688May 26, 2023Engine 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.
• 10236686May 24, 2023Equipment, Body and 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.
• 10236575May 16, 2023Transmission and drivetrain, Back-over prevention (rear camera). 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…
• 10236034May 4, 2023Electrical system, Engine cooling. 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…
• 10234129Apr 7, 2023Visibility (wipers, defrost, mirrors), Body and structure. Some 2021-2022 Bronco vehicles may exhibit paint damage on the rear quarter panel due to contact with the rear window assembly (D-pillar). This may be due to an oversized washer being used during production. To correct the condition, repair the paint damage to the rear quarter panel and replace the rear window assembly.
• 10234137Apr 6, 2023Engine cooling, Transmission and drivetrain. Some 2020-2023 F-150 and 2021-2023 Bronco vehicles equipped with a 2.7L or 3.0L EcoBoost engine may exhibit a ticking/tapping or rattle type noise from the top front cover area of the engine on initial start-up after a cold soak of 6 hours or more that may last for 2-5 seconds. This may be due to a stuck internal component of the variable cam timing (VCT) unit. To correct the condition, replace all 4 of the VCT…
• 10235153Apr 4, 2023Body and structure. For 2000-2024 Ford and Lincoln vehicles, swapping a module from a vehicle for diagnosis purposes is likely to cause errors and is not recommended. It is also not recommended to order a replacement module using a vehicle identification number (VIN) from a different vehicle. Most modules on these affected vehicles are VIN/vehicle specific and hardware variations between modules do exist.
• 10234130Apr 3, 2023Visibility (wipers, defrost, mirrors). Some 2021-2023 Bronco vehicles may exhibit a diagnostic trouble code (DTC) B15F1:15 code stored in memory of the passenger door module (PDM). This code was intended for a right mirror indicator light emitting diode (LED) feature on vehicles and currently is not used. This code may be due to PDM module software. If the PDM module exhibits DTC B15F1:15, the DTC should be ignored.
• 10234125Apr 3, 2023Transmission and drivetrain. Some 2020-2023 Explorer/Aviator/Transit, 2021-2023 F-150/Bronco, 2022-2023 Expedition/Navigator/Mustang and 2023 F-250/F-350 Super Duty vehicles may exhibit harsh/delayed engagement and/or harsh/delayed shift concerns. These may be addressed with the powertrain control module (PCM)/transmission control module (TCM) Transmission Accelerated Main Control Break In Routine and/or a main control overhaul.
• 10233599Mar 30, 2023Back-over prevention (rear camera). Some 2021-2022 Bronco vehicles may experience at least one of the following symptoms: blank/frozen center display screen, Android Auto Apple Carplay connectivity, checkerboard display and/or Bluetooth connectivity. This may be due to the software in the accessory protocol interface module (APIM). To correct the condition, follow the Service Procedure to reprogram the APIM.
• 10233597Mar 29, 2023Body and structure, Visibility (wipers, defrost, mirrors), Equipment. Some 2021-2022 Bronco vehicles equipped with a soft top roof may exhibit loose exterior fabric on the rear window assembly. This may be due to broken D-pillar clips on the rear window. To correct the condition, follow the Service Procedure to replace the D-pillar clips with rivets and washers.
• 10233695Mar 8, 2023Transmission and drivetrain. Some 2017-2023 Ford and Lincoln vehicles equipped with a 10R60/10R80/10R80 MHT/10R100 transmission may exhibit a whine noise at idle and/or while driving. This may be identified as coming from the bellhousing and the front of the transmission fluid pan. The whine noise may become louder when the transmission is at operating temperature and may increase with engine revolutions per minute (RPM) in the park (P)…
• 10233688Mar 7, 2023Engine cooling. Customers who neutral (4-wheel flat) tow a 2021-2022 Bronco equipped with a 2.7L engine or a 2022-2023 Bronco Raptor may report an inconsistent brake assist when a supplemental braking system has been installed. This may result from supplemental brake system set-up that does not account for the vehicles anti-lock brake (ABS) module entering sleep mode after a pre-determined period of time following vehicle…
• 10233656Mar 2, 2023Back-over prevention (rear camera). Some 2021-2022 Ford and Lincoln vehicles equipped with SYNC 4 may experience an error message during the gateway module (GWM) software update application which states Procedure Unsuccessful- GetConfigDataFromGIVIS. This may be the result of a server related concern. To correct the condition, download and run the Ford Diagnosis and Repair System (FDRS) application GWM-Read the Gateway Module A (GWM) Configuration…
• 10233576Mar 2, 2023Electrical system. Some 2021-2022 Bronco vehicles may exhibit a charging system fault message displayed in the instrument panel cluster (IPC) 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.
• 10232479Feb 22, 2023Visibility (wipers, defrost, mirrors), Equipment. 2021-2023 Bronco vehicles are equipped with a smart windshield wiper motor, which has the capability of sensing load of the wiper blades coming across the windshield glass. As a result of this operational characteristic/design, the operation may not be what is expected in certain conditions. The vehicle is programmed with protection features to prevent damage to the wiper motor in case of overheating, operation…
• 10232478Feb 22, 2023Body and structure, Equipment. Some 2021-2023 Bronco vehicles may exhibit a creak/pop type noise when any of the side doors are opened and closed. This may be due to incorrect door installation, alignment and/or incorrect tightening of the two bolts which hold the door to the vehicle body.
• 10232584Feb 15, 2023Engine cooling. Certain 2021-2022 Model Year Various Vehicle Lines Long Block Replacement
• 10232419Feb 14, 2023Equipment. Some 2021-2022 Bronco vehicles may encounter a concern of the A/C working intermittently and DTC P0532 stored in the PCM. If this symptom is exhibited have the technician inspect connector C1062 at the pressure transducer for corrosion and/or terminal fretting. The pins in this connector may be worn creating the intermittent A/C operation. Technicians can perform a wiggle test at this connector to duplicate the…
• 10232486Feb 6, 2023Equipment. Some 2021-2022 Bronco vehicles 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.
• 10230774Jan 25, 2023Visibility (wipers, defrost, mirrors), Body and structure. Some 2021-2023 Bronco vehicles equipped with a factory soft top roof may experience snow or sand accumulation on the vehicles interior during a strong storm with high winds. To correct this condition, follow the Service Procedure to retrofit the soft top assembly.
• 10230778Jan 23, 2023Visibility (wipers, defrost, mirrors), Body and structure. Some 2021-2023 Bronco vehicles equipped with a factory soft top roof may exhibit a headliner that is detaching from the soft top material. This may be due to the factory installation process. To correct this condition, follow the Service Procedure to reattach the headliner or replace
• 10230772Jan 12, 2023Electrical system. Some 2021-2022 Bronco may encounter a sta-bar disconnect service required message in the instrument panel cluster and a warning light illuminated with any of the following diagnostic trouble codes (DTCs) stored in the chassis control module (CHCM): C103A, C1A99, C1B03, C1B07, C1B14 and/or B1A67. To correct the condition, follow the Service Procedure to address water intrusion and reprogram the CHCM.
• 10230784Jan 6, 2023Visibility (wipers, defrost, mirrors). Some 2021-2022 Bronco vehicles equipped with a soft top roof may experience a strut that has detached from the soft top frame. It is not possible to reinstall one of these struts once they become detached from the frame. If this occurs, a service strut must be ordered which will arrive with a compression bracket which maintains the exact strut length required for installation. For installation instructions, refer…
• 10228876Dec 16, 2022Brakes. Some 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…
• 10228746Dec 14, 2022Transmission and drivetrain. Some 2021-2022 Bronco vehicles equipped with a MT88 manual transmission may experience a rotational scraping noise in ambient temps below 10C (50F) and after a cold soak with the transmission in neutral, 1st and/or 2nd gear and clutch engaged. The noise may go away 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…
• 10228800Dec 13, 2022Equipment. Some 2020-2021 Expedition/Navigator, 2020-2022 F Super Duty/Explorer, 2021-2022 Bronco/Corsair/Escape/Bronco Sport, 2022 Maverick vehicles may exhibit the wireless charger inoperative or poor performance when using some Apple iPhone models that use MagSafe wireless charging including iPhone 12 and 13. This may be due to limited compatibility with the wireless accessory charging module (WACM). To correct the…

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