WenmarOpen by Wenmar Pro

Service bulletin SU4 P4 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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10244807
Published by NHTSA2023-11-03
Manufacturer's numberSU4 P4 BRONCO
Manufacturer's date2023-10-19
NHTSA componentEQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT; SERVICE BRAKES

NHTSA's summary

Software Update SU4 P4 for 2022-2023 Bronco is now available. Quality improvements include: - Prevent unintended Fuel level MIL after future OTA updates. -Various Apple Carplay quality improvements -Electronic Brake Boost (EBB) interaction enhancement during neutral tow operation.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Equipment and accessories

Vehicles listed
FORD BRONCO2022, 2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20263102026-06-24. Accessories
25V6850002025-10-10. EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER
23V3790002023-05-26. EQUIPMENT:OTHER:LABELS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
SSM 552402026-10-13. Service bulletin. Some 2021-2024 Bronco vehicles may exhibit an illuminated red brake warning indicator with diagnostic trouble code (DTC) C0049:01 stored in the anti-lock brake system (ABS) module. This may be due to pin fitment at the brake fluid level sensor connector. To resolve this concern, replace the brake fluid reservoir and replace the brake fluid level sensor electrical connector C1052 with service pigtail wiring kit 3U2Z-14S411-BXAB. For claiming, use causal part 2L210 and labor operations 2140A and 2219D45WR.
SSM 544312025-12-10. Service bulletin. Some 2021-2024 Bronco vehicles may exhibit an illuminated red brake warning indicator with diagnostic trouble code (DTC) C0049:01 stored in the anti-lock brake system (ABS) module. Replace the brake fluid reservoir and the brake fluid level sensor electrical connector. Do not disconnect the brake fluid level sensor electrical connector, cut the connector 3-4 inches (75-100 mm) from the connector end and leave the brake fluid level sensor electrical connector attached to brake fluid reservoir. Include these parts in the same package when returning warranty replacement brake fluid reservoirs. The brake fluid reservoir with the electrical connector still connected should be packaged in the original box to protect it during shipping. For claiming, use causal part 2L210 and labor operations 2140A and 2219D45WR.
SSM 543622025-11-12. Service bulletin. Some 2021-2025 Bronco vehicles may exhibit an illuminated red brake warning indicator with diagnostic trouble code (DTC) C0049:01 stored in the anti-lock brake system (ABS) module. Replace the brake fluid reservoir and the brake fluid level sensor electrical connector. Do not disconnect the brake fluid level sensor electrical connector, cut the connector 3-4 inches (75-100 mm) from the connector end and leave the brake fluid level sensor electrical connector attached to brake fluid reservoir. Include these parts in the same package when returning warranty replacement brake fluid reservoirs. The brake fluid reservoir with the electrical connector still connected should be packaged in the original box to protect it during shipping. For claiming, use causal part 2L210 and labor operations 2140A and 2219D45WR.
SSM 524762024-05-03. Service bulletin. 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 card for an accessory keypad is lost, follow these steps to recover the code. Dealer Key Code access is granted through the Dealer Program Enrollment System (DPES); dealership management can authorize users. The authorized user must go to FMCDealer.com > Parts and Service > Parts Product Line Information > Keys/Entry Devices > Aftermarket Keyless Entry Keypad Code Access. Follow the instructions on the screen to obtain the master code for the accessory keypad.
TSB 24-20802024-04-03. Service bulletin. This article supersedes 23-2024 to update parts list to include rivets. 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.
SSM 523282024-03-20. Service bulletin. Some 2021-2024 Bronco/F-150, 2023-2024 Escape/F-Super Duty vehicles equipped with SYNC 4 may experience a concern during accessory protocol interface module (APIM) programming where the vehicle's center display screen indicates USB Error. This may be due to a lack of memory space available to perform the APIM software update. If it is a memory concern, the Ford Diagnosis and Repair System (FDRS) will provide an option to delete the voice application. Re-enter the module programming and when prompted, do not select first option - SYNC Module (APIM) Software Update, select the second option - Delete Voice Application(s) From Module. Once deleted, run the SYNC Module (APIM) Software Update as directed, this will update the software and automatically reload the voice app. If the voice delete option is not available, continue with normal diagnostics in the Workshop Manual, Section 418.
TSB 24-20402024-03-07. Service bulletin. Some 2021-2024 Bronco vehicles may exhibit paint damage on the rear quarter panel due to contact with the soft top rear window. This may be due to a contact condition that can occur during extreme off-road driving between the soft top rear window and the rear quarter panel. To correct the condition, follow the Service Procedure to modify the rear window.
TSB 24-20322024-03-07. Service bulletin. Some 2021-2023 Bronco vehicles built on or before 28-Feb-2023 may exhibit water entry into the rear trunk. This may be due to a lack of body seam sealer at the floor panel to trunk sheet metal joint. This repair procedure addresses water entry from underneath of the vehicle into the rear trunk area (jack storage compartment). This article does not apply if water is entering the vehicle from above the rear trunk area (such as from the roof, rear window etc.). To correct the condition, follow the Service Procedure to apply seam sealer to the forward trunk to floor panel sheet metal joint.
TSB 24-20212024-02-06. Service bulletin. This article supersedes TSB 23-2213 to revise Figure 1, add 2024 vehicles and the part list. Some 2021-2024 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.
SSM 522252024-02-06. Service bulletin. Some 2023 Bronco vehicles equipped with a B&O sound system and built on 28-Jul-2023 and through 29-Aug-2023 may experience an intermittent loss of audio from certain speakers. Function should return with a key cycle and the symptom may return within every 1-20 additional key cycles. This may be due to the software within the audio digital signal processing module (DSP). To correct the condition, reprogram the DSP module to the latest software level using the Ford Diagnosis and Repair System (FDRS) diagnostic scan tool. For claiming, use causal part 18B849 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.