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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

Only bulletins with component: Body control module are shown. Show all

Bulletins, newest first
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.
SSM 511662022-10-31. Service bulletin. ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM. Some 2021-2022 Bronco vehicles may exhibit a condition of intermittent headlamp operation while the vehicle is OFF and have diagnostic trouble code (DTC) B1533 stored in the body control module (BCM). This may be due to the internal logic within the headlamp switch. To correct this condition, replace the headlamp switch (service base PN: 11654). Refer Workshop Manual, Section 417-01.
TSB 21-24562022-01-01. Service bulletin. ELECTRICAL SYSTEM:BODY CONTROL MODULE:SOFTWARE. Some 2021 Bronco vehicles equipped with exterior zone lighting may experience the hazard lamps flashing one time intermittently when the hazard lamps are turned off. This condition is due to the body control module (BCM) software. This condition occurs when zone lighting is activated then deactivated while the engine is OFF, or during an engine auto-start-stop event. To correct this condition, follow the Service Procedure to reprogram the BCM.

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