2021-2025 Ford Bronco Passenger Airbag: SRS Lights, Recalls, and Replacement Guide

CRITICAL SAFETY WARNING: Professional Installation is Mandatory

Why DIY Airbag Replacement is Dangerous and Legally Risky

• Accidental Deployment: Airbag systems have a backup power supply. Even with the vehicle's battery disconnected, the system can hold a charge sufficient to deploy the airbag if handled improperly.
• System Failure: An improperly installed airbag may fail to deploy in a crash or could deploy incorrectly, increasing the risk of injury.
• Legal Liability: It is illegal in many jurisdictions to install non-functional or counterfeit airbags. If you sell the vehicle or if it's involved in a future accident, you could be held legally liable for injuries resulting from the tampered SRS system.
• System Recalibration Required: After replacement, the Restraint Control Module (RCM) must be reset and the system must be tested using Ford-specific diagnostic tools to clear crash data and ensure all components are communicating correctly. Generic OBD-II scanners cannot perform these functions.

Understanding the SRS Warning Light

The most common sign of a problem with the passenger airbag or any part of the SRS is an illuminated airbag warning light on your dashboard. When this light is on, it means the entire Supplemental Restraint System is disabled as a safety precaution.

This means that in the event of a collision, NONE of your airbags will deploy.

Common causes for the SRS light include a faulty airbag module, damaged wiring, bad crash sensors, or issues with the seatbelt pretensioners. A professional diagnosis with a specialized scan tool is required to read the specific Diagnostic Trouble Codes (DTCs) and identify the source of the fault.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

Several recalls and a TSB have been issued for the Ford Bronco lineup that relate to the airbag system. It is crucial to check your vehicle's VIN on the NHTSA website to see if it is affected.

• NHTSA Recall 25C27 / 25V396 (May-June 2025): Affecting certain 2025 Bronco models, this recall was issued because the active vent flap on the passenger airbag might not open as intended during deployment. This could cause the airbag to be too rigid, increasing injury risk. The remedy is a complete replacement of the passenger airbag module by a dealer.
• NHTSA Recall for 2021 Models (October 2021): A recall for 553 units of the 2021 Bronco was issued for passenger-side airbags that may have been folded incorrectly during manufacturing. This could cause improper deployment. The fix involves replacing the passenger airbag module.
• TSB 21-2297: This Technical Service Bulletin addresses an illuminated airbag warning light with DTCs B1404:13 and/or B1407:13 in some 2021 Bronco vehicles. The issue may be caused by contamination in the wiring harness connection to the side airbag, requiring a connector replacement.
• Bronco Sport Recalls: Note that several recalls exist for the Bronco Sport model, which is a different vehicle sharing a similar name. These recalls do not apply to the full-size Bronco.

Buying a Used 2021-2025 Bronco Passenger Airbag

When replacing a deployed airbag, a recycled OEM part is a viable, cost-effective alternative to a new OEM part. However, extreme caution is necessary to ensure the part is safe and compatible.

Inspection Checklist for a Recycled OEM Airbag

• Guaranteed Non-Deployed: Only purchase an airbag from a reputable seller who guarantees the part was sourced from a vehicle where the airbags did not deploy. There should be no signs of heat, tearing, or stress on the module housing.
• Intact Connectors: Inspect all electrical connectors. They should be clean, free of corrosion, and not cracked or broken. The wiring pigtails should be undamaged.
• Match Part Numbers: Carefully match the OEM part number to your original unit. While part numbers may be superseded, starting with a direct match is the safest approach. Known part numbers include M2DBS044A74AH, M2DZ-78044A74-B, and M2DZ-78044A74-C, among others.
• Check for Physical Damage: Do not buy an airbag with any cracks, dents, or significant cosmetic damage to the housing.

Compatibility Warning

Replacement Cost Comparison

Costs can vary based on your location and the specific part number required. The following is an estimate to help understand the value of a used OEM part.

Note: After a deployment, other components like the Restraint Control Module (RCM) and seatbelt pretensioners will also need replacement, significantly increasing the total repair cost.

Frequently Asked Questions (FAQ)