Ford recalls 4.4 million vehicles over faulty automated trailer software

Ford recalled approximately 4.4 million vehicles after a software flaw in its Integrated Trailer Module was found to disable trailer brake lights, turn signals, and braking functions, creating a significant road safety risk for road users. What happened Ford announced a recall of approximately 4,380,609 vehicles in the U.S. across several popular model lines, including the F-150, F-250 Super Duty, Maverick, Ranger, and Expedition), from model years 2021–2026. The problem was a software glitch in the Integrated Trailer Module (ITRM) that causes a loss of communication between the towing vehicle and the trailer, typically occurring during the initial power-up or when the vehicle exits "sleep mode." The failure can lead to the total loss of trailer stop lamps, turn signals, and, in high-series models, the complete loss of trailer brake functionality. While Ford reported 407 related warranty claims, no accidents or injuries have been officially confirmed at the time of the announcement. Why it happened The root cause is a software vulnerability in the ITRM in which a timing conflict ("race condition") between the ITRM and a control component called the CAN Standby Control bit occurs during power-up, causing the module to activate in a non-communicative state. What it means For owners, the recall represents a severe safety hazard that turns an attached trailer into a dangerous, unlit, and potentially unbraked projectile. For Ford, it raises questions about the company's testing procedures, transparency, and accountability. For policymakers, the recall signals a need for stricter pre-market software audits and more aggressive oversight of over-the-air (OTA) update systems, as manufacturers may be tempted to rely on "fix-it-later" mentalities rather than rigorous initial testing. System 🤖 Integrated Trailer Module (ITRM) Developer: Ford Motor Company; Horizon Global Inc. Country: USA Sector: Automotive Purpose: Manage vehicle-trailer communication Technology: Automated decision-making system Issue: Accountability; Safety ; Transparency Timeline ⏰ October 21, 2025: Ford’s Critical Concern Review Group (CCRG) begins initial internal investigation into trailer module communication failures. November 6, 2025: Ford closes its internal investigation, deciding against a recall. December 2025: The NHTSA discusses the issue with Ford, indicating that the lighting failures constitute non-compliance with federal safety standards. January 20, 2026: Ford reopens the investigation. February 13, 2026: Ford’s Field Review Committee officially approves the safety recall. February 26, 2026: A recall of 4.4 million vehicles is announced. May 2026: Estimated completion date for over-the-air (OTA) software deployment to all affected vehicles. Regulation 👩🏼‍⚖️ Federal Motor Vehicle Safety Standard (FMVSS) No. 108

Date it happened

2025-10-01

Product, system or model

Integrated Trailer Module (ITRM)

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