Ford recalls 4.4 million vehicles over trailer software flaw
Ford recalled 4.4 million vehicles after discovering a software flaw in the Integrated Trailer Module that disables trailer lighting and braking functions, creating a road safety hazard. The company initially declined to recall after investigating in October 2025, but reversed course following NHTSA intervention, announcing the recall in February 2026.
What happened
Ford recalled approximately 4.4 million vehicles in the U.S. across model years 2021–2026, including the F-150, F-250 Super Duty, Maverick, Ranger, and Expedition. A software flaw in the Integrated Trailer Module (ITRM) causes loss of communication between the towing vehicle and trailer during initial power-up or when exiting sleep mode, disabling trailer stop lamps, turn signals, and trailer brake functionality in high-series models.
The root cause is a timing conflict (race condition) between the ITRM and the CAN Standby Control bit during power-up, causing the module to activate in a non-communicative state. Ford's Critical Concern Review Group began investigation in October 2025, initially closed the investigation and decided against a recall in November 2025, but reopened it in January 2026 following NHTSA discussion indicating non-compliance with Federal Motor Vehicle Safety Standard No. 108. A safety recall was officially approved and announced in February 2026, with over-the-air software deployment estimated for completion by May 2026.
Reported impact
Ford reported 407 related warranty claims, though no accidents or injuries were officially confirmed at the time of the recall announcement. For vehicle owners, the malfunction turns an attached trailer into an unlit and potentially unbraked hazard.
Index analysis
The incident reflects gaps in Ford's testing procedures and initial assessment processes, as the company initially decided against a recall despite the severity of the safety flaw. The reliance on post-deployment over-the-air software updates rather than thorough pre-market testing raises questions about manufacturer accountability and the adequacy of existing oversight mechanisms for automated vehicle systems.
Governance controls
NHTSA intervention was necessary to compel Ford to reconsider its initial decision not to recall. The recall demonstrates the role of federal safety standards in triggering corrective action, though the delay between initial discovery and official recall highlights potential weaknesses in the enforcement process.
Classification
Sources and evidence
This record was researched and written by the Index, based on the following original reporting.