US agency upgrades probe into JLR vehicles' steering troubles

• The investigation affects 331,559 vehicles including Range Rover and Range Rover Sport models spanning the 2014-2022 model years
• Fractures occur at the joint where the steering knuckle attaches to the upper control arm ball joint, potentially causing detachment of the upper suspension arm
• NHTSA will investigate component design, assess safety risks, and evaluate recall remedies as part of the upgraded probe

Summary

Key Development: The U.S. National Highway Traffic Safety Administration (NHTSA) has escalated its investigation into Jaguar Land Rover (JLR) vehicles from a preliminary inquiry to a full engineering analysis on April 28, focusing on critical steering component failures.

Affected Vehicles: The probe covers 331,559 vehicles, specifically Range Rover and Range Rover Sport models spanning the 2014-2022 model years.

Safety Issue: The investigation centers on reports of front aluminum steering knuckles fracturing at the joint where they attach to the upper control arm ball joint. This defect can cause the upper suspension arm to detach, potentially resulting in complete loss of vehicle control and significantly increasing crash risk.

Investigation Scope: NHTSA initially opened a preliminary investigation in 2023 after receiving multiple reports of these fractures. The upgraded engineering analysis will examine component design, assess the full extent of the safety risk, and evaluate potential recall remedies.

Company Background: Jaguar Land Rover is a UK-based manufacturer and wholly-owned subsidiary of India's Tata Motors.

Market Implications: This escalation represents a serious safety concern that could lead to a major recall affecting over 330,000 premium vehicles. The investigation poses reputational and financial risks for JLR and parent company Tata Motors, potentially impacting sales and requiring substantial remediation costs. The upgrade to engineering analysis typically indicates NHTSA has found sufficient evidence of a safety defect, increasing the likelihood of a formal recall order.