The U.S. National Highway Traffic Safety Administration (NHTSA) has escalated its investigation into certain Jaguar Land Rover vehicles, upgrading it to an engineering analysis after reports of potential front suspension failures.

The probe covers around 331,559 vehicles, including Range Rover and Range Rover Sport models from the 2014–2022 model years. It follows complaints that front aluminium steering knuckles may fracture at the joint connecting to the upper control arm ball joint.

According to NHTSA, such a failure could lead to detachment of the upper suspension arm, resulting in a loss of steering control and significantly increasing crash risk. The agency initially opened a preliminary evaluation last year before deepening the investigation.

As part of the engineering analysis, regulators will assess component design, evaluate the safety risk, and review potential recall remedies. Jaguar Land Rover, a UK-based automaker owned by Tata Motors, has not yet announced a recall related to the issue.