2024 Subaru Impreza

While driving at various speeds, my vehicle consistently produces a clicking noise from the upper right-rear C-pillar area. The noise is most noticeable when the vehicle body twists slightly during normal driving, such as when traveling over uneven pavement, entering driveways, or making turns. The condition has persisted and is repeatable. The vehicle was inspected over approximately six weeks by an authorized dealership. After extensive diagnosis, the dealership identified a suspected welding defect in the upper right-rear C-pillar/body structure. The suspected defective area is available for inspection. The dealership requested authorization from the manufacturer to repair the condition under warranty, but the request was denied. To my knowledge, neither the manufacturer nor the dealership has provided any engineering analysis or technical evidence identifying an alternative root cause for the suspected welding defect. The C-pillar is a structural component of the vehicle that contributes to body rigidity and occupant protection. If the clicking noise is caused by a defective or failed body weld, the condition could indicate reduced structural integrity or progressive deterioration over time. Although no crash or injury has occurred, I am concerned that continued operation with a suspected structural weld defect could compromise vehicle safety or crashworthiness. No warning lights or diagnostic messages were displayed before or during the occurrence of this condition. The primary symptom has been the repeatable clicking noise from the upper right-rear C-pillar area during normal driving. I am requesting that this condition be investigated to determine whether it represents a manufacturing defect that could affect other vehicles of the same model.