NHTSA Complaint #11667864 — 2023 TESLA MODEL Y

I am writing to formally report a safety concern involving the Cybex Calisto G 360 convertible car seat. The issue pertains to a persistent rattling noise that emanates from the seat, specifically from the area near the child’s footrest, just above the belt tensioner lock mechanism. This sound occurs consistently during vehicle operation, regardless of whether a child is seated or the seat is unoccupied. I contacted the manufacturer, and their response was as follows: “After our Product Team reviewed your claim, it was determined that the amount of rattle you hear is completely normal. It passes our quality review for sound. The specific sound that is heard is from the metal rod inside the belt tensioner door.” While I appreciate their response, I remain deeply concerned. A rattling sound originating from a critical restraint mechanism area warrants a thorough safety inspection. The explanation that it is “normal” does not ease concerns about potential long-term reliability, wear, or failure of a restraint system component. Given that this noise may indicate looseness or internal movement of a part involved in child restraint tensioning, I strongly believe this issue requires further investigation by independent safety professionals. Please let me know if any additional documentation, photos, or videos would help in assessing the issue.