NHTSA Complaint #11709473 — 2014 BMW X5

Product: Diono Monterey 2XT Highback Booster Issue type: Child restraint usability / fit concern There is a significant height usability gap between Diono’s convertible seats and the Monterey 2XT booster. My child is approximately 32”–40” tall and cannot safely use either seat, leaving no appropriate Diono option during this growth range. This presents a real-world safety and usability issue for caregivers attempting to follow manufacturer guidance. I have attempted multiple direct contacts with Diono for clarification or exchange options, but no functional escalation contacts exist. This complaint is submitted to document the usability gap and request manufacturer review and some kind of help in rectifying this clearly safety issue. Thank you for your attention to this matter.