BMW of North America is recalling 6,400 2014 model-year X5 sports activity vehicles to fix the rear side door locks so they’re sufficiently childproof, the National Highway Traffic Safety Administration reports.

The recall covers X5 SAV vehicles manufactured from Dec. 12, 2013, through March 10, 2014, and equipped with the soft close automatic option. In these vehicles, the rear side door lock mechanisms may not have been manufactured to correct tolerances. When the inside door handle is pulled, the previously engaged child safety lock can disengage, NHTSA said. As a result, the faulty lock might allow a child to pull the door handle twice and open the door, posing a safety risk.

BMW dealers will inspect these rear door locks and make any necessary replacements free of charge. The recall is set to get under way this month.

Vehicle owners can reach BMW customer service at 1-800-525-7417.