If your vehicle is showing top tether anchor for child seat is broken or detached, here are the most likely causes and the parts you'll need to fix each one.
The top tether anchor was likely used improperly to secure heavy cargo or was severely over-tightened, causing the metal bracket to bend, stress, or snap.
The anchor or its mounting bolt was removed during previous interior work (such as installing speakers or seat covers) and was either left out, cross-threaded, or insufficiently tightened upon reinstallation.
For anchors that are integrated directly into the rear seat back, the internal metal frame or the weld holding the anchor has failed due to repeated stress or a manufacturing defect.
The metal body panel (such as the rear window deck or floor pan) where the anchor bolts into the vehicle has rusted away, causing the anchor mounting point to detach completely.