Side/window Air Bag problems of the 2006 Land Rover Range Rover

The passenger side airbag on the dashboard is starting to prematurely split on top of the dashboard surface around the entire outline of the airbag. The crack has progressed in a precious outline of the cutout of the airbag. After contacting Land Rover of America on multiple occasions, they considers this as a "wear and tear" and they state this will not effect the safety of the vehicle. Note: this is a common problem that owners of the 2006-2009 models have been experiencing (per multi Land Rover website forums) that Land Rover has now redesigned the dashboard on the newer models to have the cutout of the airbag already designed into the dashboard so this type of defect will not occur. I'm very concerned with this type of design defect especially if the airbag is needed during a collision whether it will function properly and the fact that Land Rover of America is instructing its customer service representatives to advise consumers that this is a "wear and tear" issue. I would appreciate for the dot NHTSA to review my concerns and conduct an investigation with Land Rover regarding this matter on my 2006 Range Rover sport. Thank you.