Just reading up on Triumph Tiger (I know it's a bike) and found that Triumph offer a service via their website whereby you type in the VIN number of a bike and it presents you with all the safety and warranty recall related data and whether that bike has been seen to. Would this be too much for a car-maker to offer ?
Would it be too much for a car maker to offer? No.
Would it give too much bad publicity when people realise there are half a dozen "secret" tweaks needed? Yes.