Experience with the 7 year guarantee?

I would be interested to know how your experience with the 7-year guarantee is. I have heard, for example, that kia has been embarrassingly careful not to exceed the inspection intervals (I mean now not 5000 km, but maybe 500 km or so.) Is that true, that the guarantee is forfeited, for example, if you drive with 30,500 km to the first inspection, although you should have been there already at 30,000 km?. Of course, the manufacturer is certainly the rules, but would that mean, that for example after 2years (i.e. 30,500km = 500km too much, the remaining 5year guarantee has expired)