Lots of makers going this way. BMW do this on Minis, the run flats are really expensive. A friend of mine is onto his 3rd as they seem to fail to keep pressure on his car. V expensive too. Another friend had a Corsa with the repair kit, he used it & took the wheel to the tyre centre. The whole wheel needed replacing as the tyre dealer said it was impossible to remove from the rim. May have been fishing for work?

Steve.

Rim would be fine, just needs scraping.