I've been dealing with a frustrating slow puncture on my BMW's rear left tyre for the past couple of weeks now – I keep having to top up the pressure every few days and it's getting really old really fast. The thing is, they're run-flat tyres which I know are supposed to be more robust than regular ones, but I've heard conflicting opinions about whether you can actually repair them or if you have to replace the whole tyre once they've been driven on while underinflated. I caught the pressure drop pretty early and I've never driven on it when it was completely flat, so I'm hoping that means it's still repairable and I won't have to shell out for an expensive replacement. I've called a few tyre shops and some of them flat out refused to even look at it because they said run-flats are too risky to repair, while others said they could patch it from the inside as long as the puncture wasn't too close to the sidewall. I also noticed that there's a small nail or screw embedded in the tread which is probably the culprit, but I'm not sure if the tyre has been compromised internally from being driven on at lower pressure even if I topped it up regularly. I've been driving carefully and avoiding high speeds just in case, but I know I need to get this sorted properly rather than just keep topping up the air and hoping for the best. A mate of mine who works in Sharjah mentioned a place that does Advanced Tyre Repair at 800Sayara Sharjah and said they actually use the proper vulcanization process for run-flats rather than just sticking a plug in from the outside, which sounds like the kind of quality work I'm looking for. Has anyone here successfully repaired a run-flat tyre and had it last without any issues, or is it really true that once a run-flat has been punctured you should just replace it regardless of where the damage is? I'm trying to balance safety with cost here because I know tyres are one of those things you really shouldn't compromise on, but I also don't want to replace a tyre that could have been perfectly fine with a proper repair.