I doubt someone would say something that may be detrimental towards their business interests if it is true- but there are many tuned cars on this forum and the UK site, I've not heard of any of them having major issues. If you are really worried about it, tuning might not be for you! There is still a risk at the end of the day, albeit a minimal one given the anecdotal evidence I have.Ironic this thread is showing up right below the "My engine blew up thread". I'm a huge fan of these types of upgrades but after reading the above horror story, now I'm a little hesitant to do the tune. Perhaps Jag could chime in?