Dion, I totally understand where you're coming from.
The difficulty is, however, that there needs to be a certain level of protection for both the consumer and the tuner in this case.
Firstly, we tuners do not (and I hope I speak collectively here) sell programmes that have never been tested before - occassionally, there are circumstances where a tune is being brought over to the local market; however these tunes have already been developed in say the UK, etc. so the "testing" here is just to verify the expected operation. As such, your car is not a guinea pig - if something in your car does go wrong when there are dozens of other cars running the same tune without problems... should the tuner be to blame?
Unfortunately with a modern car's powertrain, there are infinite combinations of things that can potentially cause damage to the engine. There are probably twice as many as I'm about to list, but here goes:
* Lubrication problems
* Cooling problems
* Bad fuel
* Camshaft timing off
* Faulty knock sensors
* Failing fuel pump
* Faulty MAF/MAP
* Faulty boost solenoid
* Vacuum/boost line leaks/disconnects, etc.
* Boost leak
* Wastegate leak
* Faulty wastegate
* Collapsed catalytic converter
* Faulty O2 sensors
+ MANY more
All tunes, including the stock program, rely on all the above + many other unmentioned components in order to work properly; now, it would be *fairly* safe for tuners to offer say, a 1 year warranty on cars <2 years old simply because items in the above list, as well as many other unlisted items, tend to not start failing until after a few years. I have seen some companies in the past offer warranty with these kind of conditions (ie. Wetterauer), but have since stopped offering this.
I hope this answers your questions; for what it's worth, with a 2.0TFSI you shouldn't need to worry no matter which tuner you go with - the engine is very common and there are hundreds if not thousands of upgraded 2.0TFSI's in this country already so you can rest assured the only risks you may be taking is if there are existing issues with the car, which, again, the tuner should not have to cover.
It is true that under greater loads; the potential for damage is greater - this cannot be denied. However, if everything in your engine system is in a healthy state, the risk itself is very minimal. I do explain to all my customers that yes, with a chip, the turbo is unlikely to last as long as it would have if you left the car untuned - just like running an engine at high rpm more often, spinning the turbo faster is also sure to reduce the service life - but for most people, the benefits outweigh the disadvantages.
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