Is there any more information of the TB1 flag? I was planning to get a tuning box but if this is true just have to pass on it.
Quoting myself here, from an old thread;
"VAG have built and installed computers in a humble hatchback that can actually drive the car down the road, follow lanes, stop the car in traffic, find and drive into a parking space, hit the brakes if a pedestrian walks out in front of you, and bail you out of a terminal skid when you run out of talent.
This is a level of sophistication that would have been considered impossible 10 years ago, yet people are still being led to believe that it's possible to run boost, fuel and ignition parameters way outside of normal and that Audi won't notice.
[if you have a power train issue or failure] The dealer has to upload a data dump from the car, or VAG won't cover their warranty costs. This means that VAG's mainframe gets to analyse every car that comes in for engine or driveline warranty work, and it will flag up any anomalies. The human element of detection and dealer discretion has largely been removed. With the increasing sophistication of these systems (and let's face it, VAG is at the cutting edge in this field) the chances of you grenading a tuned engine and pulling the wool over VAG's eyes by taking things off the car or reflashing is nil.
Tune it if you want to, but do it with your eyes open and beware any tuner telling you their product is "undetectable" or telling you they've "never heard of a problem". It's complete tosh. If it goes bang you'll be paying for the new engine and/or gearbox. We're not talking about slapping on a pair of DCOE40's and a big exhaust anymore. The days when you could tune it, break it, revert back to stock and defraud Audi or any other maker into giving you a fresh engine are long gone."
Essentially, you take your chances;
IF you have an issue, and IF Audi detect it, your powertrain warranty is gone, and you get a big bill, if you're lucky...
The chances of the 1st IF are random, but your odds of a failure are greatly increased if you tune the car. The chances of the 2nd IF are unknown, but let's face it, with the increasing levels of technical prowess at play in these systems and Audi's general disapproval of tinkering, even if the chances of detection are slim now, they certainly aren't going to get slimmer. Recorded parameters rarely lie, and if you're the ecu records that you've been running a million psi of boost, with injector duty cycles nearly maxed out, and EGT's in the high supernova range, then suspicions are going to be raised. Add a gearbox recording a million newton metres at 1500rpm, and it doesn't take Ingolstadts brightest engineer or gigafloppiest mainframe to figure out that the car hasn't been exhibiting 'typical' behaviour.
There's a 3rd and 4th IF to consider too;
3/ If the car is leased, on Audi HP or PCP, then it's not yours to tune. The act of tuning it renders your finance agreement null and void. So, when you present your broken car to the dealer with that "what's going on 'ere? look slapped all over your Chevy Chase"*, and they decide it's your own fault, they will do 2 things. First, they will present you with a massive bill for the repair, and second, they will present you with an even bigger bill for the outstanding finance you owe.
4/ (again quoting myself)
"Should you decide to tune it, blow it up, and then try to remove the evidence of the tuning by way of resetting it back to stock before presenting the car to Audi for repair under warranty, then that is not the act of a cheeky chappie just trying it on. Its a criminal act. Specifically its an offence under the Fraud Act (2006), with potential overlaps into the Theft Act (1978). There are a number ways that these acts may be applied. They can for instance be used to charge you with mutilple offences, including, but certainly not limited to;
Obtaining services dishonestly
Fraud by failing to disclose information
Fraud by false representation
These carry custodial sentences..."
Just something to bear in mind.
Personally, despite tuning almost every car I've ever owned, I just don't think the extra power is worth the risk of a cascading clusterfuck of bad things happening if it goes wrong. It'd probably be fine, but if it goes tits up, it'd end up having been cheaper to buy an R8.
*Watching 'Lock Stock' at the moment. Sorry...