I heard a pop sound when accelerating and the check engine light came on and I loss a lot of power. I called the Audi dealer and they told me to drive it in. I left it with then and they told me they couldn't replicate the issue after a couple of weeks. I went to pick it up and the problem still existed. I went back and grabbed a service tech and we drove it around the block together. He asked that I accelerate at which point white smoke started pouring out of the back. We drove it back. They diagnosed it later as being a blown turbo. I had the car towed to a different shop to replace the turbos and they said the engine was destroyed and all cylinders were marked. I towed it back to Audi and they told me that because it had aftermarket parts they weren't responsible. They agreed to flush the oil several times and sell it at auction as is which cost me to lose nearly $30,000. They were liable for the problem because they had the car before the catastrophic failure. They miss-diagnosed what we all know now was a failure of the PCV valve and a clogged oil screen. It was on a drive with them after not diagnosing it that the turbos had a critical failure and took out the engine. This would have never been an issue had they properly diagnosed the failed PCV and oil screen problem. They pressured me into settling with their proposal or else they threatened to return the car to me and do nothing.

- Gilbert, AZ, USA