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Repair costs have been HUGE for my Audi. Even relatively simple things like hoses are at least three times what they would be for a Honda. And getting parts has been a nightmare, it took months to get an Air Conditioner hose, and the only reason I got it as fast as I did was because the Office of the Attorney General of Texas called Audi on my behalf (actually, I got the car repaired with a hose found at a junkyard, but I had already involved the Attorney General's Office, so when Audi eventually offered the hose for free, I took it just in case I ever needed another one).
It also takes considerable time to get in for service. When I had a broken bushing, I had to wait five weeks to get in to fix it. In Dallas, there was a month wait to get in for the oil changes (they come free for the first 50K miles) and standard service that the car requires. The dealerships can also be pretty incompetent. A dealership fixing a common A4 problem (one so common that Audi paid for 80% of the cost of repair) for me caused damage to the engine that required me buying a completely new engine a few months later (actually, I bought a used engine, but it was still mucho expensive. Of course, picking that used engine, which actually had fewer miles than my original engine, ended up meaning that my Audi can no longer pass exhaust tests since it leaks oil into the exhaust system and that burns off every time I start the car. That's for an engine with 40K miles on it.)
And when the OKC dealership dropped my car off, they left it for me with a dead battery and left it in a random parking lot (while taking the key back to OKC with them) and didn't bother to inform me that they left the car or where they left it. It took three days for me to track it down and six weeks to get my key back.
And to top it off, the car is apparently developing an electrical problem. The stereo is freaking out, the cruise control isn't working properly. Oh, and the air conditioning isn't cooling anymore. This all on a car that is only 3.5 years old.
I would never buy an Audi again. Other people have had good luck with them, but I have had nothing but trouble.