I got a misfire code on one cylinder so I took out the spark plugs and found that they were badly worn and the gap was way above specification due to wear. I replaced them with a set of these original spark plugs about a month ago and now my A3 is working great. From my research, this is the spark plug sold and used by Audi dealers on my car. While not cheap compared to jobber candles, it is certainly a lot cheaper than buying from a dealer. Can't ask for more.
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