120k miles on my 2015 a3 with a stage 1 tune. I did timing belt, tensioner, and water pump around 100k miles. Costed me like $1k. Also did spark plugs and a new battery, which was another $600.
New APR Spark Plugs, APR Ignition coils, PCV and Hoses
Audi A3 spark plugs work like a charm. Stage 2+ & fully upgraded supporting hardware.
After I was done installing the new plugs and coils, I started the car and immediately noticed how much smoother the idle was. I then went for a drive and was really impressed by how much smoother and consistent the power delivery was overall, not to mention the graciously absent misfire under load.
I've been running these Denso's for almost a year now, seems to be a good plug for the price! :thumbup:
Out with the old and in with the ngk 94833
Don't use AutoZone crap
Currently just swapped to Denso's IK20 like 2 months ago. They run pretty good. But now its mid summer over here and the car runs a little bit underpowered at those high temps.
I've had my 2006 Audi a3 3.2 quattro dsg for 5 years now, and every year or so I will have an issue with a misfire on cylinder 6. It is always cylinder 6. I use the recommended NKG IZKR7B(7563) plugs. I often find that the cylinder 6 plug has a crack on the ceramic insulator around the electrode. On one of the plugs, half of the insulator is missing. Replacing the plug always fixes the misfire. I also noticed most recently when I removed the damaged plug, it was very hard to turn and some of the aluminum from the head has fused to the threads, leading me to believe that the cylinder is getting too hot.
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This part for Audi A3 is made around the world. We have reviews for spark plug manufacturers from countries such as: Germany, Japan, USA .
In March 2026, the ranking of spark plug for Audi A3 on PartReview included 4 manufacturers. It is based on 9 reviews and 29 votes.
Last month, PartReview users preferred OEM Audi. 20% of positive votes went to this manufacturer.
In second place: spark plug Denso — 10%.
Third place: NGK with 10% of the votes.
In the overall ranking of spark plug, which aggregates opinions of owners of different car makes and models, these brands hold the following positions:
After seeing which spark plug owners of Audi A3 prefer, check other popular parts for this car. In March 2026, leaders on PartReview were:
