well. there you have it! keep it, stay off gas when you dont need to go like a maniac(that'll save some petrol) and worry not! seldomly have I encountered a brand new S3 with problems due to an official engine upgrade... I do not know man but the most common are air-temp sensor and blow off valve not working properly. But, hey! both of these exist in special trims from serious manufacturers like Forge et al
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