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BMW S63 V8 engines are mainly based on N63 which are notorious for bad reliability. Later variations of N63 (TUs) and S63s are typically better than older generations of N63, but I would definitely pick AMG over S63 in terms of reliability. If you want a reliable BMW go with inline 6. The new S58 engine is a masterpiece.
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Last edited by Sedoy; 12-27-2021 at 12:09 PM..
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