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The big failure items like HPFP and injectors have mostly been fixed with the latest part revisions. Problems got blown out of proportion by people online, rightfully so, spending MSRP on a new car and having to deal with issues. However by now most of those issues have been sorted out. Index 12 injectors are solid for the most part and the latest HPFP can hold up. Wastegate rattle was also fixed.
I consider N54 legendary, definitely not overrated, and I'm happy with mine, it was revolutionary at its time being a high compression direct injection turbocharged engine. I don't know of any other mass produced engine at the time that had that. Now it's everywhere.
It's quick with a mild tune and plenty of fun, but I'm not out drag racing B58s or N55s and expecting any spectacular results.
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