Time to move on

cheshirecat

I dunno- the N54 is a pretty stout engine. Forged internals- problems are very rare with the engine itself even with high (15+) psi of boost.

The platform does have other issues though.

-High pressure fuel pump failures (recalled)
-water pump replacements (electrical unit that stays on to cool the turbos after the engine is turned off, wear and tear item, 60k miles est)
-carbon build-up (estimate a walnut shell blasting every 50k miles)
- turbo wastegate rattle (bmw warranty covered to 120k miles)

In my opinion, it's an excellent engine, but be prepared to pay for the maintenance. I'd personally take the n54 over the n55 any day.