I dunno, I wouldn't touch a N63 without a warranty. Based on the common fuel injector failures, HPFP failures, same damn oil leaks as the N62, crap valve stems, Timing chain failures, MAF failures. Maybe that is why I see 2011's with 100K miles going for 16k? https://www.cars.com/vehicledetail/d...0208/overview/

I'll bet it smokes!

But on the upside, you can idle at the Starbucks window when it hits 80K+ miles, then gas it as you leave and say I'm Batman as you leave a smoke screen :-)

Here is the story about N63 a bomb on wheels; about the catastrophic failures folks are seeing BMW 4.4-liter N63 Engine Experiencing Frequent Reliability Problems - autoevolution

BMW N63's eat batteries Enginerdy: Why BMW's N63 twin-turbo V8 eats batteries


Bottom Line, I'd say the N63 is quite possibly the least reliable motor I've seen in a new car, given how many expensive and even catastrophic repairs they take to go to even 80k-100K. I would not consider the N63 engines to be low maintenance/low cost. Especially as they age, keep it while under warranty/cpo then dump it.

I will say that the Diesel engines themselves are actually more reliable than an N62/N63 however their emissions systems are crap in terms of reliability. The M57 at least doesn't suffer from oil leaks, valve stem seal failures, coolant pipe failures, etc. Just a lot of SCR tank failures and CBU.

So I think the bottom line take away is..... BMW dosen't build durable engines. Here is a piece for Jalponik. Keep in mind I love my BMW's as I own 3 currently.
BMW Engines Are Gigantic Pieces Of Shit