First I want to say that the car was never disabled and the engine always operated on full power tons of power

But I have a couple of issues and considering I was under warranty and also had a friendly BMW advisor I got many things done on the car.

The one big issue was oil consumption / leak.
I always had heavy oil consumption, but looking at it closer I realized I had first a couple of engine seal leaks. That were costly to repair. I will not list them all, but I had a bunch of seals redone: heads, oil pan, and more..
After that I had the valve stem seat redone that was a big one. The car was not smoking that much but at full throttle you could see a bit of smoke coming out, that bill was like $10k when they were done with the car. Because so many parts needed to be disassembled (engine stayed in the car), so a couple of smaller items broke during the work I guess, so they replace a couple of lines, pumps and stuff in there.

The second main issues were with turbo coolant leak. Nothing major but I had the usual top lines to the turbo replaced, you can see these very often on forums, the fitting start to leak slowly. Pricy as the line are very complex. Luckily they were under warranty as they are part metal. If they were all rubber I would have been out of luck, under on CPO.
Then I had auxiliary pump replaced and coolant tank crack replaced.

These really were the big items for me. Again nothing terribly wrong but just very time consuming each time because the engine is so jam packed with lines, everything takes times and at a $180 dealer rate, it goes really high fast !

Aside of that I had the customer care package done with all injector replaced and a bunch of lines and sensors. Also had drive shaft done as part of the recall.

FYI I am giving you prices the dealer charged to BMW NA. I personally did not pay a penny on all these. All my invoices are at zero but they ask me each time to sign the one which has the dollar numbers on it, and I always read it with amazement.

I have to say that BMW did a bunch of recall and warranty extension for down defect so that are doing something good there.

I think all these issues really reflect what most N63 owner have seen, again it can be pricey but I have never seen any catastrophic failure on the forums.

Also I guess repairing all these things could have been done for a fraction of the cost at an independent shop.

My service advisor is telling me that the earlier N63 really get all the issues and that the new N63Tu has been very reliable for them. He told me earlier diesel and gas engine were the same. So all in all try to buy the later models.... Or an N63 like mine were all big items have been done