Check engine light E70 X5 50i

[TahoeM3]

I have been having a ton of problems with my ‘13 E70 50i since the warranty expired 2 months ago. It was a certified car and has about 60k miles. It has been in and out of the shop about 5 times during this time. This is my wife’s daily driver, so I need it to be reliable, and it hasn’t been.

Most recently, we got a check engine light and my wife took it in for service. They said the O2 sensors needed replacement as well as the dmtl pump. That cost $2k. Oh and they wanted to replace the rear brake rotors and control arm bushings, although they acknowledged they weren’t actually bad, for another $2k. I declined that.

She picked the car up after the new O2 sensors and pump were replaced. The following day, the check engine light came back on. I ran a code reader and got P2096 and P2198. Back to service it went. The SA called the next day and said the intake charge pipes and crankcase vent hoses need to be replaced for yet another $2k. I declined because at this point I don’t trust them. When I picked the car up, there’s a clunk when turning that wasn’t there before and the engine cover was not attached.

Has anyone had these problems? And if it actually is the charge pipes and crankcase vent hoses, what should I reasonably expect for replacement cost? They look intact, and it seems extremely unlikely that they all started leaking the day after the oxygen sensors were replaced. This is my 12th BMW and by far the most problematic. It’s also the most difficult dealership. I would upgrade to the new one, but I’m not a fan of the look since 2014. I may be done with BMW for good after this one. Any suggestions (besides don’t own a BMW out of warranty)?