Came here to say thank you for the info. Just bought a ‘13 X5M with 90K mi. Upper pan was leaking so I decided to get it out of the way, but kept going back and forth on replacing the oil pump with the updated unit. I’m glad I did. The engine had some noise at idle and now that the new pump is in and chain properly tensioned, the noise is completely gone. I’m just left with the sweet sound of high pressure injectors ticking away. I borrowed the special tools from a friend and measured the chain installed. It was a tad loose but nothing major. The old pump was mounted tight to the engine thankfully. Now that the idle is quiet, i’m fairly certain the oil pump was failing which may explain the catastrophic failures and updated part from BMW. I would definitely consider the oil pump normal maintenance on the S63 after replacing it.
Pics of the revised oil pump below:
