J. je.saint Discussion starter. 1 post · Joined 2012. #1 · Jan 6, 2012. I bought a certified 2008 X5 with ~48.5k miles a couple of months ago. Everything was relatively well until the iDrive screen decided to intermittently stop working properly. Basically, the screen goes blank every now and them but not completely black. I have a 2009 X5 with only 60 000km. It started running on 4 cylinders and wont come back up to 8 again. I took it to a reputable BMW accredited workshop. After testing they found low compression on two cylinders (7&8) and claim this is the cause. Engineering shop stripped the head and found valves slightly burnt. l6XZ.

bmw x5 4.8 is common problems