I brought an x5 4.8is a few months back against everybody I knows and even my better judgement....The dealer seemed a bit dodgy but he is second hand car salesman and the issue seemed cometic...ha!
By the way, It's the car I mentioned in the following thread
http://xdrivers.co.uk/forum/https://xdrivers.co.uk/forum/viewtopic.php?t=1
Anyway so far I have had the following problems
Sunroof rear stuck open.
I have got it closed but I probably shredded the manual slot you put the allen key in. I obviously didn't read the bit where it states that you can only close the front sunroof that way :-[.
I still need to do the permanent fix for that so expect some fun from that ::). I checked the function 5 or 6 times before buying and once a week since owning but now it's broken I can see why. The ramp at the back of the guide has deteriorated quite badly so it was just a matter of time.
lower control arm ball joints
my x started to do a great impression of a squeaky old pram a few weeks ago.I did a bit of googling and thought I had pinpointed it to a ball joint took it to a local mechanic because I don't know what I am doing. The mechanic confirmed it was lower control arm ball joint. I then decided to get a MOT done because I didn't know what else could be wrong because the faking £260 I paid dreeka for a user car inspection was absolutly faking worthlesss :rant: :rant: :rant:
anyway 3 failures and 3 advisories
both lower control arms and passengers droplink had worn rubber.
Advisories were wipers,cv boot and oil leak. Got to keep an eye on the oil level and get the front cover off..I notice the car is always smoking not thick white oil smelling smoke just a wispy smoke but this happens even when the car is up to temp. :hmmm: more investigation needed.
so I brought lemforder replacement parts and set about replacing them after reading the bentley bible and tis and consulting many a youtube video. I thought I had enough knowledge to get the job done. Wrong what I assumed was 2 hour job took me about 7 hours over 2 days. Most of that time was spent pleading with the nuts to come off...I got them off on the drivers side and was in quite a bit of agony but I did it :victory:
However I made the deteriorated boot worse by tighten the ball joint nut right up against it...no other way .The boot had to go but I wanted it to last as long as possible. a small amount of grease leaks out if you press it in the right place now :'( so this is on my todo list for the next few weeks . Next day I started on the driver side I decided to you use some penetrating spray which I already had( Idiot! right..why didn't i use that before) AND my corded impact wrench all nuts came of in a matter of seconds :blink: no pain no screaming no contorting myself...aaaarrrghh idiot. I should have used that in the first place anyway everything went smooth. I did notice that the air bag deflated when I removed the height sensor on the drivers side but not on the passengers side anyway swapped everything tighten everything to torque...once I researched how to do this with the wheels off. Great All done not bad for a complete idiot who has only jacked up a car 3 time in his life.....then SLS inactive error( :'( :'( :'( ouch 2 out of 3 expensive E53 issue) I am not sure why this lit up but I am sure it something to do with my stupidity.
Other issues and observations
The passenger side mirror does a ed-209 death rattle when i opens and close.. Ordered a replacement motor and will tackle this one day.
my dvd player doesn't work...never really checked because the tv turner was analogue and I am going to rip it all out for a touch screen unit anyway but my car has DSP unfortunately :puke:.
The upgraded maps DVD just sent my satnav on the fritZ and I have noticed the head unit resetting itself ...radio stays on though.
I thought tape was old in 2004!
disconnected phone button..but the bmw scanner flew in to save the day
The rear bumper has dropped slightly so I will have to remove that and see what is going on...rusted clips and a slight knock when I was "testing" how good the pdc was :-[
The head lights twitch up and down, I guess this is to do with the adaptive xenon but why do that when I am just sitting on the driveway.
The car gives off a little cough when idling like it has just stumbled

When I turn the steering wheel the dash board gets brighter...
I checked the battery (halfords) which reads 12.something and 14.something when I started
but I was by myself so I could not do a full test.I will probably get a bosch s5 to be safe.
The ticking time bomb known as webasto AUX heater also scared me for a while too

There are plenty other mishaps lost oil caps, dropped fusses, scratch from seat belt ARRRRRRGHH this one hurts :rant:, no locking wheel nut...broken replacement wheel nuts...My girlfriend's "I told you not to buy it" face she admitted it was nice right before it started breaking down now but now we at "the don't talk to me about that car" stage already ::)
I will report back ass various assortment of thing break off...or are broken off my a nameless party in future