BMW 745i Questions

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Got an oil change drove everything normal and quite. Next morning start car now it's making a sort of Knocking sound. Bring car back to shop that did oil change they said possible enough oil wasn't put in. So they drained all of oil and put more in it the noise still there so they took belts off and the noise stopped.
On BMW 745I 03 fault code 5e9a what is it
Car just does nothing
What seems to make the problem better or worse? N/a
How long have you had this problem? On and off
Changed the head a week ago set timing perfect and camshaft sensors. Cylinders 5,6,7,8 are running fine,
Don't hear anything it's hat the car stopped on me in the middle of the street, had it towed, found out it needed an alternator
Carfax reveal car has same mileage from 2007 to 2011. Also show no accidents. The meters appear red when engine on, but appear darken when engine off. The meters visibility are obscured
The appearance looks like water damage. I pulled carfax and no accidents, however carfax does report the vehicle mileage of 23k was the same for 4 years from 2007 to 2011. When the vehicle is on the discoloration appears red, when engine is off just looks darken. Visibility of the 2 gauges are obscured
Directly and also my battery goes dead overnight what is it
I have change the coils plugs cam shaft sensors 02 sensors, But I cant rid of these codes p0363isfire detected fueling disable, p1343 misfire cylinder 1 with fuel cut off,p1347 misfire cylinder 2 with fuel cut off and p1345 misfire cylinder 3 with fuel cut off. Now I am going to replace the fuel injectors to see if that will fix the problem
Passenger seat wont move backwards only forward
Intermit transmisn failure
My 19yr old son was was working and doing great and I bought him a 745i . Stupid I know . But he got a DUI and has no license and refuses to give me the key and continues driving it . So I need to figure out a way to make it not run . Can someone please help me out ????
Replaced ccv and clean maf and throttle body codes still come back. Car has 142k
I wont to replace the purge valve and the location of the purge valve and are the purge valve and vapor canister purge solenoid the samething
This is the first time I am experiencing an issue with my fuel indicator after 170,000 miles put on my vehicle. There isn't a way to see how much fuel is in my tank now because it will show that it is empty even after filling the tank up all the way.
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