BMW 740iL Questions

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car battery kept draining . Mechanic disconnected navigation device & cd player. Now radio goes off every 45 seconds or so.
the lite stays at -40
Hello I have a check engine light on in my car it says Bank One below threshold and now recently another one came out saying circuit low circuit coolant but the car does not overheat can anyone help me The codes are p0420 and p0116
This words come up when I'm driving the car
Hi guys brand new here need some helpful advice looking
to buy my first bimmer tomrrow got into a car accident a
few weeks ago and insurance is taking forever to settle so
in the mean time I'm lookin at a 528i its a 99 with 133k
miles talked him down to 1,500 he said the car runs great
only problem is all the windows don't work I've replaced
window regulators before that's not a problem I got him
down really cheap cuz of it but there's also this 740il with
160k miles he wants 1,900 but he's willing to negotiate
has m5 front bumper looks great and he said drives like
new I could really use some insight help here what do you
guys think I should do any feedback would be greatly
appriciate I'm so exited to own a bmw!!
aftter a long ride (highway 50-70km) with my car looses power (does not turn off)and requires between 5 to 15 min rest to continue
What would that be? It shakes a little bit when you turn but that's it can you help me?
It won't turn over it doesn't even click I have full power to my battery all lights come on and it doesn't start
When it goes to red it only stays there for a little bit, then goes back to halfway. Does anybody know what would cause this?
I replaced the stock radio system and put a aftermarket system in. Used some of the wire to power the radio, but others are taped off to the side. But after a few days, lights started messing up. When I turned the ignition over, the low beams came on and all the brake lights illuminated and stayed on. I have no turn signals, no hazards, no high beams, no fog lights, and no rear license plate light. The computer where the speedometer and gauges are don't work either.
I even changed the fuel line and the wire harness with the one the engine came with now it won't start at all
I'm hoping that it is a problem with the automatic settings for each driver. Problem is that the door switch is broken. Disconnect it to fix problem???
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