BMW Repair Questions? Ask a Mechanic for Answers ASAP
It sounds like you have a few different things going on. I think they are coincidental, and not due to the new fuel pump.
The idrive sounds like a software issue. The one thing you can try to do to reset this is unhook the negative battey terminal for one hour (do this will the keys out, car off, doors open and windows down). This reset procedure can often clear out random issues like what you have with the idrive.
For the brake and triangle light, this indicates that your ABS and traction systems are not working at the moment. This is normally caused by a faulty wheel speed sensor but in a worst case scenario could also be a failed abs/traction module. The ABS system is what sends the speed info to your speedo, so that is why the speedo is not working.
The power steering indicates that your fluid might be low, or that the pump is on its last legs.
For the check engine light, you will need to have the codes read by a BMW compatible scan tool to determine what the cause of this light is. There are well over 100 reasons it could come on, so it is not productive to speculate.
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In that case, it could be a problem with your alternator. When alternators start to over or under charge, the fluctuating voltages can cause symptoms like what you are experiencing. I suggest you have the alternator checked.
The other thing to check is the battery connections. Aside from that, there is nothing of high probability that would cause what you are experiencing.
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BMW does not make batteries, so any battery would have to be "aftermarket"
This is not your problem.
Now, the trip reload button will not help you, that is totally unrellated to what you are experiencing.
I suspect the atlernator based on what you have told me.
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i will try resetting system again! where can i get the alternator checked?
Any shop should be able to do this for you. You might be well served to have it done at a BMW dealer though, the test equipment at BMW is able to read the car's information to a much more granular level than the equipment at independent shops, so they are often able to figure out odd problems a lot easier than other shops.
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sorry, you're going to do what?
Unfortunately there is nothing you can do at home to fix your issue.
You need to a) have the alternator checked and b) have the car put on a BMW test machine at the dealer so that they can determine what is going on with your idrive. There is no way to troubleshoot the idrive or update it without dealer software.
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Again, I am sorry, but this is not a problem that you can solve without BMW dealer equipment. I cannot provide any further instructions for you to help you determine the issue. Expensive, special equipment is required in cases like this.
I have taken the time to explain as much about what might be going on with your car to you as possible, and answered every one of your questions. It is impossible to say for sure what is going on without a BMW test machine diagnosis.
I have done my best to assist/explain and I hope you will accept my answer so that receive credit for my time and effort.