2004 530i bmw turn over but wont start doing fine I let it running took key out than it wouldnt start

If the vehicle is equipped with a timing belt, make sure it hasn't jumped throwing the valve timing off.

> the key would not turn in the door-lock

Are you sure that you are using the correct key?
Did you recently separate/divorce from your partner/spouse?
Did the ex-spouse have the car "rekeyed", so that the "old" keys no longer work?

Did you recharge or replace the dead battery?

Disconnect the battery, have the ignition key turned to the "on" position then reconnect the battery.

firstly try with the spare key, sometimes they become uncoded. Then if you have a voltmeter check the battery to make sure there is still a good level of power in it before getting the started motor cheked.

could be a problem with the security chip in the key.

Check fuse # 46 and break lights bulbs
they are on same circuit as the Ignition switch on 1995 318 it maybe the same for yours

Sounds like an antitheft problem I would start with the antitheft system. Usually when you only have one key all keys have to be programmed together even the original. When you have more than one it is easy to program additional keys.

ya the fuel pump wont pump with the lines off but the pump is going bad they will work and wont work

Check Your Battery, o perhaps You have a power leak, The way to do that is, with the car off key out take one of the battery terminals off than on the battery nipple connection put the end of a test light, and on the terminal that You have remove the other end of the test light, if light comes on You have a power leak, to find in which circuit leaks live test light connected to both, battery and removed terminal start taking fuses on and off till lights on test light goes off, and when that happen, that's the fuse where the power leak is located

DME relay is faulty, its seperate from the ecu and was most likely fried when the ecu went........did anyone try to run an on board diagnostic code pull?