2004 745I starting issues

Hi guys,

Got a questions for anybody that can give me some input, highly appreciated.
I have a 04 745 I , with 149,000 miles, bought it with 65k a few years back and been doing my own maintanance on her since.

A little background:
So my starters been acting up for the last 6 months, several times a month i would try to start and would get nothing (no cranking), just a single click sound that seemed to be comming from the glovebox. after several attemps of removing key she would fire up normally, so I assummed the starter was just getting stuck. This past Friday I get in the car after work crank her up she starts right up then dies after 5 seconds WTF, crank her again she starts up and dies after a few seconds. I try a third time and now she just wont fire up (she cranks just wont turn over.

I asked around and was told to check the pressure on the fuel rail, whitch I did and im getting like 2.89 bar when i try to crank, then I remove the key and like 30 seconds later the gage spikes to 3.5 bar then back down to 2.89

Fuel pump?

Power module?

crank sensor?

Any help or ideas will be highly appreciated.
Thanks

check your fuel pump, remove back sit, disconnect pump and put wire from spare battery to pump. I think purple and brown (ground ) wires

I got 4 wires going to the pump , 2 thick wires: brown w/yellow stripe and purple w/black stripe. Then I got 2 skiny wires that look black.

so which one do I connet the battery (+) lead to

I have the same yr and had the same problem. Id park go inside a store come out and car would click 1s then nothing. After much reserch i replaced the integrated power supply and ive had a year of no worrys!

yea fuel pump is a diffrent issue from what your explaining

eighter your starter is no good or like ^he said integrated supply module which controls the power going to the starter

Thanks alot guys for your sugestions

try that again.

Thanks allot guys for your suggestions/reply's,

I guess its not too bad like $130, i'm going to try that because she's been out of commission for two weeks!!

Cross my fingers, keep you guys posted.....

Hi there 745i4k I'm having the same problem you had with your ride I got a 2004 745li with 143,000 and would like to know if replacing the integrated power supply module worked for you. Thanks in advanced

I have a 2004 BMW 745i. and exited the code p0491 and it will change the air pump and return the code, help: Cry:

Well guys she's still sitting in my drive way,
Ordered a new integrated power supply and still no start-up

did you ever check the starter like i was saying ?

Try tapping the starter with a broom handle. It's at the back, bottom of the engine on the passenger side.

did you ever get this fixed I'm having the same issue. Thanks