If you can catch it failing again, test for power on the small wire going to the starter solenoid while someone tries to crank it. If you have no power, check for power at starter relay and trace backwards. If you have power, you have a bad starter. They can have intermittent failures. Hopefully your starter is easy to access, some 3 series and 5 series have the starter mounted under the intake manifold and it is necessary to removed the maifold to replace or test the starter. Good luck, hope this helps.
I think you should make a diagnostic, and i
know a good tool named [url="http://www.xcardiag.com/wholesale/super-bmw-ops-dis-v57-sss-v41-diagnose-and-programming-tool-fit-ibm-t30-11.html"]Super BMW OPS DIS V57 SSS V41 Diagnose and Programming Tool Fit IBM T30 [/url] my friend have one , i think it can help
you
SOURCE: bmw 1 series wont start
my bm 1series came to a shudder a code came up p0012 got the actuator cam. from main dealer fixed still wont start
SOURCE: 1998 bmw 740il will not start even with new a battery
If you checked all the fuses try putting the car in neutral sometimes the shifter gets misadjusted and wont start till the car is completely in park.If not check for a lose wire to the starter.If the car has an after market alarm you will have to turn it off before starting there should be a little buuton under the drivers dash or kick panel.GOOD LUCK
SOURCE: my BMW 325CI will not start. The engine doesn't even turn overl
i changed the notor on my 2001 bmw 325ci and now the car wont start. the check engine light does not come on at all
SOURCE: 1996 bmw 3 series 318i ignition wont start
could be a problem with the security chip in the key.
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