My 2004 BMW 525i won't start (no clicking, slight humm)

Question edited for clarity.
Question moved to model category.

Help and videos in the link. Sometimes you can get into the trunk from the back seat and pull the emergency handle.

https://www.google.com/search?q=2007+bmw+525i+trunk+won%27t+open

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bmw z4 alternator - forum about car parts and car advices ...

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bmw z4 alternator help cracked alternator upper mount 2003 z4 head light ... Before putting my car in storage a few months ago my old battery was nearly dead I needed to... in a Z4) but the same big yellow battery light is still on my dash appearing for .... Hi guys I own a 2005 Z4 2.5i Auto and there is a weird whining sound.

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www.bimmerfest.com > ... > X Series > X3 E83 (2004 - 2010)

Aug 30, 2013 - 13 posts - ‎6 authors
OK, long story but here it goes (hopefully the length will help with ... I hook the jumpstarter up to the battery, let it sit 1-2 minutes, then ... The AZ rep. tells me that my battery is at 9V and this is why my car .... Mein Auto: 2004 X3 2.5i ... If battery is original (2005) it is more than likely one cell has shorted out. Z4 starter motor and related problems.
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forum.roadfly.com > ... > BMW Z4 Roadster & M Roadster (E85)

Mar 5, 2008 - 20 posts - ‎6 authors
I could not start my Z this morning after not driving it for the past 4 days because of the weather. All lights come on the dash including the head lights but it won't crank. ... If the starter is not cranking because of the battery being too drained .... BMW Z4 2.5i started slow and finally would make a clicking noise.

Z4M Engine Sputters/Misfires - Bimmerforums

I believe you gain access to it by removing the rear seat then a cover plate in the flooring. Hope this helps.

Why was the battery missing to begin with? I would start by checking all fuses under dash and Central hub. Check for burned in-line fuses,if any, coming off of battery cables.

airbag light on means some DTCs stored in your airbag,
so you should get a airbag reset tool to do your car,meybe B800 BMW airbag reset tool can do your car.

It takes a special computer reset with special tool.most tune shops and bmw dealerships have them.

make explosion..not good. car not stay on with exploding all the time. replace cylinder head with new one. old one cracked now

It is very important that the engine not overheat! The head can crack and this would be very bad.
I think your car is too new to need a new radiator.
Make sure the coolant level is correct.
Check the thermostat housing for leaks.
When the engine is hot, check if the fan clutch is locked up and actually driving the fan. Turn the engine off and grab the fan and try to turn it. It should turn stiffly. If it spins freely the fan clutch is dead.
It is possible that the water pump impeller has failed, especially if it is a plastic one.

My car starts fine. Goes into reverse drive but starts off in 3rd so if anyone knows whats going on here let me no my e-mail is [email protected] also my dash displays break light circuit.