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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 03-21-2010, 03:10 PM
omrodez omrodez is offline
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Exclamation BMW X3 Wont start! HELP!!!!

OK so this is the situation and I'm in desperate help now. I have 2005 BMW X3 that has blown airbags due to a minor wreck (Right headlight and fender). The engine doesnt turn over all I hear is a click. I replaced the battery because it wasnt charging. A mechanic (not BMW certified) told me it could be the starter, so i took off the starter (it was hell) and checked it but it was fine. So the next thing i did was diagnose it and got all these codes; P0171-System to Lean Bank1 , P0174-System to Lean Bank 2, P0306-cylinder 6 misfire, P0300-Random/multiple cylinder misfire, P0302-Cylinder 2 misfire, P0303-Cylinder 3 misfire, P0440-Evap. control system malfunction. Can someone tell me what could be the problem?

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  #2  
Old 03-21-2010, 05:12 PM
BMW1223 BMW1223 is offline
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well if i were you i would delete those codes and then check if it will start and dude you have got lots of cylinder misfires. thats all i can say its not much but if you delete those codes then it might start because the codes were probably messing with the cars computer BTW IM NO EXPERT
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  #3  
Old 03-21-2010, 06:06 PM
Supercourse Supercourse is offline
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Have you considered the Battery Safety Terminal?

Not sure what really happens computer-wise when airbags are deployed, but some electrical systems get disabled by default.
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  #4  
Old 03-21-2010, 06:17 PM
omrodez omrodez is offline
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Battery Safety terminal? Im not sure what that is or where its located or what its purpose is. im assuming it acts like a fuse or some sort?
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  #5  
Old 03-21-2010, 06:18 PM
omrodez omrodez is offline
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i had already erased all the codes but they came back immediately but good advice!
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  #6  
Old 03-21-2010, 07:00 PM
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AzNMpower32 AzNMpower32 is offline
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All BMWs have a safety shutoff, noted as the Battery Safety Terminal when the airbags are deployed. A lot of electrical systems are disabled.
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  #7  
Old 03-21-2010, 07:07 PM
omrodez omrodez is offline
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What are some of the electrical systems that are disabled can lead me to fix this problem other than the BST?
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  #8  
Old 03-22-2010, 07:41 AM
UncleJ UncleJ is offline
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Not only BMW's have the safety switch. Virtually any modern car with an electric fuel pump has a "bump" switch that will shut off the fuel flow in the event of a crash, and it doesn't have to be an airbad deploying crash either.
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  #9  
Old 03-22-2010, 08:54 AM
omrodez omrodez is offline
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is there a way i can switch it back to ON? or do i have to buy the fuel pump?
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  #10  
Old 03-22-2010, 09:03 AM
UncleJ UncleJ is offline
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There is always a "switch" somewhere to reactivate it. You will have to check with a mech to find the one in the X3 as I don't believe it is shown in the owners manual. It has been some years since I had to reactivate one, my Alfa GTV6 would sometimes shut off when I hit a big super pothole but it was (like most Italian cars) "very sensitive".
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  #11  
Old 03-22-2010, 09:30 AM
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X3emist X3emist is offline
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You're gonna have to take it in

From listening to this discussion I think it is painfully obvious that you are gonna have to take it to a GOOD body shop or a BMW dealer to get it back on the road. You aren't gonna find a fix on this forum I don't believe. Not meaning to be negative but there are too many issues to be dealt with in your garage.
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  #12  
Old 03-22-2010, 11:06 AM
omrodez omrodez is offline
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Taking it to the BMW dealer IS the obvious choice and not to mention IS the right place to get raped in the ass! lol! But hopefully i'll find little details like these in this forum that will get me an idea of where the problem could be and HOPEFULLY fix it without taking it to a shop. I cant believe how sensitive these BMW's are!!! but hey at least it'll save someones ass in a serious collision right?
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  #13  
Old 03-22-2010, 11:40 AM
kenza kenza is offline
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There must be a way to check if you fuel pump is working. For example you could take off the fuel filter and confirm if there is fuel flow when you turn the key?
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  #14  
Old 03-22-2010, 04:31 PM
Supercourse Supercourse is offline
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Quote:
Originally Posted by omrodez View Post
is there a way i can switch it back to ON? or do i have to buy the fuel pump?
I think we have got off track on the fuel pump.

The engine is not even cranking, as I understand it.

Just clicking when the key is turned.

A replacement battery has been tried without any success.

And the starter has been bench tested as O.K.

That means that the starter is not getting 12V at all, or at least the large amps. it needs.

Other large draw items should be confirmed as working or not with the ignition on.
(e.g. things like the fuel pump whirring that you hear when key is turned to position II)

Not sure if the starter solenoid has been confirmed O.K. as well.

I would think that any body shop would know what to do as part of their everyday procedure.
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  #15  
Old 03-22-2010, 04:54 PM
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AzNMpower32 AzNMpower32 is offline
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Modern BMWs are incredibly complex and not terribly user-friendly to most mechanics unless they specialise in them and have the expensive computer equipment on hand. There are sometimes when you just have to accept given limitations.

Shouldn't insurance be able to cover the bill?
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  #16  
Old 03-22-2010, 07:48 PM
omrodez omrodez is offline
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ok so this is the latest situation. I LOVE YOU ALL!!! THANK YOU FOR YOUR HELP!!!!!
SUPERCOURSE was right i mean how can it be the fuel pump if the engine doesnt even crank, so theres no way to even check the fuel pump. Anyway, I checked that BST and sure enough it was popped out of its place. So i but the BST back together and VOILA! the engine started without any hesitations. So now my next step is to take the BST to a friend i know in JUAREZ, MEXICO who can fix it for cheap and done real well...i just hope i dont get shot hahaha!
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  #17  
Old 03-23-2010, 06:41 AM
thayerV thayerV is offline
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The battery safety terminal cannot be reset it has to be replaced:

Quote:
Battery Safety Terminal
The battery safety terminal (BST) will avoid short-circuiting of the high amperage starter circuit in an event of a collision. BST is actuated by the air bag control unit and uses a pyrotechnic charge to separate the starter cable from the battery in a crash.
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