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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 03-23-2013, 05:27 PM   #1
Jaystu
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323i won't start!!!

As I was driving earlier this evening I caught my front left wheel on a rock, this blew out my left tyre and subsequently and annoyingly two of my passenger airbags!!! (Which was completely unnecessary!!). The car now doesn't start off the key but will bump start (the battery light is on so there is no power from the alternator).

Is this a fuse or a fusible link??

I'm furious as there was no damage done to the car what so ever!! Only the wheel was damaged and now half of my interior is blown out due to the airbags (I can't hear in my left ear!) and the stupid thing will not start!

Please can somebody help!
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Old 03-23-2013, 06:06 PM   #2
joebox
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bmw side impact airbags are triggerhappy. Did the rock debris hit your alternator? it is low on the engine. check belt as well
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Old 03-23-2013, 06:21 PM   #3
montikme
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Go to your battery. On the positive terminal is a srs cable that blew.

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Old 03-23-2013, 06:22 PM   #4
Jaystu
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Very trigger happy!!! The rock literally caught the outside of the wheel, it pretty much killed the wheel but did no damage to the car itself so there is no way it could've got anywhere near the alternator, plus the car won't actually start from the key so the problem lies I'm guessing with some sort of accident failsafe fuse.
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Old 03-23-2013, 06:29 PM   #5
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Old 03-23-2013, 06:31 PM   #6
dmax
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see battery safety terminal in trunk behind the liner on battery side...realoem.com vehicle electric

But, I believe that the car won't start after an airbag deployment. I could be wrong, but I think you need to have the code cleared by something other than a peak reader...you need a 'real' computer program...see regional forum and ask for help there...and wait...someone will confirm or deny my guess.
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Old 03-23-2013, 06:33 PM   #7
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also i read that airbags trigger an explosion in the black box on top of the battery connection to break the power cable and cut high current down in a collision. Mine didn't when the airbags went off for no reason but i bought mine used. dont know if it was rigged by previous owner as the black box is not cheap
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Old 03-23-2013, 06:38 PM   #8
joebox
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mine started both after the right side blew and then months later when the left went. no reset and he already started his with jumper cables so probly just needs batt fuse thing
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Old 03-23-2013, 06:38 PM   #9
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Old 03-24-2013, 03:35 PM   #10
Jaystu
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As it turns out when an airbag is deployed there's a section of fusible cable inline with the positive cable from the battery that automatically blows as a failsafe. New cable ordered off eBay for 30.
A lot of drama for a burst tyre!!
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Old 03-26-2013, 03:30 PM   #11
Jaystu
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Just pushed the connection back into the black box, took 2 seconds and it's fine again. F**k sake!!!!
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