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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 12-22-2010, 03:48 AM   #1 (permalink)
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'99 E46 SRS light on, cores read

hi,

i bought my car with the SRS light on. I checked today with a snap-on universal code scanner and I got these codes:

- internal ECU error
- left and right igniter circuits (seat belt tensioners)

when I tried to erase the codes i got "codes erasing failure".

I was thinking to start by purchasing the ECU. is the SRS ECU part # 270651893824 on ebay? because on realoem I can find no SRS ECU in the diagrams.

Where is the SRS Ecu positioned in car?

Thanks
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Old 12-22-2010, 08:56 PM   #2 (permalink)
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Before starting investing in expensive parts.Change first ignition switch(around $70.00 or less original part on line-rockauto.com), then reset fault codes with good air bag code reader for BMW cars.Hope it help.Let me know.
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Old 12-22-2010, 10:47 PM   #3 (permalink)
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Originally Posted by zibby View Post
Before starting investing in expensive parts.Change first ignition switch(around $70.00 or less original part on line-rockauto.com), then reset fault codes with good air bag code reader for BMW cars.Hope it help.Let me know.
are you talking about the part located under the central armrest?
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Old 12-23-2010, 10:20 PM   #4 (permalink)
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Ignition switch! Inside steering wheel column.Behind your key barell(where you insert car key).Access from the top of steering wheel column.Search "youtube" how to do it
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Old 12-24-2010, 01:57 AM   #5 (permalink)
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ok, now I understand, I was thinking at the igniter switch

so how could the ignition switch cause those errors that I am reading to show up and not be erasable?
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Old 12-24-2010, 08:39 PM   #6 (permalink)
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ok, now I understand, I was thinking at the igniter switch

so how could the ignition switch cause those errors that I am reading to show up and not be erasable?
When ignition switch starts failing.funny things also start happening(some dashboard lights with no reason light up during driving,car does not starts right away when you switch ignition on or starting is dalayed few seconds with no dashboard lights at all for a moment.That was my case.Changed switch ,reset air bag light no problem any more.Dealership wanted $700.00 for some rewireing according to them should cure the problem my air bag light.Thanks God did not go for that.Took me 20 minutes to change it.It is "plug and play".

Merry Christmas.
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