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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 05-31-2008, 02:42 PM   #1 (permalink)
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Unhappy Help!!!

Just found out my air bag light went on due to a faulty occupancy sensor. Does anyone know how to fix this and if so any pics as to what I am looking for. What does it look like so I can purchase a new one....
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Old 05-31-2008, 09:39 PM   #2 (permalink)
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Forgot to mention its an e46 323i 1999... guess thats important.
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Old 05-31-2008, 10:08 PM   #3 (permalink)
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how'd u find that out(to start with).... code reader???

it could be just a disconnected sensor. OR if it is indeed a faulty sensor. the only way is to replace the sensor.

If you are convinced that is the prob. order 1 from ur fave dealer and that gives u an iddea of what ua re looking for ;-)
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Old 06-01-2008, 03:16 AM   #4 (permalink)
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seat occ sensor is located in the seat bottom under the leather. you will have to disassemble the seat and remove the leather to replace it. if you want to see what it looks like go to realoem.com and look it up
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Old 06-01-2008, 08:44 AM   #5 (permalink)
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Yea It was scaned and thats the code it came up with... thx for the info i will look kit up. i have been told it is not an easy job...
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Old 06-01-2008, 09:31 AM   #6 (permalink)
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Still confused

Just checked out the site but saw there is 2 major pices to this sensor. There is the box that it plugs into located under the seat and the actual mat located under the leather. Which is most common to go and what do i change first.
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Old 06-01-2008, 10:32 AM   #7 (permalink)
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Lightbulb

it's the mat. usually goes bad from reckless cleaning of the floorboards with water/detegents or driving in floodwaters.

before u change, check for moisture first. if u suspect it's wet in some way, dry it out first. then clear the codes. It might just do the trick and save you the bucks and a whole lot of labor.

the computers in cars(ABS, DME, airbag) are just like your PC and/or laptop. sometimes, they have glitches, sometimes they freeze. REMEDY: REBOOT!
In many cases, a simple "disconnect your battery" and leave it disconnected overnight or as long as you can(i.e. REBOOT) will reset the computers into their original factory settings- no more problem!

GOODLUCK.
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Old 06-01-2008, 10:14 PM   #8 (permalink)
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Yea tried the battery thing but no luck... i was hopping you would say the box under the seat though as that is the easy one to get at.. the mat is under the leather and is a big job.. oh well. As for it being damp i dont thimnk its that simple as this code came up when i hit a huge pot hole....
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Old 06-01-2008, 10:19 PM   #9 (permalink)
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"when it hit a huge pothole".... that tells me a connector just may have separated ;-)
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