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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > removing seats to replace subs



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      06-21-2012, 07:26 AM   #1
goldfinger1
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removing seats to replace subs

I need to replace the subs in my 2007 328 conv. Seats have to be removed. Any issue with airbags or any other electronics?
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      06-21-2012, 08:24 AM   #2
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From what I understand only if you disconnect the wiring on the seat. You don't have to do that. I just did this last night. Didn't unplug the seats and no lights when I started the car. Move the seat back and undo the front bolts then slide the seat as far forward as possible and undo the rear bolts. Now just tip the seat back. I used the rear seat belt wrapped around the head rest to hold the seat back.

If for some reason you want to remove the seat completely make sure to disconnect the battery first. From what I hear that's how you avoid the warning lights and the follow up coding. Haven't had to do it so I can't vouch for that.
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      06-21-2012, 09:11 AM   #3
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Unbolt the seats and tilt them towards the rear seats. No need to unplug them.

Just make sure that you do not turn the ignition on while the seats are unbolted. Sometimes the airbag error light will show up even when the seats are not unplugged but unbolted if the ignition is turned on.
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      06-21-2012, 10:06 AM   #4
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What Technic said.

Move your seats all the way to the front, remove rear bolts. Then move your seat all the way back towards the rear and remove the front bolts. I don't remember but the Torx size was either a T40 or a T50. It's just 4 bolts total. Torque them down to like 25-26nM after you put them back.

Because I tilted my seats instead, there was no need for me to unplug the sensor.

If you MUST unplug the sensor, do disconnect the battery first, then unplug the sensor. When all done, plug the sensor in then reconnect the battery
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      06-22-2012, 12:35 AM   #5
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I've disconnected the harness without disconnecting the battery. I did manage get an error when I turned on the ignition without having reconnected first. The error was easily reset with INPA though.
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      06-22-2012, 12:59 AM   #6
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I have some pictures in my install procedure

http://www.e90post.com/forums/showthread.php?t=641323

Look in the Hi Fi entry for Ctuna Musicar install it also tells you how to remove an reinstall the door sill which you need to do to get the carpet
up a bit.
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      06-22-2012, 06:31 AM   #7
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T50 screw and follow what technics mentioned.
Installed custom sound system yesterday.
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      06-23-2012, 09:12 AM   #8
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I actually prefer to have the seat as far forward on the rails, which is why I do the rear bolts last. It actually lets you tilt the rear seat back farther and gives you more room. Visualize it and you'll see that it makes sense.

I actually took the seats out completely last night. Unplugged the battery and then I unplugged both seats. Reinstalled the seats, plugged in the battery, fired up the car and no warning lights whatsoever.

Jim
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      08-05-2013, 05:47 AM   #9
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did you reuse the old seat bolts or use new ones..heard that they are a one time use bolt but not sure if this is correct..
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      08-05-2013, 09:28 AM   #10
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Quote:
Originally Posted by jimbowats View Post
did you reuse the old seat bolts or use new ones..heard that they are a one time use bolt but not sure if this is correct..
I've already taken my seats out a few times and I just reused the bolts. AFAIK the only 1 time use bolts are the aluminum bolts on the engine that have a blue dot on them.
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