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      05-01-2011, 02:49 PM   #1
CobraMarty
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E92 Sport Seat Retrofit- Need Help

Here is my new project and I need help on the wiring.

I have a 2007 E92 with Standard manual non-heated seats. I bought and want to install 2008 E92 Sport seats with power adjustment and heater.

The actual bolt in is easy. I plug in my harness to the new seats and nothing works. No power to the seats. So what do I need to do to retrofit these seats into my car? New harness? New coding?
I have BMW harness #61122155580, is this what I need?
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      05-02-2011, 11:46 AM   #2
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Come on, Where are all the smart guys?
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      05-02-2011, 12:06 PM   #3
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try doing a search, i remember reading about this before - but i've been lurking for a long time so i don't remember how long ago + i'm too lazy to search for you.
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      05-02-2011, 01:00 PM   #4
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If your car came with manual seats, your seat harness does not include the power wires. You either have to retrofit the wiring harness (probably difficult), or tap into another 12v source (you can tap into the fuse box) and manually patch in those wires to the seat harness.
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      05-02-2011, 01:10 PM   #5
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That is exactally it, there is no power for the seat adjustments. The cable I have seems to be the right harness for the factory installed option. I just don't have the instructions to install it. ECS has the harness for $20. I have searched this site and google for any info and read what little there is on this. Now if I had a '07-'08 with factory installed sport seats to look at the harness that would maybe help.
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      05-02-2011, 02:38 PM   #6
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Look at the harness connector attached to the seat. you'll see all the wires that are required. red ones will indicate power. when you match it up to the body harness connector, you'll be able to see which ones are missing. From there, you should be able to figure out where to run power.

Though wiring in the heater may be tricky, since the seat heaters are controlled by buttons on the dash. Did you get the additional controller/dash plate required for the seat heaters?
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      05-02-2011, 02:44 PM   #7
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At this point if I can get the motor adjustments working would be great. I will look closer to the connectors.

I don't have the heater dash switch or controller(didn't even know there is a controller). Do you have any part numbers for the heated pieces?
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      05-02-2011, 03:31 PM   #8
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Quote:
Originally Posted by Kylekuu View Post
try doing a search, i remember reading about this before - but i've been lurking for a long time so i don't remember how long ago + i'm too lazy to search for you.
After all the info he's already given to ask for help, you're just gonna tell him to do a search? If you got nothing helpful or kind to say, don't say anything at all. Fucking moron.
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      05-02-2011, 04:19 PM   #9
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Quote:
Originally Posted by Wild Squid View Post
After all the info he's already given to ask for help, you're just gonna tell him to do a search? If you got nothing helpful or kind to say, don't say anything at all. Fucking moron.
cuz there has been a DIY about this exact topic before. fucking moron. http://www.e90post.com/forums/showth...ght=sport+seat

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      05-02-2011, 05:13 PM   #10
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Quote:
Originally Posted by Wild Squid View Post
After all the info he's already given to ask for help, you're just gonna tell him to do a search? If you got nothing helpful or kind to say, don't say anything at all. Fucking moron.
wow, you must be new too - maybe you should do a search too

"try doing a search, i remember reading about this before"..guess it's not helpful to direct him to do a search

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      05-02-2011, 08:39 PM   #11
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Gee thanks, I did search and read those threads and they were only marginally helpful and not really clear. Neither solved the problem. One hacked and ran 2 new 12v+ to each seat, and the other jumped across one pin to another. This is not how BMW would have done it. I am looking for the right way to do it to get the seats working, including memory and heat.
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      05-04-2011, 07:40 AM   #12
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WOW what a project. I read closely the only 2 threads about this.

So I have stock basic seats and when I checked the connectors there are no wires for the seats only seat belt and air bag wires on the drivers seat and the seat occupancy, seat belt and air bag on the passenger seat. So to make these new electric adj. sport seats work I need to run 5 wires to the seats- constant 12v+, ground, K_Com1, K_com2, switched 12v+. The wires are already there for the seat belt and air bag. I will make a new harness and add it to the car and plug the wires into the plug -factory style. I should have everything even memmory but I will not have heat as I don't have the heater dash panel or control box. I will connect the wires temporally to a battery and adj. the seats and then disconnect the battery and later find how and where to attach the wires to the fuse box. Another weekend project.
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