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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > DIY: Partial Retrofit of e90 LCI Seats onto e90 Pre-LCI Vehicle

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      01-11-2011, 05:29 AM   #1
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Drives: Jet Black e90 335i
Join Date: Jul 2007
Location: Claremont, CA

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DIY: Partial Retrofit of e90 LCI Seats onto e90 Pre-LCI Vehicle

If you have a pre-lci e90 and want lci powered seats, you may find this guide helpful.--If you've swapped your pre-lci powered seats with lci powered seats, you may notice that it was not just a simple swap/plug-n-play: your driver's side seat will likely have functionality yet the passenger side will be completely powerless. This guide will resolve that issue.

Special thanks
  • to Lemon for providing me with the opportunity to disassemble his precious LCI e90 and use it as a reference. Also thanks for help with installation. Thanks brotha I know how much your e90 means to you. =]
  • to Lorenzo for helping out with seat transport and installation.
Thanks guys, you two should really join the forums. It's a great community.

After I swapped my 2007 base powered seats with 2009 sport seats, my driver's side has basic functionality, but my passenger side was powerless.

In the end, it came down to moving one goddang wire.

  1. Obtain a set of LCI seats.
  2. Unplug battery in trunk of your car. Keep your trunk open and all doors unlocked prior to unplugging battery.
    Needed: 10mm.
  3. Disconnect yellow command module from under seat. If you've installed a PROcede this will be familiar.
    Needed: Flathead
  4. Unhinge seatbelt. Stick flathead in...wiggle around side piece and it will come out. Use T-50 to unscrew.
    Needed: Small Flathead
    Needed: T-50
  5. Take out seats. 4 Bolts.
    Needed: T-50
  6. Replace seats.
    Needed: One very strong person. Best if you have a friend or you will have trouble placing seat in car without scratching door.
  7. Take a look at yellow harness. Take out harness. If you've installed PROcede this will be easy.
    Needed: Small Flathead
  8. Use small flathead to remove pin and place in spot as show in picture below. (click for supersize)
    Needed: Small Flathead
  9. Put yellow harness back together.
  10. Plug harness in.
  11. Ignore white plug if you don't have a slot.
  12. Bolt those 4 T-50s back in securely.
  13. Reconnect battery.
  14. Test seats.
  15. Securely Fasten 10mm on battery.
  16. ???
  17. Powered Seats!

Last edited by AoshichanX; 01-29-2011 at 12:07 AM.
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      12-26-2011, 09:06 AM   #2
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Drives: 335i
Join Date: Dec 2011
Location: United Kingdom

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hey were both of your seats heated?
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