Lumbar retrofit ?

Alpineis · 02-07-2013, 03:13 PM

My '11 335is with heated dakota leather sport seats has power everything but no lumbar. I didn't think it would bug me, but it is.. Anyone heard of a retrofit for this ?

m_335d · 02-07-2013, 03:39 PM

I think it is possible but you need to buy OEM parts and run additional wires to the lumbar switch.

smallseafishie · 02-07-2013, 04:25 PM

You'll need the lordosis bag, the switch, and the wiring harness.

You can grab a junkyard seat for these parts.

Remove seat and the back cover. Install lordosis pad behind the spring mesh assembly. Run wiring harness down and tap it into the 12V supply (Big thick brown is negative and big thick Red is positive) of the mating harness. Use a dremel to punch out the cutout for the switch. Reinstall and you're done.

The hardest part of the whole thing is removing the plastic piece where the switch goes. Be patient and you'll be able to find all the correct releasing tabs.

Good luck

smallseafishie · 02-07-2013, 04:27 PM

Just as another word of advice, it doesn't matter if the donor seat is sports or standard. The lumbar support is the same between the two.

If you get the same type of seat, then the wiring harness would be a direct swap over.

Alpineis · 02-07-2013, 05:08 PM

Thanks for the info. I will search some pn's and pricing.

KidSupreme · 02-07-2013, 05:22 PM

I spoke with some at dealer (parts) said no fix! lol

02-07-2013, 03:13 PM	#1
Alpineis Private First Class 3 Rep 145 Posts Drives: 2011 335is & 550 MTech Join Date: Dec 2012 Location: Alabama iTrader: (1)	Lumbar retrofit ? My '11 335is with heated dakota leather sport seats has power everything but no lumbar. I didn't think it would bug me, but it is.. Anyone heard of a retrofit for this ?
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02-07-2013, 03:39 PM	#2
m_335d Banned 0 Rep 3 Posts Drives: fast diesel Join Date: Feb 2013 Location: universe iTrader: (0)	I think it is possible but you need to buy OEM parts and run additional wires to the lumbar switch.
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02-07-2013, 04:25 PM	#3
smallseafishie Colonel 109 Rep 2,017 Posts Drives: AW 07 e92 335i + AW 11 X5 35d Join Date: Jun 2007 Location: Atlanta GA iTrader: (13) Garage List 2007 E92 335i [0.00]	You'll need the lordosis bag, the switch, and the wiring harness. You can grab a junkyard seat for these parts. Remove seat and the back cover. Install lordosis pad behind the spring mesh assembly. Run wiring harness down and tap it into the 12V supply (Big thick brown is negative and big thick Red is positive) of the mating harness. Use a dremel to punch out the cutout for the switch. Reinstall and you're done. The hardest part of the whole thing is removing the plastic piece where the switch goes. Be patient and you'll be able to find all the correct releasing tabs. Good luck
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02-07-2013, 04:27 PM	#4
smallseafishie Colonel 109 Rep 2,017 Posts Drives: AW 07 e92 335i + AW 11 X5 35d Join Date: Jun 2007 Location: Atlanta GA iTrader: (13) Garage List 2007 E92 335i [0.00]	Just as another word of advice, it doesn't matter if the donor seat is sports or standard. The lumbar support is the same between the two. If you get the same type of seat, then the wiring harness would be a direct swap over.
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02-07-2013, 05:08 PM	#5
Alpineis Private First Class 3 Rep 145 Posts Drives: 2011 335is & 550 MTech Join Date: Dec 2012 Location: Alabama iTrader: (1)	Thanks for the info. I will search some pn's and pricing.
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02-07-2013, 05:22 PM	#6
KidSupreme First Lieutenant 31 Rep 380 Posts Drives: 11' 335i m sport Join Date: Sep 2011 Location: Lost Angeles iTrader: (0)	I spoke with some at dealer (parts) said no fix! lol
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