Combox retrofit in 2009 m3

svinfinity · 01-05-2016, 06:34 PM

Got a few questions before i start my retrofit.

How do i know if i have a TCU or MULF or both?

Where can i get a proper retrofit harness?

wildcatcrazy · 01-05-2016, 08:28 PM

Quote:

Originally Posted by svinfinity

Got a few questions before i start my retrofit.

How do i know if i have a TCU or MULF or both?

Where can i get a proper retrofit harness?

Look in the trunk, right behind the backseat. The TCU and/or MULF is bolted in on the right side under the trunk mat.

svinfinity · 01-06-2016, 07:25 AM

Thanks. What about getting a plug n play harness?

wildcatcrazy · 01-06-2016, 10:07 PM

Quote:

Originally Posted by svinfinity

Thanks. What about getting a plug n play harness?

@glachhman2 used to sell them, but I think he's no longer providing them. There some members who've had success just modifying their current connectors (pin out). Just google bmw combox pinout.

dbworld4k · 01-20-2016, 06:16 PM

The pinout method is so easy you don't need a harness. Did it on two cars, it's a cake-walk.

01-05-2016, 06:34 PM	#1
svinfinity First Lieutenant 57 Rep 383 Posts Drives: E92 JEREZ M3 Join Date: Mar 2015 Location: Fort lee nj iTrader: (0)	Combox retrofit in 2009 m3 Got a few questions before i start my retrofit. How do i know if i have a TCU or MULF or both? Where can i get a proper retrofit harness?
	Appreciate 0 Tweet Quote

01-06-2016, 07:25 AM	#3
svinfinity First Lieutenant 57 Rep 383 Posts Drives: E92 JEREZ M3 Join Date: Mar 2015 Location: Fort lee nj iTrader: (0)	Thanks. What about getting a plug n play harness?
	Appreciate 0 Quote

01-20-2016, 06:16 PM	#5
dbworld4k Banned 583 Rep 2,233 Posts Drives: '12 M3 Join Date: Mar 2008 Location: YYZ iTrader: (5) Garage List 2002 BMW M5 [10.00] 2009 BMW 335i [10.00]	The pinout method is so easy you don't need a harness. Did it on two cars, it's a cake-walk.
	Appreciate 0 Quote