Replacement MULF Module? - BMW 3-Series (E90 E92) Forum

slc1978 · 11-22-2010, 06:12 AM

I need some help as the MULF Module in my E90 325i has blown up!! It is the one which has the MOST optic fibre connection so now nothing with audio in the car works...

I was wondering if anyone knows what parts are suitable as a replacement? I have done some research online but am a little confused as to which one will work... The old part number was 84.21 6-975173-02 and it is the MULF Module made by Visteon. Am I able to use a MULF2 part?

Any help would be GREATLY appreciated!

Thanks,
SLC

kmarei · 11-22-2010, 11:40 AM

MILF???

slc1978 · 11-22-2010, 03:39 PM

haha... no.

MULF it is the bluetooth module.

Anyone - it is driving me crazy!!

1QuikWS6 · 11-23-2010, 02:44 AM

Until you find a replacement you can re-arrange the fiber optic cables in the rear connectors to take the MULF out of the system and allow everything else to work...

slc1978 · 11-23-2010, 03:08 AM

That sounds great, any pointers on how i do that?

GenePoole · 11-23-2010, 10:23 AM

This is for a CD-changer retrofit, but I believe this is the same MOST connector you need to take the MULF out of the loop, but I don't know which one goes to the MULF:

http://www.e90post.com/forums/showthread.php?t=4194

I did the CD retrofit and it took two tries to get the fiber connections right. The document isn't very explanatory on how the loops works.

1QuikWS6 · 11-23-2010, 11:14 AM

That's ez to do! Remove the fiber optic cables from the MULF, shine a flashlight in the end you just removed, look for the light at the other end of the cable at the connector junction block behind the seat & voila! you have found the cable.

Just remove that cable, do same for other cable and arrange remaining cables in junction block to effectively remove the MULF from the loop...

jimk · 11-23-2010, 07:01 PM

I have a 2010 MULF2 available for sale. Let me know if you're interested.

Thanks,
Jim

slc1978 · 11-23-2010, 10:32 PM

Thanks Jim, will that work in my car as the original is just a MULF? If so pm me with a price please..

Quote:

Originally Posted by jimk

I have a 2010 MULF2 available for sale. Let me know if you're interested.

Thanks,
Jim

jimk · 11-23-2010, 11:28 PM

It should, it is very popular in Europe for just Bluetooth retrofits. It may even be plug and play without any coding needed but you may have to code it in order to function properly. If you know of an independent BMW garage with an Autologic programmer, it should be easy to program and fairly inexpensive.

MO3 · 01-08-2011, 04:07 AM

What have you done about your MULF MODULE?

I had the same problem. The MULF MODULE is $1200 for the part itself plus one hour labour to change!!

11-22-2010, 06:12 AM	#1
slc1978 New Member Drives: BMW 325i E90 Join Date: Aug 2010 Location: Canberra Posts: 21 iTrader: (0)	Replacement MULF Module? I need some help as the MULF Module in my E90 325i has blown up!! It is the one which has the MOST optic fibre connection so now nothing with audio in the car works... I was wondering if anyone knows what parts are suitable as a replacement? I have done some research online but am a little confused as to which one will work... The old part number was 84.21 6-975173-02 and it is the MULF Module made by Visteon. Am I able to use a MULF2 part? Any help would be GREATLY appreciated! Thanks, SLC
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11-23-2010, 02:44 AM	#4
1QuikWS6 No 55mph Drives: 09 E92 328ix Cpe Join Date: Jul 2009 Location: Blitzburgh, PA Posts: 3,181 iTrader: (68)	Until you find a replacement you can re-arrange the fiber optic cables in the rear connectors to take the MULF out of the system and allow everything else to work... __________________ 2009 328ix E92 Cpe//SGM//ACS Roof Spoiler//MTech Aero Lip+Trunk Spoiler//M3 Side Skirts//CF Roundels//CF Grilles//M3 Novillo Interior//Perf Shift Lever+Boot//M3 DCT Wheel//M3 GT3 eBrake Handle/Boot//ACS Pedals//M3 Mirrors//LCI Tailights//LUX H8v3 AE/MTec 6000K D1S/HPB HID 6000K Fogs//HPB LED Interior//RPI Scoops//CF Euro Airbox+Underhood Hsgs//K&N//MTech Rear Bumper/iS Sport Diffuser//MFD Strut Brace//PBX//BMW 193M's+Kumho 4X

11-23-2010, 11:14 AM	#7
1QuikWS6 No 55mph Drives: 09 E92 328ix Cpe Join Date: Jul 2009 Location: Blitzburgh, PA Posts: 3,181 iTrader: (68)	That's ez to do! Remove the fiber optic cables from the MULF, shine a flashlight in the end you just removed, look for the light at the other end of the cable at the connector junction block behind the seat & voila! you have found the cable. Just remove that cable, do same for other cable and arrange remaining cables in junction block to effectively remove the MULF from the loop... __________________ 2009 328ix E92 Cpe//SGM//ACS Roof Spoiler//MTech Aero Lip+Trunk Spoiler//M3 Side Skirts//CF Roundels//CF Grilles//M3 Novillo Interior//Perf Shift Lever+Boot//M3 DCT Wheel//M3 GT3 eBrake Handle/Boot//ACS Pedals//M3 Mirrors//LCI Tailights//LUX H8v3 AE/MTec 6000K D1S/HPB HID 6000K Fogs//HPB LED Interior//RPI Scoops//CF Euro Airbox+Underhood Hsgs//K&N//MTech Rear Bumper/iS Sport Diffuser//MFD Strut Brace//PBX//BMW 193M's+Kumho 4X

01-08-2011, 04:07 AM	#11
MO3 Captain Drives: 335i coupe Join Date: Nov 2010 Location: Sydney Posts: 618 iTrader: (4)	What have you done about your MULF MODULE? I had the same problem. The MULF MODULE is $1200 for the part itself plus one hour labour to change!! __________________ 2008 335i coupe \| Space Grey \| black leather \| poplar wood trim\| Hi-Fi Loudspeaker system \| Adaptive Headlights \| 35% 3M window tint \| GT-CX 19" \| Michelin PSS \| LUX H8 V3 \| OEM BMW Performance Black Kidney Grilles \| OEM BMW Performance gear selector \| M3 CF trunk lip \| M3 steering wheel + DCT paddles \| Cobb AP \| PTF ProTune E50 \| AR Design Catless DPs \| AMS FMIC \| ER CP \| Tial BOV \| BMS OCC \| AFE intake \| KW V2 coilovers

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11-22-2010, 11:40 AM	#2
kmarei Major General Drives: 1988 M3 Evo II Join Date: Jul 2008 Location: Reston, VA Posts: 6,070 iTrader: (32)	MILF???

11-22-2010, 03:39 PM	#3
slc1978 New Member Drives: BMW 325i E90 Join Date: Aug 2010 Location: Canberra Posts: 21 iTrader: (0)	haha... no. MULF it is the bluetooth module. Anyone - it is driving me crazy!!

11-23-2010, 03:08 AM	#5
slc1978 New Member Drives: BMW 325i E90 Join Date: Aug 2010 Location: Canberra Posts: 21 iTrader: (0)	That sounds great, any pointers on how i do that?

11-23-2010, 10:23 AM	#6
GenePoole Lieutenant Drives: '06 E90 330i Join Date: Apr 2010 Location: Brighton, IL Posts: 521 iTrader: (0)	This is for a CD-changer retrofit, but I believe this is the same MOST connector you need to take the MULF out of the loop, but I don't know which one goes to the MULF: http://www.e90post.com/forums/showthread.php?t=4194 I did the CD retrofit and it took two tries to get the fiber connections right. The document isn't very explanatory on how the loops works.

11-23-2010, 07:01 PM	#8
jimk Captain Drives: 2006 530i SP Join Date: Jun 2009 Location: 1961 Stout Street, Suite 1823, Denver CO 80294 Posts: 623 iTrader: (4)	I have a 2010 MULF2 available for sale. Let me know if you're interested. Thanks, Jim

11-23-2010, 11:28 PM	#10
jimk Captain Drives: 2006 530i SP Join Date: Jun 2009 Location: 1961 Stout Street, Suite 1823, Denver CO 80294 Posts: 623 iTrader: (4)	It should, it is very popular in Europe for just Bluetooth retrofits. It may even be plug and play without any coding needed but you may have to code it in order to function properly. If you know of an independent BMW garage with an Autologic programmer, it should be easy to program and fairly inexpensive.