Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E85 / E86 Z4 (2003-2008)

E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

Thread Tools Display Modes
Old 10-07-2012, 11:34 AM
goeslikeschnell goeslikeschnell is offline
Registered User
Location: San Jose, CA
Join Date: Jun 2012
Posts: 25
Mein Auto: 2006 Z4 3.0si roadster
Post E85 Z4 3.0si bluetooth pairing button DIY

This is a DIY on how to make your own pairing button for a BMW bluetooth module. This is specific to the E85 Z4, but should work for other models with slight changes for which wire to connect to. There is a plethora of information about E46 models and this borrows from that.

The gist is that you need to connect pin 1 and GND on the 18 pin connector.

Install instructions for the ULF module can be found here: http://www.bimmernav.com/BMW_Z4_Blue...tructions.html

Since BMW discontinued the E46 bluetooth pairing button you now have to DIY it yourself, or spend $170 on their button. DIY it is!

The connection is located behind the passenger seat speaker grill. You can see that it's mounted, give it about a half turn clockwise and it should come loose.

Click image for larger version

Name:	IMG_0109 copy.jpg
Views:	246
Size:	149.0 KB
ID:	344672

Click image for larger version

Name:	IMG_0120 copy.jpg
Views:	219
Size:	145.0 KB
ID:	344673

I bought a push button from Radioshack for about $3 in black to match with my interior. It seems that they only had bright red or black. I then soldered some speaker wire to the two connections and wrapped with tape.

The button required a 1/2 inch hole. Here it is mounted behind the passenger seat.

Click image for larger version

Name:	IMG_0123 copy.jpg
Views:	203
Size:	128.3 KB
ID:	344674

Click image for larger version

Name:	IMG_0125 copy.jpg
Views:	188
Size:	158.8 KB
ID:	344675

Next task is to find the activation wire for the bluetooth in the connection. You will have to pull off the outer cover to get to the wires. Based on the research it seems that the cable is pin 32 on the ULF connector but is a different color in the cars cabin. Here it's Yellow & Red. This is the wire removed from the connector. In the E85 it was pin 1 and GND. The easiest way to find it is to connect a wire to GND and then turn the key to position 1. Then touch each wire until you here bluetooth activate. The one that activated the system is the wire you need.

Click image for larger version

Name:	IMG_0127 copy.jpg
Views:	227
Size:	179.5 KB
ID:	344676

Click image for larger version

Name:	IMG_0128 copy.jpg
Views:	180
Size:	192.9 KB
ID:	344677

Here we are soldering pin 1 to one wire from the button.

Click image for larger version

Name:	IMG_0130 copy.jpg
Views:	177
Size:	146.3 KB
ID:	344679

Click image for larger version

Name:	IMG_0129 copy.jpg
Views:	174
Size:	138.7 KB
ID:	344678

Complete, just need to wrap with electrical tape.

Click image for larger version

Name:	IMG_0133 copy.jpg
Views:	159
Size:	154.4 KB
ID:	344680

The other wire from the button we connected and soldered a connector to attach under a screw for GND.

Click image for larger version

Name:	IMG_0134 copy.jpg
Views:	154
Size:	119.6 KB
ID:	344681

Click image for larger version

Name:	IMG_0135 copy.jpg
Views:	154
Size:	108.4 KB
ID:	344682

Then loosen a screw and tighten the GND connector under it.

Click image for larger version

Name:	IMG_0136 copy.jpg
Views:	248
Size:	160.9 KB
ID:	344683

And that's it! You now have a pairing button for about $5 and an hour of work.

Last edited by goeslikeschnell; 10-10-2012 at 10:31 AM.
Reply With Quote

See More Related BMW Stories

bluetooth, button, diy, pairing, z4

Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E85 / E86 Z4 (2003-2008)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

All times are GMT -7. The time now is 10:52 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms