DISCLAIMER: I am not a professional installer, I do not work for BMW or Becker or Harman Kardon, I make no profit and sell nothing to do with these things, these instructions are just my own experiences, mess with your wiring and electrical system at your own risk!

First, a few basic points- like WHAT are you installing?

• ALL Traffic Pro units work in all cars.
• US and Euro Traffic Pro units are NOT interchangeable
• Differences between the 4771 (BMW US version) and the 4773 (aftermarket version)
  • 4771- The 4771 unit is made to work with BMW's proprietary electronics as a BMW part - but BMW abandoned the project and it never came to the market. A few 4771 units were produced before the 4771 was abandoned. Some BMW owners were lucky enough to grab those abandoned units before they went to the trash bin. These install instructions are geared to those few BMW owners, but they are generally the same for the 4773 units, however, a 4771 is not a 4773, a 4773 is not a 4771.
    There is also a "Universal Adapter Cable" which Ron Stygar has thoroughly mapped. It will never support the BMW CD changer. If you can't get the right BMW adapter cable, the Universal Adapter Cable is your only shot.
    4771 units, the "BMW US Traffic Pro" units, match the BMW interior lights, work with the BMW CD Changer prewiring, BMW steering wheel volume controls, BMW Speed Sensitive Volume (SSV), and have the BMW "face".
  • 4773- BMW "faces" can be bought for the 4773 but they will never work with the BMW CD changer or steering wheel volume controls, they will never match the color of the rest of the 4773 lights (buttons), the "red" color is slightly different than the "BMW red". At the time of this writing, red 4773's are sold out and only "amber" 4773s are left.
• BMW US Traffic Pros work seamlessly with ALL BMWs, these install instructions happen to be on my Z3. What I know about the other BMW models I will add, all new information, corrections and additions are welcome!

Parts Needed:

OK, here we go: (I am guessing that smart people will disconnect their batteries before messing about with splicing wires. I didn't do my own install, the Becker folks did it for me and it all happened too fast for me to see.)

• Parts needed- really only a few things for the Z3 install:
  • 1- You need whatever it takes to remove your current head unit,. If that is the stock BMW unit, (the "Business CD" player) then you should use the special "star" tool to loosen the bolts. A hex wrench will strip the insides of the release nuts. Store the star tool with your stock radio, you won't be needing it any more.
  • 2-Whatever you do to splice wires, you will be doing that twice, once for the speed wire and once for the reverse lights wire. So uh, a needlenose pliers. You might use the BMW pins and some crimping tools.
    Ron Stygar wrote: I use the BMW pins shown in the following pic.
    
    When ordering have the parts guy lock the number so that it doesn't cede to the ones with the wire number.
    I crimp with long nose and solder.
    John Firestone just purchased some crimp tools.
    Or you can use this pin:
    
    Also from Ron Stygar's posts. If anyone knows which pin part number to use for the SSV and also for the Reverse lights, please email me and I will clean this up?
  • 3- Whatever you need to fish the antenna wire through the dash and to fish the reverse light wire to the reverse light plug. Like a wire hanger. (Non-Z3 cars who have trouble getting to their reverse lights can skip doing that one, it just lets Traffic Pro if you are backing up.) Z3 owners need only a flat head screwdriver to nudge the vents out of the dashboard and a phillips head screwdriver to take the screws out of the flap by the console. (Again, please email me if you can tell other models how to do this, I will add the info.)
  • The correct adapter cable from Traffic Pro to your BMW model. Non-BMW models have another harness altogether.
• Really, the parts needed are minimal- for a Z3 install anyway.
  Summary Parts List:
  • Star Removal Tool (stock head unit only)
  • Pliers/BMW pins and crimpers
  • Wire hanger
  • Flat Head Screwdriver
  • Phillips Head Screwdriver
  • Harman/Becker adapter cable
  • Magazine or clean paper

What's in the box?
• Since these are not really being sold, it may vary a little. I got some parts that will later be left out, but here's the entire contents:
• 
• These items on the right will not be used for the Z3 install and probably wont be in your box:
  
  • The Universal Traffic Pro Adapter is for non-BMW cars. BMW cars use one of two adapter harnesses with everything built in, plug and play.
  • There are wires with female RCA plugs for a non-BMW car with an aftermarket amp
  • In the bag here with the chrome keys is an antenna adapter and holder for the diversity antenna some BMWs use.
• These were in my package because this is one of the first units they sent out, remember this is not really an item for sale by BMW or Harman/Becker and the manuals are not written for BMW owners or the 4771 because again, this item was never really sold.
• This is the hardware you need to install a BMW US Traffic Pro (4771) in a Z3:
  
  For other BMW models you might use a different adapter cable, and you would use the diversity antenna adapter and you might need a trim kit if your stock radio is a different size.

Mounting

Traffic Pro is exactly the same size as the stock unit for the Z3:

• 
  Personally, I think the Traffic Pro is MUCH better looking, and MUCH more ergonomically designed for use in the car. General consensus is that the sound quality is also much improved over the stock unit. All the lower buttons and the knobs on either side are multi use buttons. e.g. when the radio is on, the lower buttons are your memorized stations.
  
  Note the different mounting device. Traffic Pro uses spring loaded clips and keys instead of screws to hold it in place. Don't lose your chrome keys! The chrome keys fit in the tiny slots under the two big knobs on the face of the Traffic Pro and release it from the console, they also place the Traffic Pro back into the console. You have to press the spring loaded levers on each side to release the keys before you shove it the last inch into place.
  

Plug it in
The back of the units are much the same but just a little different in the area of the connectors, which is why you need an adapter cable. (For Z3s the adapter cable is p/n 139.624 with a gray tag.)

One end of the adapter cable mimics the stock unit plug perfectly, both the head unit and the CD changer plug if you are using it.

The other end of the adapter cable fits the Traffic Pro plugs perfectly.

The GPS antenna will plug in in the corner

The GPS antenna plug has flat sides to fit into the slot on the Traffic Pro

Anti Theft- the Finger in the Hole
Unscrew the bullet-shaped head from your stock unit and screw it onto the back of your Traffic Pro. (My car had a bullet with the screw seated in it, in that case, you can unscrew the protruding screw from the traffice pro and screw the seated screw into the Traffic Pro.)

You will be carefully sticking this protruding finger into the anti-theft trigger mechanism behind the console when you are done connecting all the wires.

(Picture of the trigger mechanism coming, it's basically a plastic piece with a hole in it, and another plastic piece spring loaded with a "trigger". ) If someone steals your head unit, it pulls the "finger" out and the trigger is released setting off your theft alarm. Even if you don't have an alarm, you have this trigger. It's a little pita, but you have to do it. In the Z3 you can cheat by carefully opening the flap on the passenger side of the console and reaching behind the head unit to guide the finger into the hole.

Be careful as the flap opens, it scratches the glovebox as it slides by. Use a magazine or something to let the flap slide by without rubbing the glove box.

Wiring
So now you know how to plug everything in except the two wires that are hanging out of the adapter cable. They are:

• Black and White= Speed
• Turquoise and Chatreuse=Reverse

(Folks I know I am weak on these two wires, any help would be appreciated, proper terminology, part numbers, pics...)
Wiring colors match the same wires in the BMW.
Your job is to splice these two wires appropriately - or use the pins I described in the Parts Needed section.
You must connect to the Speed Sensitive Volume (SSV) wire for the Traffic Pro to function, it is located behind the head unit in the console.
Many people use Traffic Pro without hooking up the reverse lights- this only lets Traffic Pro know when you are going backwards to give you better directions. Mine is hooked up. In some cars the reverse wire is impossible to reach. The connector for the reverse lights in the Z3 is easy to reach, it is under the gear shift boot, here is the pinout:


GPS Antenna placement and routing the GPS Antenna Wire
Place the GPS antenna in the middle of your dashboard down where it meets the windshield (I guess coupes could mount it on the roof?).

Run the GPS wire along the windshield to the passenger side A pillar. Then you can use the same procedure outlined in the Book Of Ungo to run the GPS antenna wire back to the head unit to plug it in.
Basically that means you pull out the side and center vents (some Z3 vents also have a screw, mine just pulled right out easily)


Drop the wire down behind the corner of the dash by the A pillar into the side vent- as the blue demonstration wire is here:

Again follow the blue demonstration wire to get from the passenger side of the dash ....

...to the center vent

And here the orange demonstration wire shows you how you can reach up under the flap to grab the GPS antenna wire and plug into the back of the Traffic Pro.


After it's connected
With all the wires connected, use your chrome installation keys to align the Trafic Pro, carefully guiding it's finger into the antitheft trigger mechanism. Press on the spring loaded levers on either side of the Traffic Pro to release the keys, push it gently into place.

Now you can follow the directions in the manual to calibrate and install your mapping software, pick a voice for your Traffic Pro and set off on any adventure. Welcome to the wonderful world of Traffic Pro, where you never have to write down directions again. Make sure you pick up some maps anyway, Traffic Pro isn't meant to obsolete maps, it just makes everything so... much... easier.

Please join the BMW US Traffic Pro Users Group and share your tips and tricks with the rest of us!