The Dynavin head unit for the E46 is an awesome upgrade for any 3-series owner. The added functionality of navigation, bluetooth, MP3, and DVD is a must for the enthusiast. However, if your car already had the OEM navigation system, the process is a lot more complicated than the standard install. Most people will use a FAKRA 5M harness that moves the connections that are in the trunk of the navigation wired 3-series to the dash where the basic radio systems have them. Even this harness requires some modifications to work properly. Also, if you have an aftermarket amplifier, the Fakra harness is an added hindrance.
The E46 coupe I purchased was originally equipped with the Harmon Kardon stereo system and the OEM navigation system. However, the first owner (I am the third) had removed the OEM navigation, subwoofers, and amplifier to install their own aftermarket system. Unfortunately, it was removed by the time the second owner purchased it. Fortunately, all the harnesses were relatively intact, and the A/C box was not modified for a double DIN unit. I decided I needed to add a new 5-channel amplifier, 10″ subwoofer, and a Dynavin head unit.
The first problem for me was getting the Dynavin head unit wired into the car. I spliced into the blue harness behind the dash. Here is the blue harness with the blue shell removed:
This is how I wired the Dynavin harness to the “blue” BMW harness and what each wire does:
|BMW Harness||Dynavin Harness||Purpose|
|Brown||Pink||Ground (Parking Wire)|
|Purple-White||Red||12V Ignition trigger|
|White-Red-Yellow||White (on Sys-Box)||Steering Wheel Controls|
For the steering wheel controls, make sure to plug the jack into the female plug labeled IR on the Dynavin unit. I ran a hook-up wire from the Blue wire on the Dynavin to the switch power wire on the amp.
Since I have an aftermarket amplifier, I did not bother trying to figure out what speaker wires output where. I just ran RCA wires from the Dynavin to the amplifier to provide signals for the four channels. From the amp, I ran the four outputs to a pair of 3-way crossovers for the front speakers and a pair of 2-way crossovers for the rear speakers. I did not want to run new speaker wires from the crossovers, so I spliced into the amplifier harness. The harness is really two harnesses held together with a clip. One half is black, the other gray. After searching the internet for a while, I came upon this wiring information and hooked up the the crossovers as needed:
|Wire Color||BMW Harness Number||Purpose|
|Yellow||13||Tweeter Rear Right+|
|Blue-Yellow||21||Tweeter Rear Right-|
|Blue-Brown||12||Tweeter Front Right-|
|Blue-Black||11||Tweeter Front Right+|
|Blue-White||4||Woofer Front Left+|
|Blue-Brown||3||Woofer Front Left-|
|Yellow||2||Woofer Rear Left+|
|Brown||1||Woofer Rear Left-|
|Yellow-Brown||34||Tweeter Front Left-|
|Green||42||Mid Front Right+|
|Yellow-Red||33||Tweeter Front Left+|
|Blue-Green||41||Mid Front Right-|
|Yellow-Brown||32||Tweeter Rear Left+|
|White||40||Mid Front Left+|
|Yellow-Black||31||Tweeter Rear Left+|
|Blue-White||40||Mid Front Left-|
|Blue||25||Woofer Rear Right+|
|Brown||24||Woofer Rear Right-|
|Blue-Red||23||Woofer Front Right+|
|Blue-Brown||22||Woofer Front Right-|
I put the crossovers on on a piece of wood that I flocked and put it in the location where the OEM amplifier was located. I will probably extend the wires a little as they are a bit tight, but they work. For the antennae, I ran an extension cable from the trunk to the back of the head unit. My reception is not very good, but it was not very good with the other head unit either. Fortunately, I don’t use the radio much, and listen to my MP3 collection constantly.
The GPS antennae was placed under the parcel deck under the rear window. I ran the wire with the rest of the wires.
Here are the images of the amplifier installed and the box mounted in the trunk:
Here is a shot of the Dynavin installed in the dash: