Subaru Navi Transplant Harness
Basic transplant harness configuration
The basic configuration is pictured above, and consists of:
Price for the basic transplant harness is $40.
Separate 24-pin reverse Navi harness
For installation into an older Impreza or Forester, I can provide the 24-pin reverse harness separately. Price for the basic version without SWC or CAN wires is $20.
For a custom version for other applications (different cars and/or HUs), e-mail me with the details of what you would like to do.
Additional Options for A/V Inputs and Outputs
The OEM Kenwood Navi has several audio and video inputs and outputs.
I recently had factories make several of the components I use to build the harnesses, so the "basic" transplant harness no longer includes the plain wires for the aux input or subwoofer output (but I can add those if you want them that way).
Add any of the following to the basic transplant harness or separate Navi reverse 24-pin harness:
All harnesses are built to order. If you want something a little different, tell me what you would like to do.
Not entirely plug-and-play
While the basic transplant harness takes care of most of the connections between your car and the Navi HU, you will need to connect at least two of the wires on the 24-pin harness. These signals are not available behind your HU, so you will need to find and tap them elsewhere under the dash:
See my installation instructions for details (link below).
Audio Steering Wheel Controls (SWCs)
The OEM Kenwood Navi HUs in all models (2008–2012) require the older-style steering wheel controls (with only 6 audio functions — volume up/down, track up/down, mode, and mute).
If your Impreza or Forester is a 2011 or later model with the phone/Bluetooth buttons (off-hook, on-hook, and talk), none of your SW buttons will work with the Navi HU. The easiest solution is to downgrade to the SWC buttons used on 2011–2012 models with the OEM Navi. This swap is plug-and-play inside your steering wheel, and will work with my standard transplant harness (no special modifications needed).
Alternatively, you could build your own custom device to interface between your car's SWCs and the Navi HU. I'm not aware of any off-the-shelf steering wheel interface modules that will talk to the OEM Navi HU. If you decide to try this approach, you should ask me to build the 20-pin harness with 3 SWC wires and not connect any of them to the 24-pin harness.
Microphone socket (for Bluetooth handsfree call operation)
Unfortunately, I don't yet have a connector that fits the Navi's 5-pin Bluetooth microphone socket.
For 2008–2009 Navi HU models, you can order the OEM microphone from a local or online Subaru parts dealer (part number H0018FG300, $125 list, or just under $100 online). You might search for the Kenwood KNA-VC300 microphone, which has the correct 5-pin plug (and is nearly plug-and-play — you'll need to add a new pin/wire or relocate one of the existing pins). Or see this post for do-it-yourself instructions.
If your Navi HU came from a 2010 or later Impreza or Forester, you will need to retrofit the corresponding OEM amplified mic module (located in the map light cluster). You must use the mic from a car that had the 2010–up Kenwood Navi factory-installed. Although 2011–up models have a similar map light mic, a mic from a non-nav car will not work! Alternatively, design a mic and amp circuit equivalent to the OEM module.
Note: The Navi HU does not do Bluetooth audio streaming. It only uses BT for phone calls.
The Impreza and Forester OEM Kenwood Navi HUs do not have USB capability built-in. So if your car has the factory USB socket next to the aux jack in your armrest center console, there is nowhere on the back of the Navi to connect that USB socket.
Subaru offers an accessory called the "Media Hub." The kit consists of an interface module (which plugs into the 20-pin expansion bus port on the rear of the Navi), and a replacement aux "pod" for your armrest console. The new pod has an aux jack like what you had before, but also ads a USB socket.
2011 was the earliest year that the Media Hub is compatible with the Navi HU. See Subaru's page with information and FAQs. You should be able to order the kit from local dealers and online Subaru parts vendors. Tell me if you plan to add that — I'll have additional tips.
Prior to the Media Hub, Subaru offered an iPod interface that worked the same way, providing a cable with an iPod dock plug, This kit was compatible with 2008–up Navi models.
However, search for reviews before you buy either of those.
AM / FM Antenna socket
When it hasn't been cut off, the Navi HU has Subaru's proprietary antenna connector (with a square, gray plastic shell and a tiny coax antenna cable).
If your Impreza or Forester has the older-style, round Motorola plug, follow that cable back into your dash. Most 2008 and later models actually have Subaru's proprietary antenna plug, along with an OEM adapter to convert to the Motorola plug, Approximately 6 to 8 inches (15 to 20 cm) back from the Motorola plug, you should fund a junction of square, gray connectors (probably wrapped in a small square sheet of foam rubber). There is a release button on one side of the car's plug.
Caution: Do not pull the coax antenna cables! The wires are somewhat fragile, and people have accidentally ripped them out of the crimped ends (or even out of the HU).
If your car does not have Subaru's antenna plug, you'll need a reverse antenna adapter (picture). I have those for $10.
The Navi HU does require a GPS antenna for nav functions. The OEM GPS antenna is factory installed only on cars that have the OEM Navi HU. I do not have any for sale.
If you opt to order an OEM antenna, it consists of two parts: The GPS antenna (with mounting bracket and a short "pigtail" cable), and a separate extension cable to reach the rear of the HU. Check with your Subaru parts vendor for the part numbers.
UPDATED: If you buy an aftermarket GPS antenna, it must have an Eclipse-style plug. Here's one on eBay from a vender in the US, with a good picture of the plug (I don't know anything about that vendor or the reliability of their antennas). I have seen antennas with the same plug from other vendors in Hong Kong.
GPS antennas for some aftermarket Kenwood HUs have a plug with electrical contacts that will match the Navi's socket, but you will need to shave off a little bit of plastic from the plug.
Map and Software Discs
I don't have any discs. The latest maps can be purchased from Kenwood, here:
The same map discs are used by 2008–up Impreza, 2009–up Forester, and 2010–up Legacy/Outback.
A Navi HU that has somehow been completely reset may require that you initially load software from a different DVD. See this post. Ask your local dealer — they may have a software disc that they will let you load while you're there.
Additional information and considerations
See my Subaru 24-pin Navi harness pin-out table for more information about the factory wires.
See this post for compatibility issues between old (2008–2010) and 2011 cars and Navi HUs.
Also see my installation instructions.
Not sure what you need? Please e-mail me before ordering.
Tell me your car's model and year, the model number printed on the front of your OEM HU, and (if you've already obtained a Navi HU), the Kenwood model number of the Navi HU (usually starts with FXD...).