Average rating:
average rating 99%
Smart radio wiring harness for most Audi's that fixed the low rear audio and low sub problem.

Product Features

  • This is the most advanced radio installation harness we offer.
  • The HILO box fixes low audio issue in your Audi.  The signal of the factory radio is much higher (8-10 volts) than aftermarket radios (2-4 volts)
  • The smaller box allows you to use your factory steering wheel controls with your aftermarket radio. You will need to purchase a SWCL (Steering Wheel Control Lead) to activate this feature since some cars do not have steering wheel controls. (see below)
  • The smaller box reads the cars can-bus (data) wires. The following wires are transmitted to the factory radio through the can-bus wires. The small box converts the following wires into analog signals that your aftermarket radio can read.
    Red- switched power turns the radio on and off with the key and keeps the radio on until you pull the key out of the cylinder.
    Orange- Illumination wire dims radio when you turn on your lights.
    Mint Green- Parking brake wire unlocks security features when your parking brake is engaged.
    Purple with White Stripe- Backup camera reverse wire tells radio to Initiate back-up camera screen when you are in reverse.
    Pink- Vehicle Speed Sense wire tells the radio how fast you are going to improve accuracy especially when you lose GPS or cellular signal.
  • This harness is designed to connect directly into some older Blaupunkt brand radios.  If you are not installing a Blaupunkt radio we have a PNP converter that allows you to connect to your new radio without cutting any wires.

Additional Information

  • The knobs on the HILO box adjust the volume of the amplified speakers in the car. If you have Bose all the speakers are amplified. If you do not have Bose usually only the rear speakers and sub are amplified.
  • Not all the wires on the cars harness will be used.
  • Most cars that use this harness also use the AAA-VWAUD5 antenna adapter below.

Compatible Cars

Cars Notes
Audi A3 2006-2007 -Only compatible with cars with the RNS-E navigation radio.
Audi A3 2008-2013 -Compatible with all radios.
Audi A4/S4 2004-2006

-Only compatible with cars with the RNS-E navigation radio.

Audi A4/S4/RS4 2007-2008 -Compatible with all radios except the single CD half height radios available in some non US markets.
Audi A6/S6/RS6 2004 -Only compatible with the RNS-E radio.
Audi Allroad 2004-2005 -Only compatible with the RNS-E radio.
Audi TT/TTS/TTRS 2007-2015 -Compatible with all cars. Some Audi TT require a digital tun on. -The post below shows you how to deal with a digital turn on. We used to make a $100 add on to fix the turn on issue but we made no money on it and it caused too many headaches. -https://forums.vwvortex.com/showthread.php?5645132-Bose-aftermarket-HU-WARNING!&p=87026112&viewfull=1#post87026112
Average rating:
average rating 99%
180 reviews

Featured positive reviews:

average rating 100%
Great Product and Support!
I almost never write reviews … but this time I think it is a must. I was having trouble installing my new Alpine iLX-W650 in my 2007 Audi RS4 (B7). I brought the head unit and the harness from a well know online retailer and was told it was a simple install. After I received the head unit, the instruction were very inadequate. After a couple of semi-helpful but conflicting support calls, I researched and found the video by Christian at Enfig. I got the unit install but it sounded terrible and was barely functional.
After some frustration with the new head unit, I called Enfig and Christian answered the call. Within a couple of minutes he diagnosed the problem and sent an email with the parts he suggested would work better for my install. I ordered the SRWH-AUD3-HILO harness with the SWCL-ALP steering wheel control and the Alpine adapter PNP-ALP007.
The installed of the new parts and harness was easy even for a guy who had not put in a car stereo in like 10 years. My new hea

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