Works, mostly.

The 2nd one works fine. First had some sort of problem with interface and rear speakers wouldn't work. Crutchfield warrantied it and sent out a replacement quickly. Does not retain factory steering wheel controls on Audi A4 though.

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Crux SWRAD-55 Wiring Interface

I recommend this. I had a hard time with the rating, since it worked really well to make sure I had to do nothing to my OEM harness to hookup the radio, and everything worked, including the steering wheel volume and selector controls. I marked it down a bit because there was so much to throw away (it fits many models and I did not need it all). It was also tough to spend about as much on this kit as on the radio.

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Crux SWRAD-55 Wiring Interface

Product is great worked well with a hard to integrate Audi wiring system. Instructions are a little vague

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Crux SWRAD-55 Wiring Interface

Factory Subwoofer no longer worked after this kit was installed.

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Worked, but definitely not plug & play!

Ordered the kit for my 2001 Audi A4 with Symphony head unit and Bose factory amp. Plugs were correct for my car, but the 12v accessory pin was in the wrong place, and I had to add a wire to power up the amp. Better than wiring up the amp without this, but you will need basic wiring and electrical skills for this application. Good chance to teach my kid, though. Also, I didn't use most of the harness since I don't have factory steering wheel controls. Seems like a lot to pay for all the extra work and landfill.

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Must have

This is a must have for any deck installation

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Crux SWRAD-55 Wiring Interface

The box works as advertised. Makes connecting stuff super easy (I did pay Crutchfield to join the harnesses though). The instructions are not detailed, perhaps aimed towards pro installers. I rarely do this so I felt a bit unsure but in the end everything worked out.

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Crux SWRAD-55 Wiring Interface

Plug and play for my Alpine ILX-W650 ina 2002 Audi A6. Easy.

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Crux SWRAD-55 Wiring Interface

Pretty self explanatory..SWC work as advertised

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Crux SWRAD-55 Wiring Interface

Works great! And great support too!

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Crux SWRAD-55 Wiring Interface

Only ended up needing one of the wire bundles packaged. At least it was discounted with the purchase of the radio. Crutchfield has always been real good about vehicle specific needs but missed it on this one. I payed too much for a box of useless wire bundles.

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Gets the job done

Had Crutchfield team do the wiring for my new receiver so the plug and play aspect was mostly clear when received. The $ spent was well worth the time connecting the various harnesses. Moreover, not having steering wheel controls wasn't a big deal for connectivity and also not having the ancient Nav system dysfunction isn't a big deal at all. A built in antenna booster would be nice as aftermarket receivers are notorious for increased interference.

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Crux SWRAD-55 Wiring Interface

Used this interface to install a Kenwood Excelon DDX9903S in my 2002 Audi A6. Connections were perfect and retained steering wheel controls.

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Crux SWRAD-55 Wiring Interface

Ok, I guess. Had to call customer support (excellent customer support from Crutchfield) to get the wiring correct. Not the greatest documentation.

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Does not "fully" integrate

Everything works except the voice control on the steering wheel, and integration with the factory microphone. Very disappointing!

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Does not do as it claims.

This product does not allow you to keep your SWC.

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Crux SWRAD-55 Wiring Interface

didn't fully integrate with my steering wheel controls, but otherwise good.

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Good product

Easy to install.

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Seamless

So many wires but eventually understood what was needed and what was not.

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Wire Harness

Confusing directions and not very clear which parts were needed or extra. Worked in the end but lost some of my steering wheel controls. Plan on some online google time to figure it out.

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Crux SWRAD-55 Wiring Interface

This worked well but the instructions for the blue wire that turns on the amp is not clear. I had to watch online videos to figure it out.

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Crux SWRAD-55 Wiring Interface

Confusing, poor directions. Blocks out the K-Line for diagnostics!! You will not be able to computer diagnose the vehicle while this module is attached to the car!! I does function well though, cannot use the click wheels on my 2006 S4 though, can only scroll for volume and track forward/reverse.

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Fairly Complex But Works

It was fairly complex to hook it all up, mostly because it's made to fit many different car models/years. When connecting/splicing this harness to the head unit's harness, I strongly recommend temporarily twisting and taping the wires together and testing the head unit to ensure all the wires are connected where they're supposed to be, then make your final connections by soldering or crimping. The instructions could've been more clear on what some of the wires do. The kit comes with two identical SWC harnesses. I'm not sure why; you're only going to use one of them and throw the other one away. And even those harnesses are basically two separate harnesses taped together. You can cut the tape off and separate them entirely, which is what I did. One thing I don't really like about this harness is the rear speakers work, but they're at a significantly reduced volume from the front speakers. After doing some online checking, I found out this is a common problem when hooking up an aftermarket head unit and using the factory amp. You'd think a kit specifically for these Audis would have a solution for this built in, but no. I've heard of people correcting the problem with a line-out converter. Myself, I just adjusted the fader towards the rear to even it out and it sounds fine. The harness retains most of the SWC functionality. At first none of them were working, then I finally figured out they only work with the ignition on, and they don't work in the accessory position

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Wiring kit for 2003 Audi A6

The wiring kit made switching to the new radio a snap. All of the original functionality and speaker system worked perfectly from day one.

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A jumbled mess of wires

Included with this package was a variety of harnesses which were included to cover the gamut of possible configurations of the Audi A6 (2003). The directions included as well as the directions from Crutchfield were very limited, and only because I have some experience with car stereo installations was I able to dope it out. There were also many, any wires which had to be spliced, I had hoped for a total or near total plug and play experience. All totaled, it took me two full days to install the radio (Although the back up camera took a considerable amount of that time). Other wires were poorly marked, for example the wire to the antenna booster was marked power antenna - those are two very different things!

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Easy!

The harness worked well. Support from Crutchfield and from Crux was wonderful!

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Great for 2004 Audi

Makes it easy to connect to the factory harness and retain steering wheel controls.

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Does what it should.

Worked fine with my 2005 Audi. I can use some of my steering controls. After contacting Crux they said they're working on adding more functionality. I do wish it was a programmable unit (like one of my crutchfield assistants said it was) so you could choose what to do with your steering controls. I also noticed an led is on always even when the car is off, I have some concerns about it draining my battery if I don't turn on the car regularly.

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crux

good product

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Just a brick now

I was required to purchase for half price just to get switched power to the factory amp. Lots of unneeded functionality - too big to fit behind radio - failed after less than a year.

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Works All Except Rear Audio

Works for connecting steering wheel controls - also controls rear sub but I do not have any sound coming out of my rear speakers. From what I have read on forums I will have to either rewire from the H/U or hook up an additional speaker amp, which is what I'll most likely do. 2007 Audi A3 2.0T

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Good Interface

Good harness for doing what you need to get done. Had to call tech support for some clarification as the lines are not labeled that clear. Good thing I know a thing or two about wiring as the two remote wires they had labeled backwards - one for the amp, one for the antenna. Connect these in reverse and you'll have radio but when you switch to another input device you lose the amp and get nothing for sound.

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