USA SPEC Auxiliary Interface

Connect a music player to your 1998-up Volkswagen factory radio!

Item #: 581DFVW

10 Reviews

This item is no longer available.

Original Price: $69.99

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Enjoy maximum possible sound quality when you play your portable music through your Volkswagen's factory radio. USA SPEC's innovative DF-VW adapter lets you connect your portable music player directly to your compatible 1998-up Volkswagen factory radio. Just plug the adapter cable into your radio's CD changer input, mount the interface box, and you're ready to listen to your tunes.

And the news gets better — if you also have another sound source you want to hook up to your Volkswagen's sound system, the DF-VW provides a second set of connections for an iPod, satellite radio tuner, or DVD player. You can switch between sources with your factory radio controls. Warranty: 1 year.

Please enter your vehicle information or call a Sales Advisor at 1-888-955-6000 to find out if this adapter is compatible with your vehicle.

USA SPEC Auxiliary Interface Reviews

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Great Product

Written By James, Michigan on Saturday, September 22, 2007

Crutchfield Customer Review (What's this?)

Make sure your VW has the right radio for this unit. You need to have the radio with the round scan button.
This unit will need to be installed back in the area where the CD changer goes - not behind the dash. It will only plug into the CD changer cable-end, not directly into the radio.

This thing has a black wire with a spade lug on it. The instructions don't tell you what this wire is for; it looks like a ground wire (and it is). Definitely connect this wire to a ground point. It will work without it, but you will get a little bit of noise (alternator whine) unless you ground it.

Lastly, because your iPod or whatever device is likely to be up-front, a long way from this unit, do yourself a favor and get really good interconnect cables. Get the best you can afford, you'll be glad you did.

Enjoy this thing. It's a great solution if you really want to keep your factory head unit, as I did. Keeeping your factory head unit is great security - if it's in there, no thief will suspect that you have expensive audio gear in your car. And the VW radio is pretty good, for a factory thing. Have fun.

2002 Jetta Install

Written By guayuque, Palm Desert, California on Wednesday, February 07, 2007

Crutchfield Customer Review (What's this?)

I ordered this to install Sirius in my daughter's Jetta. Easy, easy install with one tip that is not clear from the instructions but I saw either on here or another site.

If your Jetta does not have a CD changer already, when you remove the panel on the left side of the trunk you will see what looks like the plug for the CD Changer. It is set in pretty tightly into a wiring loom. THIS IS NOT THE PLUG AND IT WON'T FIT THE PROVIDED CABLE. What looks like a plug is actually a cover to the plug you need. You have to take the fitting out of the loom (it is in there pretty tight) and then when exposed you can remove the cover which then exposes the real plug that will fit the provided cable.

Other than than, seamless! Great product.

Gone Out Twice Now

Written By Brian, Snow Camp, NC on Friday, January 05, 2007

Crutchfield Customer Review (What's this?)

When it's working, it works pretty well. I wasn't able to find a method for totally eliminating a high-pitched buzz from the sound. The worst problem, though, is that twice now, I've gotten in the car, turned on my mp3 player, and then turned on the radio, only to have the stereo (factory) tell me there was no CD. Usually when it's working, it says CD1 or CD2 and then comes up with some random playing time information. When it's not working, it says no CD, and there is no sound at all.
The first time it happened, I switched the cables on the USA SPEC Auxiliary Interface from input 1 to input 2, and then it worked again. I suppose I can try to switch it back again, but I'm going to try something else. It bites when it goes out!

Excellent Sound, Installation Worked On Euro Version Of Stereo

Written By Dan, Auburn, Wa on Monday, December 25, 2006

I took a chance and ordered this iPod adapter, even though I have the European version of the 2004 Jetta stereo system with GPS navigation (navi version "D"). I do NOT have the round scan button that is listed as being necessary in the product description, but it worked great anyway.

From other reviews, it appears this unit is supposed to hook into the CD changer plug in the trunk. However, mine plugged into the back of the stereo system and the cable to plug into the trunk connector was not included. There was also a note with the shipment that indicated there had been previous problems with noise when using the trunk mount plug in the VW's. Fine by me, it sounds great plugged directly into the rear of the stereo. But you'll want to make sure you have a set of stereo removal tools handy in order to make the connection, since removing the VW factory stereo can be a pain without them.

The CD controls work, but the song names are not listed on the LCD screen. It just shows up as track 1, track 2, etc.

I mounted my control module just above the passenger foot-well, behind the glove box (I removed my glove box during the install just to make it easier to route the cable). I ran the iPod control cable into the glove box itself, and that's where I chose to have my iPod sit, completely out of sight.

Install time took about 30 minutes.

Simple fix

Written By joel, Roanoke, VA on Monday, May 29, 2006

I wanted a solution for playing my iPod through my factory Monsoon system in my 2003 Jetta TDI. As many of the other reviewers noted - this product works great. The installation instructions left out a couple of details though. Once you open the compartment in the trunk (driver's side) you have to pop the connector loose. There is also a cover over the end of the connector. The tricky thing is that it doesn't look like a cover. It looks like a connector and the connector that comes with the interface will not fit. Ended up calling the manufacturer and he told me to take the cover off. Once I got the cover (that looks like a connector off) it works perfectly!

Works great, but needs better install directions!

Written By DesertShell, Tucson, AZ on Saturday, October 01, 2005

Crutchfield Customer Review (What's this?)

My Aux adapter works great in my 2003 New Turbo S. But the instructions are not entirely helpful- Crutchfield should save the paper and not bother with the 'Mastersheet'. Here is what I found: There are 3 locations to connect the adaptor- 1)The most common is in the trunk, back Drivers' side. 2)Under the center console. This was where mine was (Normal I think for 2003 and later). Pop the velvety console case and the port is hidden just past the cigarette lighter wiring. Be sure to pop the black cd port cover or it will not work(no one tells you that). 3)Directly to the back of the radio- usually requires an 8 pin adaptor so this USA Spec adaptor won't work. You will need a special tool to remove the radio. What a hassle.
So, I installed my adapter in my center console, very convenient. Here is what they don't tell you you should have: A 3.5mm mini jack to RCA cable (to connect my Creative MuVo to the Adapter. A cigarette lighter plug to USB port (for recharging). And a USB Male A to USB mini 5pin B Male cable (to connect from my MP3 to the charger). Then, you are good to go.
Hope this helps. Matt

USA SPEC Auxiliary Interface

Written By easy2kill, SF, CA on Monday, August 22, 2005

Crutchfield Customer Review (What's this?)

Product worked as advertised. I installed this in my 2000 Passat GLX. I wished the description had mentioned that this can only be installed wherever your CD Changer "plug" is located (mine was in the truck, left side). I was hoping it could also be installed in the CD "port" behind the factory radio, but you'll have to buy a different model for that. You'll want to buy long enough RCA cables and figure out a way to run them closer to the front of your car. The sound quality is great.

Good Product, Just One Thing to Watch out for.....

Written By David, Detroit, MI on Friday, July 29, 2005

Crutchfield Customer Review (What's this?)

I bought this product so that I could use my Creative Labs Zen in my VW Jetta. The install is a piece of cake and the product works as advertised. I did get some alternator whine in the system. I disconnected...yes I said DISCONNECTED the gound wire and the alternator whine dissappeared.

I highly recommend this product if you're on a tight budget or don't own an iPod.

Great adapter, Solid price

Written By Jimmy, Frederick, MD on Tuesday, June 21, 2005

Crutchfield Customer Review (What's this?)

I got this adapter to hardwire an iPod to my Jetta. The CD changer port for the Jetta was on the left in the trunk, behind a door that falls down...installing was a breeze. The adapter worked perfectly and solves the problems of a cassette or FM modulator in VWs. Defintely recommended.

Sweet and simple

Written By Brad, Baltimore, MD on Thursday, May 12, 2005

Finally, an AUX adapter for factory stereos! The installation in the Jetta was a breeze. Since you just plug the adapter into the changer cable in the trunk, the install was easier than a FM modulator (VW makes it pretty tough to remove the factory radio). The sound quality is great with the satellite radio. I would recommend this item.

Hands-on research

What's in the box?

Download owner's manual

  • Auxiliary interface adapter
  • 11" CAS-VW cable (has a rectangular 9-pin connector on one end and a round 8-pin connector on the other end)
  • 4 Self-tapping screws
  • Owner's Manual

Product Research


Compatibility: The DF-VW allows you to add two auxiliary inputs to the factory radio in select Volkswagen vehicles. The adapter plugs into the factory system using the supplied cable, avoiding wire splicing and modifications. Since the adapter is controlled by the factory radio, the available controls should be described in the factory manual.

Note: The adapter is not compatible with vehicles that have factory navigation and DVD systems. The adapter takes the place of the CD changer, so you cannot have a CD changer and the adapter connected to your vehicle at the same time.

Mounting: The adapter can be secured to any flat surface using the supplied mounting screws.

Connections: The adapter has two auxiliary inputs (Audio Input 1 and 2) on the left side panel. Each input consists of left and right RCA audio jacks. On the right side panel, the adapter has a round 8-pin jack that interfaces with the supplied CAS-VW cable. The cable's round 8-pin connector plugs into the adapter, while the rectangular 9-pin connector plugs into the factory changer cable. The rectangular connector also has a grounding wire that must be secured.

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