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Metra 40-EU20 Antenna Adapter

Works with select 2000-up vehicles — factory male to female Motorola antenna

Item #: 12040EU20

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10 Reviews | Ask Questions

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Metra 40-EU20 adapter

The Metra 40-EU20 adapter lets you connect an aftermarket antenna cable to the OEM factory radio. It has a European mini-style male plug on one end and a Motorola female jack on the other. Item 12040EU10 is also needed if installing an FM CD changer or FM modulator with your factory radio. Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this adapter is compatible with your vehicle. Warranty: 60 days.

Metra 40-EU20 Antenna Adapter Reviews

Average Customer Review:

10 Reviews

Metra 40-EU20 Antenna Adapter

Written by: Anonymous from Tx on January 13, 2016

2004 Volkswagen Jetta
Crutchfield Customer Review (What's this?)

Item as expected



Metra 40-EU20 Antenna Adapter

Written by: Thomas from Colorado on September 26, 2015

2003 Volkswagen Passat
Crutchfield Customer Review (What's this?)

This works just like it should. The Crutchfield website told me i needed this part to connect my Sirius radio and i'm glad it did. Easy to connect and works great.

Pros: quick and simple install

Cons: nothing to complain about.

Adapts Antennas

Written by: RobR from Illinois on January 6, 2015

2014 Jeep Patriot
Crutchfield Customer Review (What's this?)

Does just what it is supposed to do. Simple an straight forward.

Pros: Does the job.


Works as expected

Written by: Michael V from Chesterfield, VA on June 15, 2014

It's an antenna, it works not a lot to review.

Pros: Ease of install.

Cons: None

Easy and quick applicaiton 2 thumbs up

Written by: D. Chase from san diego, CA on February 3, 2014

2006 BMW 3 Series
Crutchfield Customer Review (What's this?)

that was made simple. great product piece to help aid my already project I was working on. the part works great. thx guys.

Pros: simple to use. strong material

Cons: none

Fits great !

Written by: William from Valparaiso, FL on February 22, 2009

2006 MINI Cooper
Crutchfield Customer Review (What's this?)

This adapter worked perfectly on my 2006 Mini Cooper where I was inserting an off the shelf Aux Input adapter in line with the antenna input to allow the use of an Ipod or XM radio through the factory radio. However, if doing anything similar to this, you will need both male and female adapters listed. Overall, another great product.



Works great

Written by: Robert from Highlands Ranch, CO on February 5, 2009

2003 Volkswagen Jetta
Crutchfield Customer Review (What's this?)

Although a bit expensive, this adapter was necessary to get the FM antenna to work in the Volkswagen. It fit and is working fine. Without a direct connect, the "over-the-air" FM output did not work well -- required changing FM stations frequently.



It works

Written by: Pietro from Tampa, FL on February 4, 2009

2003 Volkswagen Jetta
Crutchfield Customer Review (What's this?)

The item did exactly what I needd it to do. I just wish Crutchfield would have let me know that I needed this product when I ordered teh Sirius hard wire installation kit for 2003 Jetta.



Works Fine-Overpriced

Written by: united9198 from Wisconsin on August 6, 2008

2005 Chrysler Crossfire
Crutchfield Customer Review (What's this?)

This works as advertised and is of good quality. Unfortunately the price tag is way out of line.



Satellite install

Written by: dgithens1 from Fredericksburg, VA on February 6, 2008

I received a Sirius satellite receiver for my new Nitro and needed a few parts to install it to make it look as professional as possible. A call to a Cruchfield's knowledgable tech support and I ordered the antenna parts I needed. Crutchfield has the BEST TECH Support/Sales people anywhere, the right part the first time every time. That's why I use Crutchfield for all my audio needs. Thanks



Hands-on research

What's in the box?

Download owner's manual

  • Automobile antenna adapter with female Motorola connector on one end and a VW/BMW/European mini-style plug on the other end

Product Research


Compatibility: This antenna adapter allows you to convert a universal antenna connection to the factory antenna connection on selected Volkswagens, BMWs and other European-made factory radios. This adapter works with 2000 and up factory radios with the mini-style plug. To be certain, always check the Auto Install Guide.

For FM Modulators: If you are installing an FM modulator, you will need this antenna adapter, plus 12040EU10.


  • Female Motorola (Universal) Jack: Length= 2.087", Diameter= 0.528"
  • European Mini-Style Antenna Connector: Length= 1.026", Width= 0.367", Height= 0.52"
  • Cable Length: 5.875"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Customer Q&A

Crutchfield asked  
Why did you buy this?

To add isimple to my factory system. 40-EU10 required also. [ Theodore  Dec 13, 2015 ]

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