Month: January 2018

Alpine IXA-W404R Head Unit Optional Modules / Accessories

I recently picked up one of these head units very cheap from Facebook Marketplace. It appears to be a very modular unit with many accessories available for it. In fact I’d go as far as to say that many of the functions that it is designed for require optional modules to be purchased…not great from a consumer perspective but it seems to work for Alpine.

When researching this unit, I was unable to find a definitive list of all the compatible modules, so I have put together the following from various sources and I hope it is useful to someone. I have linked to the appropriate page on the Alpine or other suitable websites where possible.


Input Sources


Adapters & Cables


Audio Processing & Amplifiers



The user manual mentions the following but offers no part numbers or further information, I will update the details here if I find anything out.

  • “Vehicle Display Interface Box” – Interface box to output media information to dashboard MFDs, in some cases it can connect to and control in-car systems such as climate control and parking sensors. Also allows steering wheel controls in many cases. Vehicle support includes select BMW, Porsche, VW, Opel, Seat, Skoda and Renault from year approximately 2008 onwards. No mention of any other brands.
  • “Steering Controls Interface” – Same as above.