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CD changer interfaces install at the rear of your existing factory fitted radio or to the pre-installed CD lead if one is fitted (depending upon radio and/or car type). If installation is to the rear of your radio, run the CD BUS lead from the interface to the mounting location of your changer.

Some Factory installed radios will accept aftermarket CD changers without the need for an interface and in such a scenario the CD changer will have the same software as that of a dealer supplied CD changer. For example radios that are compatible with the VDO 026 CD changer and Visteon 2080 CD changer dont need interfaces.

Important: When installing interfaces ensure your keys are completely removed from your ignition.

Factory Fitted/Dealer CD Changers An important issue

Factory-fitted/dealer CD changers are CD changers that are fitted at the factory or supplied by car dealers (i.e. Audi, BMW, Volvo, etc) and generally carry part numbers such as 786511203 as opposed to part numbers such as CHM-S630 that aftermarket CD changers have. Their overall styling is also a lot more basic than aftermarket CD changers.

These CD changers will only work with the radios that they were manufactured for and will not be compatible with CD changer interfaces that car audio shops supply. This is simply because the software used in the CD changers is very different to that used in aftermarket CD changers.

We often get enquiries from customers who have removed these from their car before selling (so they can re-use them in their next car)or bought one going cheap on Ebay, etc. only to find out that they cant use them unless they will be using them with the factory radio that they were made for.

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Chimezirim Odimba writes for CarAudioPlus.