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I/AI bus (archive)

[ Follow Ups ] [ 3-series (E46) Message Board ] [ Msg. Board FAQ ]

Posted by Jack on March 03, 1999 at 08:22:46:

In Reply to: What is I-bus and non I-bus? posted by Aamir on March 02, 1999 at 16:46:57:

I bus is the interface used by the head unit in BMW's to communicate to/from the CD changer.

some of the newer head units use AI bus. My car for example ('99 328i with HK and navigation system) has an AI bus. so there are no adapters available yet. But I've been told there will be one in a month or so.

IMHO, I don't think it's wroth while to go after market on the CD changer. reason being the price difference is less then $50 in most situations. the I/AI bus adapter is $150, a sony/alpine 6 disk changer is $250 to $350. if we get a cheap $250 changer and the adapter that's $400 plus you'll need to customize a bracket for the changer to fit.

the BMW OEM changer according to people here can be had for $429. so you're looking at a $29 difference.

the BMW changer comes with 4yr/50000 mile warranty (same as your car) while the after market only comes with 1yr depending on your manufacturer.

Just my $0.02


: I keep reading that adapters are available for I-bus but not non I-bus stereos. What exactly is the difference and why would it be different for some e46's.

: Does it have to do with Upgraded HK systems versus stock or is there more to it? I figure since folks keep saying that you need to know whether you have I-bus or not, that this is not connected with whether or not you bought the HK upgrade.

: Also, has anyone actually successfully tried the oem changers? What adapter did you use? I have an alpine changer from my acura that I would love to be able to use in my 323.

: Thanks a bunch.

: Aamir

: : yes there is one available. check out this site

: : : Anyone know if there are adapters available to use retail alpine CD changers with the factory prewirwing? My friendly local stereo shop believes there is one available and is trying to find one. Please let me know if anyone knows of any. I will also let everyone know if my stereo shop is successful in finding one.

: : : 1999 323i

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