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Originally Posted by terrymcg
Hi guys, I am new to your forum. I have just bought an E46 M3 here in the UK. But found your nav section the most informative of all the BMW forums!
My query is, the car I bought came with the 16:9 screen and TV module, But nav was never specced on the car from new. Can I simply add a MKIV nav computer to get it? In the boot the only plug I can see is a blue one going into the TV module. There is an empty white slot also on the TV module. Am I right in thinking, if I remove the blue plug from the tv mdule and plug it into the MKIV it will work fine, and I just will not be able to use the TV? I cant seem to find too much info on this as most people have nav and tV!!!
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Yes, you can do what you want to do.
Leave the blue plug in the TV, but add the loom that connects the nav blue plug to the TV tuner white plug. Look on ebay for these, one from an E39 will do just fine.
Then you need to cable the purple plug, as this has the dead reckoning signals (speed pulse, direction indication)
And of course a GPS antenna.
Once cabled it will work, but you should get the system coded by a dealer so that the car properly knows that it has navigation fitted.