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Anyone know late Z3 steering wiring airbag and horn?
If you take the centre console apart a bit you should see the airbag controller which you can remove. This stops the warning light.
From memory the horn wiring is separate from the airbag wiring. There is one wire to the back of a sprung plate and one to the front. When you compress the plate they touch and your horn sounds
I have the same wiring as you as mine is a 2002. I had to search around on the Z3 forums, most of them are relative to the older style wiring, but there was a good one a found with easy step throughs for a late model such as ours. Unfortunately this was one of the first things I tackled whilst waiting for my kit to arrive and was nearly 1 year ago, memory is not that good, but I ended up buying off ebay some resistors and inline connectors, which are connected under the panel under the wiper stalk. Also had to buy a reset device to get rid of warning light that plugs into the engine bay diagnostic connector reset it.