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Thanks for the comments guys! I'm going to go with the ECS wired-in kit and one of the bluetooth kits mountainhorse recommended! Then I just have to decide whether or not to uninstall the OEM handsfree kit... which I will likely do, just so I can mount a factory cup holder (if I can find a reasonably priced anthracite version not from the Baltic states!).
Wow hard to believe it’s been 8 years…. We sold this car late 2014 and miss it to this day.
In fact I just bought a ‘21 deep crystal blue Miata that is the spiritual successor of this car (once I supercharge it lol)
Anyway, got me to thinking about the old days. I have all the photos from the retrofit stored on Flickr should anyone want access to those. R53 retrofit installation photos
What a great thread and a lovely car. I'm very lucky to own one of the last factory JCW cars. I've managed to acquire most of the parts to do a factory install. The one thing I can't find is either a diagram for the 54 pin connector, or any information as to how it might be wired. If anyone has or could share any information, it would be much appreciated