I just completed a stereo upgrade on my 2001 Boxster S. I removed the CR-220 unit. I moved the climate control to the lower position and added a backup camera. The head unit I used was the Sony XAV-AX100. I chose it for having Apple Car Play, a volume knob and the bezel was the best match to the factory color and texture. I use Crutchfield for the the install kit and harness. I did have a few questions and they responded with good feedback. Because the Apple Car Play (or the Android version) requires you to connect to the unit via USB, I wanted to maximize the USB placement. I elected to use the cigerette lighter location. I removed the lighter which is a bit of a pain and gutted it. I used the lighter body as the frame to fit a USB receptacle as well as maintaining the factory lighting for the bezel. I epoxied the USB plug into place and it worked perfectly. I did remove the cig lighter fuse and pulled the 12VDC pin from the connector. I heat shrunk the pin and stowed it in the harness. I also installed a microphone in the factory location just to the left of the instrument cluster. It is proud mounted but works perfect even with the top down.
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