Diagnostic
 

Anyone knows where to find a good cable and software to read and clear error codes on a 2004 RX8?
I got something from eBay, but my computer doesn't seem to recognise the cable connected to the USB (and there's very little information on how to install the cable): eBay Australia: Buy new & used fashion, electronics & home d

Are you in Oz?
If so, this may not be your best choice, but a good starter ODB reader can be found at ScanGauge - Trip Computer + Digitial Gauges + ScanTools
If you are in Oz, the maybe private message ASH8 and he can assist you down there in making the right choice.