Originally Posted by xenon
What I mean is there is far less chance of a problem updating maps (which is designed to be user-updatable) than attempting to make coding changes yourself with a dodgy eBay lead and / or trying to update the car's firmware with a firmware version from the Internet.
PS - When I started in IT we were loading programs from punch cards.....
There is virtually no chance of bricking an ecu by updating to 2013 maps.
Flashing a Cas unit is another matter. I use a BMW Icom unit which is an expensive piece of gear. An Ebay cable might be ok for a bit of coding, but I certainly wouldn't trust it to flash an ecu with